Pub Date : 2020-09-07DOI: 10.4236/jacen.2020.94019
P. Mensah, S. J. Mitchual, M. Apetorgbor, K. Frimpong-Mensah
Many factors including depletion of the forest, environmental awareness, and generation of large quantities of agro-forest residues have increased the need to partially or wholly replace wood with agro-forest residue for particleboard production. This study assessed the decay resistance of particleboards produced from four agro-forest residues using cassava starch and urea formaldehyde as adhesives. Musa paradisiaca pseudostem, Theobroma cacao stem and pod, and sawdust of Ceiba pentandra were used for the study. Properties determined were: Weight loss, decay resistance rating and decay susceptibility index. These properties were evaluated after 12 weeks of exposure to Coriolopsis polyzona in accordance with ASTM D 2017-05. The results indicate that the weight loss for Musa paradisiaca pseudostem particleboard was least for both urea formaldehyde and cassava starch adhesives. Even though almost all the particleboards produced were classified as resistant or highly resistant to fungi attack, those produced with urea formaldehyde had better decay resistance properties than that of cassava starch. Furthermore, particleboards coated with synthetic polyvinyl lacquer had better resistance to fungi attack than the uncoated ones. At 5% level of significance, the agro-forest residue, adhesive and surface finish as well as their interactions had significant effects on decay resistance of the particleboards produced. It is recommended that further studies which aim at determining the effect of combination of the agro-forest residues and that of urea formaldehyde and cassava starch be conducted to determine their effects on decay properties of particleboards.
许多因素,包括森林的枯竭、环境意识和大量农林残余物的产生,增加了用农林残余物部分或全部取代木材用于刨花板生产的必要性。本研究以木薯淀粉和脲醛为粘合剂,评估了四种农林废弃物生产的刨花板的耐腐性。本研究使用了拟木犀茎、可可茎和荚以及Ceiba penandra的木屑。测定的特性为:重量损失、耐衰变等级和衰变敏感性指数。根据ASTM D 2017-05,在暴露于多带Coriolopsis 12周后评估这些特性。结果表明,脲醛和木薯淀粉两种胶粘剂对木麻黄假茎刨花板的失重最小。尽管几乎所有生产的刨花板都被归类为耐真菌或高度耐真菌侵袭,但用脲醛生产的刨花板比木薯淀粉具有更好的耐腐烂性能。此外,与未涂覆的刨花板相比,涂覆合成聚乙烯漆的刨花板具有更好的抗真菌侵袭性。在5%的显著性水平上,农林废弃物、粘合剂和表面光洁度及其相互作用对生产的刨花板的耐腐性有显著影响。建议进行进一步的研究,以确定农林残余物与脲醛和木薯淀粉的组合对刨花板腐烂性能的影响。
{"title":"Decay Resistance of Particleboards Manufactured with Four Agro-Forest Residues Using Cassava Starch and Urea Formaldehyde as Adhesives","authors":"P. Mensah, S. J. Mitchual, M. Apetorgbor, K. Frimpong-Mensah","doi":"10.4236/jacen.2020.94019","DOIUrl":"https://doi.org/10.4236/jacen.2020.94019","url":null,"abstract":"Many factors including depletion of the forest, environmental awareness, and generation of large quantities of agro-forest residues have increased the need to partially or wholly replace wood with agro-forest residue for particleboard production. This study assessed the decay resistance of particleboards produced from four agro-forest residues using cassava starch and urea formaldehyde as adhesives. Musa paradisiaca pseudostem, Theobroma cacao stem and pod, and sawdust of Ceiba pentandra were used for the study. Properties determined were: Weight loss, decay resistance rating and decay susceptibility index. These properties were evaluated after 12 weeks of exposure to Coriolopsis polyzona in accordance with ASTM D 2017-05. The results indicate that the weight loss for Musa paradisiaca pseudostem particleboard was least for both urea formaldehyde and cassava starch adhesives. Even though almost all the particleboards produced were classified as resistant or highly resistant to fungi attack, those produced with urea formaldehyde had better decay resistance properties than that of cassava starch. Furthermore, particleboards coated with synthetic polyvinyl lacquer had better resistance to fungi attack than the uncoated ones. At 5% level of significance, the agro-forest residue, adhesive and surface finish as well as their interactions had significant effects on decay resistance of the particleboards produced. It is recommended that further studies which aim at determining the effect of combination of the agro-forest residues and that of urea formaldehyde and cassava starch be conducted to determine their effects on decay properties of particleboards.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":"09 1","pages":"240-254"},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44850025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-07DOI: 10.4236/jacen.2020.94018
Md Mahfujur Rahman, L. Lisa, Sunzid Ahmed, M. Uddin, Tuhina Hasan, S. Zaman
The effect of different farming systems on microbial communities in agricultural environment was investigated in the present study. Depending on the present farming trend, the microbial distribution in agricultural soils treated with organic, semi-organic and conventional fertilizers was analyzed. A total of 20 soil samples were collected from different types of agricultural fields of Bangladesh Agricultural Research Institute (BARI, Gazipur). Microorganisms playing beneficial roles in soil such as nitrogen fixation (e.g. Rhizobium sp., Azotobacter sp.), phosphate solubilization (e.g. Bacillus sp., Pseudomonas sp., Phosphobacteria) and auxin production (e.g. Pseudomonas sp., Serratia sp. and Bacillus sp.) were evaluated from each of the samples. The results revealed that agricultural fields treated with chemical fertilizers showed lower microbial count than that of organic fertilizer treated agricultural fields’ soil samples. In addition, organic fertilizers amended field soils have higher phytohormone (Auxin) activities, phosphate solubilization bacteria and other bacterial richness compared to chemical fertilizer applied field soil.
{"title":"Isolation and Characterization of Beneficial Microorganisms in Organic, Semi-Organic and Conventional Fertilizer Treated Agricultural Field Soil and Comparison of Bacterial Richness","authors":"Md Mahfujur Rahman, L. Lisa, Sunzid Ahmed, M. Uddin, Tuhina Hasan, S. Zaman","doi":"10.4236/jacen.2020.94018","DOIUrl":"https://doi.org/10.4236/jacen.2020.94018","url":null,"abstract":"The effect of different farming systems on microbial communities in agricultural environment was investigated in the present study. Depending on the present farming trend, the microbial distribution in agricultural soils treated with organic, semi-organic and conventional fertilizers was analyzed. A total of 20 soil samples were collected from different types of agricultural fields of Bangladesh Agricultural Research Institute (BARI, Gazipur). Microorganisms playing beneficial roles in soil such as nitrogen fixation (e.g. Rhizobium sp., Azotobacter sp.), phosphate solubilization (e.g. Bacillus sp., Pseudomonas sp., Phosphobacteria) and auxin production (e.g. Pseudomonas sp., Serratia sp. and Bacillus sp.) were evaluated from each of the samples. The results revealed that agricultural fields treated with chemical fertilizers showed lower microbial count than that of organic fertilizer treated agricultural fields’ soil samples. In addition, organic fertilizers amended field soils have higher phytohormone (Auxin) activities, phosphate solubilization bacteria and other bacterial richness compared to chemical fertilizer applied field soil.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46707602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-07DOI: 10.4236/jacen.2020.94021
F. Kaba, Mesfin Bibiso Doda, Camerun Kastro Kanido
Ginger (Zingiber officinale) is an important spice and medicinal plant used in different parts of the world. The objective of current study was to determine the level of essential and non-essential metals in ginger and its correlation with concentration of metals in the supporting soil. The level of K, Na, Ca, Mg, Mn, Fe, Zn, Cu, Co, Cd and Pb in soil and ginger cultivated in the selected districts of Wolaita zone, Southern Ethiopia were determined using flame atomic absorption spectrometry. A 0.5 g ginger sample was digested using a mixture of 4 ml HNO3 and 1.5 ml HClO4 at 210°C for 150 minutes, and a 0.5 g soil sample was digested employing a mixture of 6 ml aqua-regia and 1 ml H2O2 at 280°C for 150 minutes. The metal concentrations range in dry weight basis for ginger samples is decreasing in the order: K (1691 - 3487 mg/kg) > Mg (701 - 1583 mg/kg) > Ca (862 - 1476 mg/kg) > Na (398 - 776 mg/kg) > Mn (325 - 672 mg/kg) > Fe (6.14 - 11.92 mg/kg) > Zn (5.30 - 10.09 mg/kg) > (0.12 - 0.23 mg/kg) for Pb. The concentration of Cd, Cu and Co in ginger samples were below the limit of detection. The results revealed that ginger has the ability to accumulate relatively higher amounts of K and Mg among the determined essential metals. The soil samples have been found to be acidic pH, sandy clay loam in texture, a very low electrical conductivity and moderate level of (CEC, organic carbon, available phosphorus and total nitrogen). Although, a positive correlation between the levels of K, Mg, Zn, Mn in ginger and soil samples were observed. All the non-essential metals analyzed in this study were below the permissible ranges set by FAO/WHO.
姜(Zingiber officinale)是一种重要的香料和药用植物,在世界各地广泛使用。本研究的目的是确定生姜中必需和非必需金属的含量及其与支撑土壤中金属浓度的相关性。采用火焰原子吸收光谱法测定了埃塞俄比亚南部沃莱塔地区选定地区土壤和种植的生姜中的K、Na、Ca、Mg、Mn、Fe、Zn、Cu、Co、Cd和Pb含量。使用4 ml HNO3和1.5 ml HClO4的混合物在210℃下消化0.5 g生姜样品150分钟,使用6 ml王水和1 ml H2O2的混合物在280℃下消化0.5g土壤样品150分钟。生姜样品的干重金属浓度范围呈下降趋势,其顺序为:K(1691-3487 mg/kg)>mg(701-1583 mg/kg)>Ca(862-1476 mg/kg)>Na(398-776 mg/kg)>Mn(325-672 mg/kg)>Fe(6.14-11.92 mg/kg)>Zn(5.30-10.09 mg/kg)>Pb(0.12-0.23 mg/kg)。生姜样品中Cd、Cu和Co的含量均低于检测限。结果表明,在所测定的必需金属中,生姜具有相对较高量的K和Mg积累能力。土壤样品的pH值为酸性,质地为砂质粘壤土,电导率极低,(CEC、有机碳、有效磷和总氮)含量适中。尽管如此,生姜中的K、Mg、Zn、Mn水平与土壤样品呈正相关。本研究中分析的所有非必需金属均低于粮农组织/世界卫生组织设定的允许范围。
{"title":"Levels of Selected Essential and Non-Essential Metals in the Soil and Ginger (Zingiber officinale) Cultivated in Wolaita Zone, Ethiopia","authors":"F. Kaba, Mesfin Bibiso Doda, Camerun Kastro Kanido","doi":"10.4236/jacen.2020.94021","DOIUrl":"https://doi.org/10.4236/jacen.2020.94021","url":null,"abstract":"Ginger (Zingiber officinale) is an important spice and medicinal plant used in different parts of the world. The objective of current study was to determine the level of essential and non-essential metals in ginger and its correlation with concentration of metals in the supporting soil. The level of K, Na, Ca, Mg, Mn, Fe, Zn, Cu, Co, Cd and Pb in soil and ginger cultivated in the selected districts of Wolaita zone, Southern Ethiopia were determined using flame atomic absorption spectrometry. A 0.5 g ginger sample was digested using a mixture of 4 ml HNO3 and 1.5 ml HClO4 at 210°C for 150 minutes, and a 0.5 g soil sample was digested employing a mixture of 6 ml aqua-regia and 1 ml H2O2 at 280°C for 150 minutes. The metal concentrations range in dry weight basis for ginger samples is decreasing in the order: K (1691 - 3487 mg/kg) > Mg (701 - 1583 mg/kg) > Ca (862 - 1476 mg/kg) > Na (398 - 776 mg/kg) > Mn (325 - 672 mg/kg) > Fe (6.14 - 11.92 mg/kg) > Zn (5.30 - 10.09 mg/kg) > (0.12 - 0.23 mg/kg) for Pb. The concentration of Cd, Cu and Co in ginger samples were below the limit of detection. The results revealed that ginger has the ability to accumulate relatively higher amounts of K and Mg among the determined essential metals. The soil samples have been found to be acidic pH, sandy clay loam in texture, a very low electrical conductivity and moderate level of (CEC, organic carbon, available phosphorus and total nitrogen). Although, a positive correlation between the levels of K, Mg, Zn, Mn in ginger and soil samples were observed. All the non-essential metals analyzed in this study were below the permissible ranges set by FAO/WHO.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49053866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-07DOI: 10.4236/jacen.2020.94022
N. Ortiz, I. Azevedo, M. G. Vieira, F. Maichin, L. Nascimento
Reliable data of antibiotic use and environmental discharge as veterinary medicine are essential to help countries raise awareness of the appropriate use, control, and correct water release. The first approach is to change the regulatory framework based on consuming information, use policy, and discharge laws. The important research contribution is a novel water treatment process to treat, remove, and reduce antibiotic concentration in discharged water, mainly those used in the animal protein industry. The low particle biochar added during the titanium isopropoxide hydrolysis reduces the titanium dioxide (TiO2) agglomerates and promotes the adsorption surface process. Such improved catalyst material enhances the solar decomposition efficiency to 93% from original oxytetracycline with better correspondence with the Elovich kinetics, intraparticle diffusion, R-P isotherm, and Langmuir-Hinshelwood model.
{"title":"Oxytetracycline Water Contamination Treated with Biocarbon TiO2 and Solar Photodecomposition","authors":"N. Ortiz, I. Azevedo, M. G. Vieira, F. Maichin, L. Nascimento","doi":"10.4236/jacen.2020.94022","DOIUrl":"https://doi.org/10.4236/jacen.2020.94022","url":null,"abstract":"Reliable data of antibiotic use and environmental discharge as veterinary medicine are essential to help countries raise awareness of the appropriate use, control, and correct water release. The first approach is to change the regulatory framework based on consuming information, use policy, and discharge laws. The important research contribution is a novel water treatment process to treat, remove, and reduce antibiotic concentration in discharged water, mainly those used in the animal protein industry. The low particle biochar added during the titanium isopropoxide hydrolysis reduces the titanium dioxide (TiO2) agglomerates and promotes the adsorption surface process. Such improved catalyst material enhances the solar decomposition efficiency to 93% from original oxytetracycline with better correspondence with the Elovich kinetics, intraparticle diffusion, R-P isotherm, and Langmuir-Hinshelwood model.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42959717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93008
D. Blank, Gabriela Hörnke Alves, P. S. Nascente, R. Freitag, M. Cleff
Origanum vulgare L. (oregano) and Rosmarinus officinalis L. (rosemary) are vegetal species belonging to the family Lamiaceae, popularly known as oregano and rosemary. Aromatic plants are used in the treatment and prevention of diseases and in the culinary as functional food in the preparation and conservation of foods. In the chemical composition of oregano and rosemary are present bioactive compounds with antimicrobial, antioxidant and flavoring effect. Several reports in the literature have presented the chemical composition and biological activity of the essential oils of oregano and rosemary. However, few studies have been carried out regarding the chemical composition and biological potential of the aqueous and ethanolic extracts of Origanum vulgare L. and Rosmarinus officinalis L. Evidencing a need to investigate the chemical composition and antifungal activity of these extracts. The objective of the study was to evaluate the bioactive compounds and antifungal activity of the aqueous and ethanolic extract of Origanum vulgare L. and Rosmarinus officinalis L. The aqueous and ethanolic extracts of Origanum vulgare L. and Rosmarinus officinalis L. present in the chemical composition phenolic acids and flavonoids. The antifungal test of the aqueous and ethanolic extract of Origanum vulgare L. and Rosmarinus officinalis L. presented antifungal potential against Candida globosa, Cryptococcus laurentii, Trichosporum assai, Rhodotorula sp., Candida albicans, Kodamaea ohmeri, Saccharomyces and Geotrichum. According to the results obtained in this study, it was concluded that the ethanolic extract of oregano and rosemary present antifungal activity against several yeasts tested, thus proving that these plant species must be carefully evaluated, aiming at a potential for use as an antimicrobial agent.
{"title":"Bioactive Compounds and Antifungal Activities of Extracts of Lamiaceae Species","authors":"D. Blank, Gabriela Hörnke Alves, P. S. Nascente, R. Freitag, M. Cleff","doi":"10.4236/jacen.2020.93008","DOIUrl":"https://doi.org/10.4236/jacen.2020.93008","url":null,"abstract":"Origanum vulgare L. (oregano) and Rosmarinus officinalis L. (rosemary) are vegetal species belonging to the \u0000family Lamiaceae, popularly known as oregano and rosemary. Aromatic plants are used in the treatment and prevention of diseases and in the culinary as \u0000functional food in the preparation and conservation of foods. In the chemical \u0000composition of oregano and rosemary are present bioactive compounds with \u0000antimicrobial, antioxidant and flavoring effect. Several reports in the \u0000literature have presented the chemical composition and biological activity of \u0000the essential oils of oregano and rosemary. However, few studies have been \u0000carried out regarding the chemical composition and biological potential of the \u0000aqueous and ethanolic extracts of Origanum vulgare L. and Rosmarinus officinalis L. \u0000Evidencing a need to investigate the chemical composition and antifungal \u0000activity of these extracts. The objective of \u0000the study was to evaluate the bioactive compounds and antifungal activity of \u0000the aqueous and ethanolic extract of Origanum vulgare L. and Rosmarinus officinalis L. The aqueous and ethanolic extracts of Origanum vulgare L. and Rosmarinus officinalis L. present in the \u0000chemical composition phenolic acids and flavonoids. The antifungal test of the \u0000aqueous and ethanolic extract of Origanum vulgare L. and Rosmarinus officinalis L. presented antifungal \u0000potential against Candida globosa, Cryptococcus laurentii, Trichosporum assai, Rhodotorula sp., Candida albicans, Kodamaea ohmeri, Saccharomyces and Geotrichum. \u0000According to the results obtained in this study, it was concluded that the \u0000ethanolic extract of oregano and rosemary present antifungal activity against \u0000several yeasts tested, thus proving that these plant species must be carefully \u0000evaluated, aiming at a potential for use as an antimicrobial agent.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":"09 1","pages":"85-96"},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48716553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93015
Niel L. Ningal
The study aimed to explore the potential of dietary fats supplementation on the overall goat performance. Three (3) mature rumen-cannulated goats weighting 27.33 ± 1.53 kg housed in individual elevated metabolism stalls with customized fecal and urine collection tools with treatments replicated three times over time following the Complete Randomized Design (CRD). Animals were randomly selected on different dietary treatment at different cycle. For each cycle, animals were provided with 30% concentrate on the morning based on feed requirements {3% of their body weight (BW) dry matter (DM) basis} of the animals. Ad libitum feeding of Napier grass will follow thereafter. Clean drinking water were made available all the times in the respective animal watering troughs. The rumen-cannulated goats were supplemented with different levels of two dietary fats (VCO and Lard) with dietary treatment combinations as follows, Control and VCO and Lard at 3% & 5%. Degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were collected sequentially in every cycle of the study. There were seven (7) days lag period in every cycle for the animals to return to each natural state. On the 8th day of every cycle, animals were given different dietary treatment. Sequential insertion of nylon bag was done on the 15th to 16th day (7 days after treatment). The results showed that degradability of the dry matter (DM) was noticed degraded exponentially on the first twelve hours of incubation and slower down in the next few hours until 48 hours. Crude protein, acid and neutral detergent fiber showed breakdown of components was observed in the first 48 hours of incubation. No significant difference (P > 0.05) among treatment means was observed in all parameters gathered. This implies that mature female goat diet cannot be influenced by dietary fats from two different sources (VCO and Lard) at 3% to 5% supplementation. Based on the study conducted, dietary fats supplementation on goats such as VCO and lard given at the maximum level of 5% level did not influence the nutrient degradability of Napier grass in the rumen until it reaches at 48 hours of incubation. Supplementing ruminant diets with dietary fat in goats could increase the energy density of the animal’s diet without adverse effect on rumen degradability. This simple, easy, and basic technique could also be applied to other animal species in pursuit of finding ways to formulate indigenous feedstuff materials that have potential nutritive values. Given the limitations such as the climatic and environmental constraints, this particular study would somehow serve as benchmark in conducting related researches in optimizing the conditions with respect to animal nutrition and feedstuff utilization. Thus, this study was done to augment productivity and to provide new opportunities for achieving enhanced growth performance in a way that
{"title":"Napier Grass Rumen Degradability in Sacco in Goats (Capra hircus aegagrus) Supplemented with Different Sources and Amount of Dietary Fats","authors":"Niel L. Ningal","doi":"10.4236/jacen.2020.93015","DOIUrl":"https://doi.org/10.4236/jacen.2020.93015","url":null,"abstract":"The study aimed to explore the potential of dietary fats supplementation \u0000on the overall goat performance. Three (3) mature rumen-cannulated goats \u0000weighting 27.33 ± 1.53 kg housed in individual elevated metabolism stalls with \u0000customized fecal and urine collection tools with treatments replicated three \u0000times over time following the Complete Randomized Design (CRD). Animals were randomly selected on \u0000different dietary treatment at different cycle. For each cycle, animals were \u0000provided with 30% concentrate on the morning based on feed requirements {3% of \u0000their body weight (BW) dry matter (DM) basis} of the animals. Ad libitum \u0000feeding of Napier grass will follow thereafter. Clean drinking water were made \u0000available all the times in the respective animal watering troughs. The \u0000rumen-cannulated goats were supplemented with different levels of two dietary \u0000fats (VCO and Lard) with dietary treatment combinations as follows, Control and \u0000VCO and Lard at 3% & 5%. Degradability of dry matter (DM), crude protein \u0000(CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were \u0000collected sequentially in every cycle of the study. There were seven (7) days \u0000lag period in every cycle for the animals to return to each natural state. On \u0000the 8th day of every cycle, animals were given different dietary treatment. \u0000Sequential insertion of nylon bag was done on the 15th to 16th day (7 days after \u0000treatment). The results showed that degradability of the dry matter (DM) was \u0000noticed degraded exponentially on the first twelve hours of incubation and \u0000slower down in the \u0000next few hours until 48 hours. Crude protein, acid and neutral detergent fiber \u0000showed breakdown of components was observed in the first 48 hours of incubation. No significant \u0000difference (P > 0.05) among treatment means was observed in all parameters \u0000gathered. This implies that mature female goat diet cannot be influenced by \u0000dietary fats from two different sources (VCO and Lard) at 3% to 5% \u0000supplementation. Based on the study conducted, dietary fats supplementation on \u0000goats such as VCO and lard given at the maximum level of 5% level did not \u0000influence the nutrient degradability of Napier grass in the rumen until it reaches \u0000at 48 hours of incubation. Supplementing ruminant diets with dietary fat in \u0000goats could increase the energy density of the animal’s diet without adverse \u0000effect on rumen degradability. This simple, easy, and basic technique could \u0000also be applied to other animal species in pursuit of finding ways to formulate indigenous feedstuff \u0000materials that have potential nutritive values. Given the limitations such as \u0000the climatic and environmental constraints, this particular study would somehow \u0000serve as benchmark in conducting related researches in optimizing the \u0000conditions with respect to animal nutrition and feedstuff utilization. Thus, \u0000this study was done to augment productivity and to provide new opportunities \u0000for achieving enhanced growth performance in a way that","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":"9 1","pages":"177-194"},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46050655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93014
Pitchayapa Pholkaw, Quoc Thinh Tran, Takamitsu Kai, Taiki Kawagoe, K. Kubota, Kiwako S. Araki, M. Kubo
Soil samples from 139 agricultural orchard fields (apple, grape, tea, and others) were analyzed using the soil fertility index. From these samples, an orchard field database was constructed and the soil properties between orchard, upland, and paddy fields were compared. The average value of bacterial biomass in the orchard fields was 7.4 × 108 cells/g-soil, ranging from not detected (lower than 6.6 × 106 cells/g-soil) to 7.7 × 109 cells/g-soil. The average values of total carbon (TC), total nitrogen (TN), total phosphorus (TP), and total potassium (TK), were 24,000 mg/kg (2670 to 128,100 mg/kg), 1460 mg/kg (133 to 6400 mg/kg), 1030 mg/kg (142 to 5362 mg/kg), and 5370 mg/kg (1214 to 18,155 mg/kg), respectively. The C/N and C/P ratios were 19 (3 to 85) and 27 (2 to 101), respectively. Soil properties of the orchard fields were compared with those of the upland and the paddy fields. The average value of bacterial biomass in the orchard fields was almost the same as that in the upland fields (8.0 × 108 cells/g-soil), but the number was lower than that in the paddy fields (12.9 × 108 cells/g-soil). The average values of TC and TN in the orchard fields fell between those in the upland fields (TC: 33,120 mg/kg, TN: 2010 mg/kg) and the paddy fields (TC: 15,420 mg/kg, TN: 1080 mg/kg). The relationship between the bacterial biomass and TC in the orchard fields resembled that in the upland fields. A suitable soil condition for the orchard fields was determined as TC: ≥25,000 mg/kg, TN: ≥1500 mg/kg, TP: ≥900 mg/kg and TK: 2500 - 10,000 mg/kg. These recommended values will be effective for the improvement of the soil quality in the orchard fields by enhancing the number and activities of microorganisms.
{"title":"Characterization of Orchard Fields Based on Soil Fertility Index (SOFIX)","authors":"Pitchayapa Pholkaw, Quoc Thinh Tran, Takamitsu Kai, Taiki Kawagoe, K. Kubota, Kiwako S. Araki, M. Kubo","doi":"10.4236/jacen.2020.93014","DOIUrl":"https://doi.org/10.4236/jacen.2020.93014","url":null,"abstract":"Soil samples from 139 agricultural orchard fields (apple, grape, tea, and \u0000others) were analyzed using the soil fertility index. From these samples, an orchard \u0000field database was constructed and the soil properties between orchard, upland, \u0000and paddy fields were compared. The average value of bacterial biomass in the orchard fields \u0000was 7.4 × 108 cells/g-soil, ranging from not detected (lower than \u00006.6 × 106 cells/g-soil) to 7.7 × 109 cells/g-soil. The \u0000average values of total carbon (TC), total nitrogen (TN), total phosphorus \u0000(TP), and total potassium (TK), were 24,000 mg/kg (2670 to 128,100 mg/kg), 1460 \u0000mg/kg (133 to 6400 mg/kg), 1030 mg/kg (142 to 5362 mg/kg), and 5370 mg/kg (1214 \u0000to 18,155 mg/kg), respectively. The C/N and C/P ratios were 19 (3 to 85) and 27 \u0000(2 to 101), respectively. Soil properties of the orchard fields were compared \u0000with those of the upland and the paddy fields. The average value of bacterial \u0000biomass in the orchard fields was almost the same as that in the upland fields \u0000(8.0 × 108 cells/g-soil), but the number was lower than that in the \u0000paddy fields (12.9 × 108 cells/g-soil). The average values of TC and \u0000TN in the orchard fields fell between those in the upland fields (TC: 33,120 \u0000mg/kg, TN: 2010 mg/kg) and the paddy fields (TC: 15,420 mg/kg, TN: 1080 mg/kg). The relationship \u0000between the bacterial biomass and TC in the orchard fields resembled that in \u0000the upland fields. A suitable soil condition for the orchard fields was \u0000determined as TC: ≥25,000 mg/kg, TN: ≥1500 mg/kg, TP: ≥900 mg/kg and TK: 2500 - \u000010,000 mg/kg. These \u0000recommended values will be effective for the improvement of the soil quality in \u0000the orchard fields by enhancing the number and activities of microorganisms.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":"09 1","pages":"159-176"},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49268267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93011
Takamitsu Kai, Shunya Nishimori, M. Tamaki
Tomatoes in Japan are generally cultivated under management systems that use chemical fertilizers and synthetic chemical pesticides. However, the continuous use of these fertilizers and pesticides damages the soil environment and reduces the number of soil microorganisms. Organic farming has a relatively low environmental impact compared to conventional farming techniques, but typically has lower and more unstable yields. In this study, we investigated the effect of organic and chemical fertilizer application on growth, yield, and quality of small-sized (cherry) tomatoes. Cherry tomatoes were cultivated using organic and chemical organic fertilizers. Average weight and lateral diameter were significantly higher under organic fertilizer than under chemical fertilizer. In addition, shoot dry weight was significantly higher under organic fertilizer than chemical fertilizer. Lycopene content was significantly higher under organic fertilizer than chemical fertilizer. The total carbon (TC), total phosphorus (TP), total potassium (TK), available phosphoric (SP) and exchangeable potassium (SK) contents, C/N ratio, and pH were significantly higher under organic fertilizer than chemical fertilizer. Bacterial biomass, nitrite (NO? 2-N) oxidation activity, nitrification (N) circulation activity, and phosphoric (P) circulation were higher under organic fertilizer than chemical fertilizer. From these results, the study indicates that appropriate controls such as TC, total nitrogen (TN), and C/N ratio of organic fertilizer increased microbial biomass and enhanced nutrient circulation such as N circulation activity and P circulation activity. These results can be used to improve current organic farming practices and promote soil conservation.
{"title":"Effect of Organic and Chemical Fertilizer Application on Growth, Yield, and Quality of Small-Sized Tomatoes","authors":"Takamitsu Kai, Shunya Nishimori, M. Tamaki","doi":"10.4236/jacen.2020.93011","DOIUrl":"https://doi.org/10.4236/jacen.2020.93011","url":null,"abstract":"Tomatoes in Japan are generally cultivated under management systems that \u0000use chemical fertilizers and synthetic chemical pesticides. However, the \u0000continuous use of these fertilizers and pesticides damages the soil environment \u0000and reduces the number of soil microorganisms. Organic farming has a relatively \u0000low environmental impact compared to conventional farming techniques, but \u0000typically has lower and more unstable yields. In this study, we investigated \u0000the effect of organic and chemical fertilizer application on growth, yield, and \u0000quality of small-sized (cherry) tomatoes. Cherry tomatoes were cultivated using \u0000organic and chemical organic fertilizers. Average weight and lateral diameter \u0000were significantly higher under organic fertilizer than under chemical \u0000fertilizer. In addition, shoot dry weight was significantly higher under \u0000organic fertilizer than chemical fertilizer. Lycopene content was significantly \u0000higher under organic fertilizer than chemical fertilizer. The total carbon \u0000(TC), total phosphorus (TP), total potassium (TK), available phosphoric (SP) \u0000and exchangeable potassium (SK) contents, C/N ratio, and pH were significantly \u0000higher under organic fertilizer than chemical fertilizer. Bacterial biomass, \u0000nitrite (NO? 2-N) \u0000oxidation activity, nitrification (N) circulation activity, and phosphoric (P) \u0000circulation were higher under organic fertilizer than chemical fertilizer. From \u0000these results, the study indicates that appropriate controls such as TC, total \u0000nitrogen (TN), and C/N ratio of organic fertilizer increased microbial biomass \u0000and enhanced nutrient circulation such as N circulation activity and P \u0000circulation activity. These results can be used to \u0000improve current organic farming practices and promote soil conservation.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":"9 1","pages":"121-133"},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41878719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93012
Takamitsu Kai, M. Kubo
Apples in Japan are generally cultivated under management systems that use chemical fertilizers and synthetic chemical pesticides. However, the continuous use of these fertilizers and pesticides damages the soil environment and reduces the number of soil microorganisms. In this study, we compared the chemical and biological properties of 12 soils from apple orchards in Aomori and Nagano Prefectures under four types of management systems, namely, natural conditions, with no cultivation, fertilizers, or pesticides; organic farming methods, using organic materials and pesticides approved by the Japanese Agricultural Standard organic certification system; hybrid farming methods, using a mix of organic and chemical fertilizers; and conventional farming, using chemical fertilizers and pesticides. Soil total carbon (TC), total nitrogen (TN), total phosphorus (TP), nitrate-nitrogen (NO? 3), and available phosphoric acid (SP) contents were generally found to be the highest where organic farming methods were used. Similarly, bacterial biomass, nitrification (N) circulation activity, ammonia (NH+ 4) oxidation activity, nitrite (NO? 2) oxidation activity, and phosphoric (P) circulation activity were the highest under organic farming, especially in comparison with conventional farming. This study indicated that the differences in apple sugar content, acidity, and sugar/acidity ratio between different orchard management systems were due to different soil conditions, and soil conditions under organic farming management system in apple cultivation increased bacterial biomass while enhancing N and P circulation activity and high TC. On the other hand, the soil of conventional farming has the lowest total number of bacterial biomass and lowest material cycle such as N and P circulation activity. Analysis of the chemical and biological properties of these orchard soils indicated that soil conditions under organic farming management are the most suitable for increasing microbial numbers and enhancing N and P circulation activity.
{"title":"Chemical and Biological Properties of Apple Orchard Soils under Natural, Organic, Hybrid, and Conventional Farming Methods","authors":"Takamitsu Kai, M. Kubo","doi":"10.4236/jacen.2020.93012","DOIUrl":"https://doi.org/10.4236/jacen.2020.93012","url":null,"abstract":"Apples in Japan are \u0000generally cultivated under management systems that use chemical fertilizers and \u0000synthetic chemical pesticides. However, the continuous use of these fertilizers \u0000and pesticides damages the soil environment and reduces the number of soil \u0000microorganisms. In this study, we compared the chemical and biological \u0000properties of 12 soils from apple orchards in Aomori and Nagano Prefectures \u0000under four types of management systems, namely, natural conditions, with no \u0000cultivation, fertilizers, or pesticides; organic farming methods, using \u0000organic materials and pesticides approved by the Japanese Agricultural \u0000Standard organic certification system; hybrid farming methods, using a mix of \u0000organic and chemical fertilizers; and conventional farming, using chemical \u0000fertilizers and pesticides. Soil total carbon (TC), total nitrogen (TN), total \u0000phosphorus (TP), nitrate-nitrogen (NO? 3), and available phosphoric acid \u0000(SP) contents were generally found to be the highest where organic farming \u0000methods were used. Similarly, bacterial biomass, nitrification (N) circulation \u0000activity, ammonia (NH+ \u00004) oxidation activity, nitrite (NO? 2) oxidation activity, and phosphoric \u0000(P) circulation activity were the highest under organic farming, especially in \u0000comparison with conventional farming. This study indicated that the differences \u0000in apple sugar content, acidity, and sugar/acidity ratio between different orchard \u0000management systems were due to different soil conditions, and soil conditions \u0000under organic farming management system in apple cultivation increased bacterial \u0000biomass while enhancing N and P circulation activity and high TC. On the other \u0000hand, the soil of conventional farming has the lowest total number of bacterial \u0000biomass and lowest material cycle such as N and P circulation activity. Analysis of the chemical and biological \u0000properties of these orchard soils indicated that soil conditions under organic \u0000farming management are the most suitable for increasing microbial numbers and \u0000enhancing N and P circulation activity.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45005288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-06DOI: 10.4236/jacen.2020.93010
Takamitsu Kai, Yuuki Okamoto, S. Murakami, M. Tamaki
Oil contamination of the soil by petroleum products has become an enormous environmental problem. In this study, we examined whether remediation of oil-contaminated soils by cultivating three flowering plants (Mimosa, Gazania, and Zinnia) could be enhanced by inoculation with Acinetobacter junii strain M-2 at different plant growth stages (at sowing, at early growth, and at mid-growth). The growth of Zinnia cultivated in oil-contaminated soils inoculated at sowing was significantly superior to that in the non-inoculated soil. Although total petroleum hydrocarbon concentrations in soils inoculated at sowing were nominally lower than those in non-inoculated soils, especially in the case of Zinnia planting, the effect did not reach statistical significance. However, dehydrogenase activity was significantly higher in the soils inoculated with A. junii strain M-2 than in non-inoculated soils for all three plant species tested. These results demonstrate that a combination of ornamental plant cultivation (particularly Zinnia) and inoculation with A. junii strain M-2 increases the efficiency of oil-contaminated soil phytoremediation.
{"title":"Phytoremediation of Oil-Contaminated Soils by Combining Flowering Plant Cultivation and Inoculation with Acinetobacter junii Strain M-2","authors":"Takamitsu Kai, Yuuki Okamoto, S. Murakami, M. Tamaki","doi":"10.4236/jacen.2020.93010","DOIUrl":"https://doi.org/10.4236/jacen.2020.93010","url":null,"abstract":"Oil contamination of the soil by petroleum products has become an \u0000enormous environmental problem. In this study, we examined whether remediation \u0000of oil-contaminated soils by cultivating three flowering plants (Mimosa, \u0000Gazania, and Zinnia) could be enhanced by inoculation with Acinetobacter junii strain M-2 at different plant growth stages (at \u0000sowing, at early growth, and at mid-growth). The growth of Zinnia cultivated in \u0000oil-contaminated soils inoculated at sowing was significantly superior to that \u0000in the non-inoculated soil. Although total petroleum hydrocarbon concentrations \u0000in soils inoculated at sowing were nominally lower than those in non-inoculated \u0000soils, especially in the case of Zinnia planting, the effect did not reach \u0000statistical significance. However, dehydrogenase activity was significantly \u0000higher in the soils inoculated with A. junii strain M-2 than in \u0000non-inoculated soils for all three plant species tested. These results \u0000demonstrate that a combination of ornamental plant cultivation (particularly \u0000Zinnia) and inoculation with A. junii strain M-2 increases the efficiency of oil-contaminated soil phytoremediation.","PeriodicalId":68148,"journal":{"name":"农业化学和环境(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48423871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}