Pub Date : 2021-03-25DOI: 10.30486/IJROWA.2021.1902019.1087
S.V.Vi mal, G. Chattopadhyay, K. Chakrabarti
Purpose This study was carried out to assess the effect of integrating microbiological fortification with vermicomposting process on biofertilizing quality of vermicompost as well as improvement of the availability of nitrogen and phosphorus in the product. Method A mixture of cow dung and vegetable market waste (1:1) was used for vermicomposting with Eisenia foetida as the decomposer earthworm @ 10 no.of worm kg-1 substrate. Nitrogen fixing and phosphate solubilizing bacteria (NFB and PSB)Azotobacter chroococcum and Pseudomonas fluorescens were integrated with this composting process at varying doses viz. 0,5 and 10 g kg-1 substrate under different combinations. Changes in the population of these two bio-fertilizing microorganisms and the availability of relevant nutrients in the substrates were monitored periodically to assess the behaviors of these microorganisms and their effects on the produced vermicompost. Results All the inoculations resulted in substantial increments in population of both NFB and PSB over the control. However, the increments were more prominent for NFB than the PSB. Significant increments in the amount of mineralized nitrogen and solubilized phosphate over the control were observed in almost all the treatment combinations. Conclusion Integration of nitrogen fixing and phosphate solubilizing bacteria with vermicomposting process resulted in substantial enrichment of the product. This benefit was observed not only in terms of increased availability of the two major plant nutrients of concern viz. N and P, but also in significant improvement in the population of the inoculated microorganisms turning the product into a potential source of bio-fertilizers.
目的评价微生物强化与蚯蚓堆肥工艺相结合对蚯蚓堆肥生物肥料品质及提高产品氮磷有效性的影响。方法采用牛粪与菜市场垃圾按1:1比例混合进行蚯蚓堆肥，腐熟爱森虫为分解者，蚯蚓@ 10号。蠕虫kg-1基质。固氮和增磷细菌(NFB和PSB)、绿球菌固氮细菌和荧光假单胞菌在不同组合下以不同剂量(0、5和10 g kg-1底物)加入堆肥过程。定期监测这两种生物施肥微生物的种群变化和基质中相关营养物质的有效性，以评估这些微生物的行为及其对产生的蚯蚓堆肥的影响。结果所有接种均导致NFB和PSB的种群数量较对照组显著增加。然而，与PSB相比，NFB的增量更为显著。在几乎所有的处理组合中，矿化氮和溶解磷酸盐的量都比对照显著增加。结论固氮溶磷菌与蚯蚓堆肥工艺相结合，可使产物大量富集。这种益处不仅体现在两种主要植物营养物质(氮和磷)的可用性增加，而且还体现在接种微生物种群的显著改善，使产品成为生物肥料的潜在来源。
{"title":"Microbiological integration for qualitative improvement of vermicompost","authors":"S.V.Vi mal, G. Chattopadhyay, K. Chakrabarti","doi":"10.30486/IJROWA.2021.1902019.1087","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1902019.1087","url":null,"abstract":"Purpose This study was carried out to assess the effect of integrating microbiological fortification with vermicomposting process on biofertilizing quality of vermicompost as well as improvement of the availability of nitrogen and phosphorus in the product. \u0000Method A mixture of cow dung and vegetable market waste (1:1) was used for vermicomposting with Eisenia foetida as the decomposer earthworm @ 10 no.of worm kg-1 substrate. Nitrogen fixing and phosphate solubilizing bacteria (NFB and PSB)Azotobacter chroococcum and Pseudomonas fluorescens were integrated with this composting process at varying doses viz. 0,5 and 10 g kg-1 substrate under different combinations. Changes in the population of these two bio-fertilizing microorganisms and the availability of relevant nutrients in the substrates were monitored periodically to assess the behaviors of these microorganisms and their effects on the produced vermicompost. \u0000Results All the inoculations resulted in substantial increments in population of both NFB and PSB over the control. However, the increments were more prominent for NFB than the PSB. Significant increments in the amount of mineralized nitrogen and solubilized phosphate over the control were observed in almost all the treatment combinations. \u0000Conclusion Integration of nitrogen fixing and phosphate solubilizing bacteria with vermicomposting process resulted in substantial enrichment of the product. This benefit was observed not only in terms of increased availability of the two major plant nutrients of concern viz. N and P, but also in significant improvement in the population of the inoculated microorganisms turning the product into a potential source of bio-fertilizers.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89310112","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 : 2021-03-01DOI: 10.30486/IJROWA.2020.1893432.1039
Parastoo Sharifi, M. Shorafa, M. Mohammadi
Purpose Soil salinity and sodicity are among the factors involved in soil degradation, especially in arid and semi-arid areas of the world. The use of modifiers, including organic matters, can be considered as an appropriate strategy to improve the fertility of saline-sodic soils. Method In this study, saline-sodic control soil was collected from Karaj and mixed with three levels of 1%, 3% and 5% of cow manure, vermicompost and Azolla. The soil columns were then incubated at 20 °C and field capacity moisture for 5 months. The physical and chemical properties of the treatments were evaluated before and after incubation. Results After the incubation period, the lowest salinity level was observed in 5% Azolla and vermicompost treatments. The highest amount of change in sodium absorption ratio was related to 5% cow manure treatment. There was an insignificant difference in moisture levels in a given suction among the different treatments. After the incubation period, salinity and sodium absorption decreased and increased in most of the treatments, respectively. Moreover, the decrease of saturation dehydration coefficient in the treatments revealed the disruption of soil structure and conversion of large pores to fine grains as a result of adding the mentioned organic matters. Conclusion According to the results, cow manure at 1% level had no significant effect on soil properties. However, at higher levels, it had a negative effect on quality and conditions of the saline-sodic soil in terms of physical and chemical properties. In contrast, Azolla and vermicompost fertilizers at 5% proved to be suitable for correcting the saline-sodic soil.
{"title":"Investigating the effects of cow manure, vermicompost and Azolla fertilizers on hydraulic properties of saline-sodic soils","authors":"Parastoo Sharifi, M. Shorafa, M. Mohammadi","doi":"10.30486/IJROWA.2020.1893432.1039","DOIUrl":"https://doi.org/10.30486/IJROWA.2020.1893432.1039","url":null,"abstract":"Purpose Soil salinity and sodicity are among the factors involved in soil degradation, especially in arid and semi-arid areas of the world. The use of modifiers, including organic matters, can be considered as an appropriate strategy to improve the fertility of saline-sodic soils. \u0000Method In this study, saline-sodic control soil was collected from Karaj and mixed with three levels of 1%, 3% and 5% of cow manure, vermicompost and Azolla. The soil columns were then incubated at 20 °C and field capacity moisture for 5 months. The physical and chemical properties of the treatments were evaluated before and after incubation. \u0000Results After the incubation period, the lowest salinity level was observed in 5% Azolla and vermicompost treatments. The highest amount of change in sodium absorption ratio was related to 5% cow manure treatment. There was an insignificant difference in moisture levels in a given suction among the different treatments. After the incubation period, salinity and sodium absorption decreased and increased in most of the treatments, respectively. Moreover, the decrease of saturation dehydration coefficient in the treatments revealed the disruption of soil structure and conversion of large pores to fine grains as a result of adding the mentioned organic matters. \u0000Conclusion According to the results, cow manure at 1% level had no significant effect on soil properties. However, at higher levels, it had a negative effect on quality and conditions of the saline-sodic soil in terms of physical and chemical properties. In contrast, Azolla and vermicompost fertilizers at 5% proved to be suitable for correcting the saline-sodic soil.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76667371","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 : 2021-03-01DOI: 10.30486/IJROWA.2021.1899077.1068
Md. Nousad Hossain, T. Roy, M. Mostofa
Purpose Bangladesh is an agriculture-based country, where about 3 million ha is covered by groundwater sources for irrigation, but a significant portion of irrigation water is Arsenic contaminated. To produce Potato under Arsenic contaminated soil, an experiment was conducted to find out the effect of sawdust as an adsorbent to decontaminate Arsenic toxicity in soil. Method The research was conducted in pot experiment. It consisted of two factors. Factor A: Arsenic levels (4) viz., As0: control (0 mg/kgsoil), As1: 25 mg/kg soil, As2: 50 mg/kg soil, and As3: 75 mg/kg soil. Factor B: Sawdust levels (4) viz., S0: control (0 g/kg soil), S1: 10 g/kg soil, S2: 50 g/kg soil, and S3: 100 g/kg soil. Results Arsenic content in Potato tuber peel and flesh gradually increased with the increase of Arsenic levels. As3 was found for the highest accumulation of Arsenic in tuber peel (3.867 mg/kgfresh weight) and flesh (0.6236 mg/kgfresh weight). Arsenic content in both peel and flesh of Potato tuber decreased with increasing sawdust levels. The soil treated with S3 reduced 86.41% and 51.44% Arsenic accumulation from tuber peel and flesh, respectively, compared to control (S0). Potato produced from the treatment As1S1 accumulated a lower amount of Arsenic (0.15 mg/kgfresh weight) in Potato flesh compared to those of other treatments. Conclusion Therefore, Potato growers can produce Potato in 25 mg/kg Arsenic contaminated soil treated with 10 g sawdust/kg soil, which contains a minimum than the critical level of Arsenic for human consumption.
{"title":"Sawdust as an ameliorant to decontaminate Arsenic in potato soils","authors":"Md. Nousad Hossain, T. Roy, M. Mostofa","doi":"10.30486/IJROWA.2021.1899077.1068","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1899077.1068","url":null,"abstract":"Purpose Bangladesh is an agriculture-based country, where about 3 million ha is covered by groundwater sources for irrigation, but a significant portion of irrigation water is Arsenic contaminated. To produce Potato under Arsenic contaminated soil, an experiment was conducted to find out the effect of sawdust as an adsorbent to decontaminate Arsenic toxicity in soil. Method The research was conducted in pot experiment. It consisted of two factors. Factor A: Arsenic levels (4) viz., As0: control (0 mg/kgsoil), As1: 25 mg/kg soil, As2: 50 mg/kg soil, and As3: 75 mg/kg soil. Factor B: Sawdust levels (4) viz., S0: control (0 g/kg soil), S1: 10 g/kg soil, S2: 50 g/kg soil, and S3: 100 g/kg soil. Results Arsenic content in Potato tuber peel and flesh gradually increased with the increase of Arsenic levels. As3 was found for the highest accumulation of Arsenic in tuber peel (3.867 mg/kgfresh weight) and flesh (0.6236 mg/kgfresh weight). Arsenic content in both peel and flesh of Potato tuber decreased with increasing sawdust levels. The soil treated with S3 reduced 86.41% and 51.44% Arsenic accumulation from tuber peel and flesh, respectively, compared to control (S0). Potato produced from the treatment As1S1 accumulated a lower amount of Arsenic (0.15 mg/kgfresh weight) in Potato flesh compared to those of other treatments. Conclusion Therefore, Potato growers can produce Potato in 25 mg/kg Arsenic contaminated soil treated with 10 g sawdust/kg soil, which contains a minimum than the critical level of Arsenic for human consumption.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83105669","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 : 2021-03-01DOI: 10.30486/IJROWA.2021.1896960.1051
Guilherme Wilbert Ferreira, Lucas Benedet, T. Trapp, A. P. Lima, V. M. Junior, A. Loss, C. R. Lourenzi, J. J. Comin
Purpose The objective was to evaluate the effects of mineral fertilizers and swine manure fertilization on soil aggregation indexes and on chemical and physical attributes of aggregates in Typic Hapludult managed under minimum tillage system. Method Experiment was implemented in 2013, in southern Brazil. The treatments were control, mineral fertilization (MF), swine manure compost + MF (SMC+MF); pig slurry + MF (PS+MF); PS to supply N for maize and black oat (PS100). In May 2015 and 2016, undisturbed soil samples were collected to obtain soil aggregates. Aggregates stability was evaluated through the mean weight diameter (MWD) and mean geometric diameter (MGD) indexes and aggregate distribution by diameter classes. In macroaggregates, total organic carbon (TOC), total nitrogen (TN), clay flocculation degree (CF%) and ∆pH were evaluated. Results The use of swine manure, associated or not to MF, increases TOC and TN contents in soil aggregates in 67.02 and 125.87%, respectively, for SMC+MF treatment. However, it was not efficient in improving soil physical attributes, reducing soil aggregation indexes, mainly in the 5-10 cm layer, by the decreased values of MWD and MGD. This result corroborates with the increase in microaggregates in all treatments. This was a result of the negative ∆pH values and the increased CF%. Conclusion Despite the increase in organic matter contents observed in this study, this was not enough to guarantee an improvement in soil physical attributes over 4 years. These results show that management must be supported by several conservationist techniques in order to have soil quality.
{"title":"Soil aggregation indexes and chemical and physical attributes of aggregates in a Typic Hapludult fertilized with swine manure and mineral fertilizer","authors":"Guilherme Wilbert Ferreira, Lucas Benedet, T. Trapp, A. P. Lima, V. M. Junior, A. Loss, C. R. Lourenzi, J. J. Comin","doi":"10.30486/IJROWA.2021.1896960.1051","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1896960.1051","url":null,"abstract":"Purpose The objective was to evaluate the effects of mineral fertilizers and swine manure fertilization on soil aggregation indexes and on chemical and physical attributes of aggregates in Typic Hapludult managed under minimum tillage system. Method Experiment was implemented in 2013, in southern Brazil. The treatments were control, mineral fertilization (MF), swine manure compost + MF (SMC+MF); pig slurry + MF (PS+MF); PS to supply N for maize and black oat (PS100). In May 2015 and 2016, undisturbed soil samples were collected to obtain soil aggregates. Aggregates stability was evaluated through the mean weight diameter (MWD) and mean geometric diameter (MGD) indexes and aggregate distribution by diameter classes. In macroaggregates, total organic carbon (TOC), total nitrogen (TN), clay flocculation degree (CF%) and ∆pH were evaluated. Results The use of swine manure, associated or not to MF, increases TOC and TN contents in soil aggregates in 67.02 and 125.87%, respectively, for SMC+MF treatment. However, it was not efficient in improving soil physical attributes, reducing soil aggregation indexes, mainly in the 5-10 cm layer, by the decreased values of MWD and MGD. This result corroborates with the increase in microaggregates in all treatments. This was a result of the negative ∆pH values and the increased CF%. Conclusion Despite the increase in organic matter contents observed in this study, this was not enough to guarantee an improvement in soil physical attributes over 4 years. These results show that management must be supported by several conservationist techniques in order to have soil quality.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91211278","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 : 2021-03-01DOI: 10.30486/IJROWA.2021.1900504.1078
M. Abrile, M. L. Fiasconaro, S. Gervasio, M. Antolín, M. Lovato
Purpose Reuse of landfill leachate is an effective alternative for their nutrients to mitigate decrease in freshwater. On the other hand, the growth of vegetation in the final disposal areas provides many benefits such as improving the visual impact, controlling of hydric erosion, etc. The purpose of this work was to evaluate landfill leachate as irrigation water and source of nutrients for growth of Tagetes erecta L., an ornamental plant with phytoremediation capacities. Method Vegetal growth, physiological responses and mineral elements uptake of the ornamental plant Tagetes erecta L. were studied with different levels of landfill leachate irrigation. The landfill leachate was provided by the municipal waste treatment. Experimental period covered 34 days of daily watering between the beginning and end of the flowering stage. Three different irrigation treatments were used: T1: 10% leachate; T2: 25% leachate; T3: 50% leachate. Hoagland's solution served as the control treatment. Results The irrigation treatment with a dose of 50% leachate causes a clear deterioration in the plant and its flowers. In lower doses, the plant responds favorably to both the production of flowers and the main features of them. Also, the water-use efficiency (WUE) is diminished in those plants irrigated with the major dose of leachate. Conclusion Maintaining controlled doses, landfill leachates can be used as an alternative source of water and nutrients. Irrigation with leachates of these characteristics should be done in dosages not higher than 25% to avoid possible damage of Tagetes erecta L. growth.
{"title":"Evaluation of the sensitivity and production of flowers in Tagetes erecta L. exposed to high doses of sodium from irrigation with landfill leachates","authors":"M. Abrile, M. L. Fiasconaro, S. Gervasio, M. Antolín, M. Lovato","doi":"10.30486/IJROWA.2021.1900504.1078","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1900504.1078","url":null,"abstract":"Purpose Reuse of landfill leachate is an effective alternative for their nutrients to mitigate decrease in freshwater. On the other hand, the growth of vegetation in the final disposal areas provides many benefits such as improving the visual impact, controlling of hydric erosion, etc. The purpose of this work was to evaluate landfill leachate as irrigation water and source of nutrients for growth of Tagetes erecta L., an ornamental plant with phytoremediation capacities. Method Vegetal growth, physiological responses and mineral elements uptake of the ornamental plant Tagetes erecta L. were studied with different levels of landfill leachate irrigation. The landfill leachate was provided by the municipal waste treatment. Experimental period covered 34 days of daily watering between the beginning and end of the flowering stage. Three different irrigation treatments were used: T1: 10% leachate; T2: 25% leachate; T3: 50% leachate. Hoagland's solution served as the control treatment. Results The irrigation treatment with a dose of 50% leachate causes a clear deterioration in the plant and its flowers. In lower doses, the plant responds favorably to both the production of flowers and the main features of them. Also, the water-use efficiency (WUE) is diminished in those plants irrigated with the major dose of leachate. Conclusion Maintaining controlled doses, landfill leachates can be used as an alternative source of water and nutrients. Irrigation with leachates of these characteristics should be done in dosages not higher than 25% to avoid possible damage of Tagetes erecta L. growth.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90634222","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 : 2021-03-01DOI: 10.30486/IJROWA.2021.1899156.1069
Ryoko Sekifuji, V. C. Le, M. Tateda, H. Takimoto
Purpose The solubility of silica is a key parameter affecting its suitability as a rice fertilizer. Therefore, this study determined the effect of calcination temperature and duration on the physical composition of silica derived from rice husk ash. Method Rice husks were calcined at 100–900 °C for 15–120 min in an electric furnace. The solubility and physical composition of the samples were measured, and the appearance of the calcined rice husk ash was determined via visual observations. Results The appearance of the rice husk ash changed drastically at a calcination temperature of 300 °C. The husk exhibited the whitest color at 500 °C and 120 min of calcination. The solubility of silica in the rice husk ash increased up to a calcination temperature of 500 °C and then started to decrease. The silica in the rice husk ash exhibited a gray zone between the amorphous and crystalline structures. Conclusion For actual field applications of silica derived from rice husk ash as a fertilizer, calcination conditions of 400–800 °C and 15 min are proposed to improve solubility. The optimal calcination temperature should be determined based on the heat recovery efficiency.
{"title":"Solubility and physical composition of rice husk ash silica as a function of calcination temperature and duration","authors":"Ryoko Sekifuji, V. C. Le, M. Tateda, H. Takimoto","doi":"10.30486/IJROWA.2021.1899156.1069","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1899156.1069","url":null,"abstract":"Purpose The solubility of silica is a key parameter affecting its suitability as a rice fertilizer. Therefore, this study determined the effect of calcination temperature and duration on the physical composition of silica derived from rice husk ash. Method Rice husks were calcined at 100–900 °C for 15–120 min in an electric furnace. The solubility and physical composition of the samples were measured, and the appearance of the calcined rice husk ash was determined via visual observations. Results The appearance of the rice husk ash changed drastically at a calcination temperature of 300 °C. The husk exhibited the whitest color at 500 °C and 120 min of calcination. The solubility of silica in the rice husk ash increased up to a calcination temperature of 500 °C and then started to decrease. The silica in the rice husk ash exhibited a gray zone between the amorphous and crystalline structures. Conclusion For actual field applications of silica derived from rice husk ash as a fertilizer, calcination conditions of 400–800 °C and 15 min are proposed to improve solubility. The optimal calcination temperature should be determined based on the heat recovery efficiency.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90823947","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 : 2021-03-01DOI: 10.30486/IJROWA.2021.1896893.1050
Ezinne E. Okorie, A. Ibrahim
Purpose The upsurge of vegetable oil production in Nigeria and the equally increasing concern for the environment which arises due to indiscriminate disposal of phytotoxic vegetable oil mill effluent in a less regulated country like Nigeria makes the re-use of the effluent for fertigation a suitable strategy for its disposal if the appropriate treatment technique is adopted. Method A laboratory experiment was set up to study how the detoxification of soybean oil mill effluent (SOME) under different anaerobic digestion time (0, 20 and 40 days) and application rates (0, 50 and 100 m3/ha) will influence the suitability of the effluent for fertigation. Results SOME has a pH of 8.3, which decreased steadily to 7.4 as digestion time increased to 40 days. EC and potassium levels also decreased as digestion time increased, from 0.37 dS/m and 120.6 g/l to 0.28 dS/m and 70.1 g/l, respectively. However, levels of organic carbon, nitrogen and phosphorus did not change significantly. The effluent impacted negatively on germination after a one-time application, with the germination index going as low as 22% for untreated SOME and gradually increasing to 66% as digestion time increased. Continuous application of the untreated effluent also affected soil microbial activity negatively when compared to the treated effluent. Conclusion Anaerobic digestion detoxifies SOME and the efficiency of the treatment increased with increasing digestion time. The effluent also contains low to moderate amounts of NPK and therefore has a potential for fertigation.
{"title":"Detoxification of soybean oil mill effluent using anaerobic digestion and the suitability of the digestate for fertigation","authors":"Ezinne E. Okorie, A. Ibrahim","doi":"10.30486/IJROWA.2021.1896893.1050","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1896893.1050","url":null,"abstract":"Purpose The upsurge of vegetable oil production in Nigeria and the equally increasing concern for the environment which arises due to indiscriminate disposal of phytotoxic vegetable oil mill effluent in a less regulated country like Nigeria makes the re-use of the effluent for fertigation a suitable strategy for its disposal if the appropriate treatment technique is adopted. Method A laboratory experiment was set up to study how the detoxification of soybean oil mill effluent (SOME) under different anaerobic digestion time (0, 20 and 40 days) and application rates (0, 50 and 100 m3/ha) will influence the suitability of the effluent for fertigation. Results SOME has a pH of 8.3, which decreased steadily to 7.4 as digestion time increased to 40 days. EC and potassium levels also decreased as digestion time increased, from 0.37 dS/m and 120.6 g/l to 0.28 dS/m and 70.1 g/l, respectively. However, levels of organic carbon, nitrogen and phosphorus did not change significantly. The effluent impacted negatively on germination after a one-time application, with the germination index going as low as 22% for untreated SOME and gradually increasing to 66% as digestion time increased. Continuous application of the untreated effluent also affected soil microbial activity negatively when compared to the treated effluent. Conclusion Anaerobic digestion detoxifies SOME and the efficiency of the treatment increased with increasing digestion time. The effluent also contains low to moderate amounts of NPK and therefore has a potential for fertigation.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83949536","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 : 2021-03-01DOI: 10.30486/IJROWA.2020.1904599.1104
Ishita Biswas, Debasis Mitra, A. Senapati, D. Mitra, Sourav Chattaraj, Mursheda K. Ali, G. Basak, P. Panneerselvam, P. Mohapatra
Purpose Chicken feather protein hydrolysate (CFPH) has drawn a significant attention as a component/type of biofertilizer in recent years, because of the beneficial impact on the growth of the plant. The current study aims to evaluate the potential influence of the combination of CFPH with vermicompost (VC) on growth-promotion and yield improvement in tomato plants. Method Feather degrading bacteria were isolated and characterized using 16s-rDNA sequencing, and assessed for biochemical reactions, growth-promoting attributes and keratinase activity. The medium used for feather degradation studies consisted of 0.75% (w/v) of raw feather, with 1% (v/v) of inoculum at 37°C, pH 7.5 and at 120 rpm. A field study was done by randomized block design (RBD) with five treatments in tomato. Results Keratinolytic and feather degrading bacteria isolated and used in this study were identified as Bacillus cereus PKID1 with accession number MT158702. The bacterium gave the highest keratinase activity of 80±0.28 U/ml. The CFPH showed the potential to promote remarkably the germination % of tomato (84.13), rice (87.24), onion (84.13), chilli (84.13), chickpea (73.24) seeds ; field experiment significantly increased plant growth and yield compared with control. Conclusion The principal component analysis of the field experiment as a result of tomato plant-growth, the order of best treatment efficacy for improvement of parameter estimates was as follows: CFPH and VC > CFPH > VC > recommended dose of fertilizers (RDF) > control. Thus, the application of CFPH with VC could improve the productivity of crops and decrease the use of chemical fertilizers.
{"title":"Valorization of vermicompost with bacterial fermented chicken feather hydrolysate for the yield improvement of tomato plant: A novel organic combination","authors":"Ishita Biswas, Debasis Mitra, A. Senapati, D. Mitra, Sourav Chattaraj, Mursheda K. Ali, G. Basak, P. Panneerselvam, P. Mohapatra","doi":"10.30486/IJROWA.2020.1904599.1104","DOIUrl":"https://doi.org/10.30486/IJROWA.2020.1904599.1104","url":null,"abstract":"Purpose Chicken feather protein hydrolysate (CFPH) has drawn a significant attention as a component/type of biofertilizer in recent years, because of the beneficial impact on the growth of the plant. The current study aims to evaluate the potential influence of the combination of CFPH with vermicompost (VC) on growth-promotion and yield improvement in tomato plants. Method Feather degrading bacteria were isolated and characterized using 16s-rDNA sequencing, and assessed for biochemical reactions, growth-promoting attributes and keratinase activity. The medium used for feather degradation studies consisted of 0.75% (w/v) of raw feather, with 1% (v/v) of inoculum at 37°C, pH 7.5 and at 120 rpm. A field study was done by randomized block design (RBD) with five treatments in tomato. Results Keratinolytic and feather degrading bacteria isolated and used in this study were identified as Bacillus cereus PKID1 with accession number MT158702. The bacterium gave the highest keratinase activity of 80±0.28 U/ml. The CFPH showed the potential to promote remarkably the germination % of tomato (84.13), rice (87.24), onion (84.13), chilli (84.13), chickpea (73.24) seeds ; field experiment significantly increased plant growth and yield compared with control. Conclusion The principal component analysis of the field experiment as a result of tomato plant-growth, the order of best treatment efficacy for improvement of parameter estimates was as follows: CFPH and VC > CFPH > VC > recommended dose of fertilizers (RDF) > control. Thus, the application of CFPH with VC could improve the productivity of crops and decrease the use of chemical fertilizers.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72766665","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 : 2021-02-22DOI: 10.30486/IJROWA.2021.1899111.1071
A. M. Akumah, E. Nartey, G. K. Ofosu-Budu, E. Ewusie, B. Offei, N. Adamtey
Purpose Compost production technology and use are known among Ghanaians farmers. However, the long composting period averaging three months has had adverse effect on adoption. The black soldier fly (Hermetia illucens) larvae (BSFL) feed voraciously and breaks down organic wastes fast. Addition of rice husk biochar (RHB) neutralises acidity and aerates the compost. Combined application of BSFL and RHB to feedstocks could therefore reduce composting period and improve compost quality. Method Two studies were conducted with market crop waste (MCW) as feedstock. Firstly, feedstocks at two particle sizes (x 10 mm), with and without BSFL were evaluated to determine degradability, chemical content of the degraded residue and to select appropriate feedstock size ideal for composting. Secondly, the selected feedstocks size of between 5 mm and 10 mm were inoculated with or without BSFL and RHB of 0%, 5% 10% and 15% added. Composting trials were conducted in barrels inclined at 30o to facilitate drainage. Physicochemical and biological parameters of feedstock were monitored until maturity. Results Degradability of MCW by BSFL was feedstock specific rather than feedstock size. Inoculation of BSFL and biochar addition reduced composting period from 76 to 45 days. Biochar addition at 15% increased P availability to 1882 mg kg-1 but reduced total N to 10.5 g kg-1. E coli levels decreased in the BSFL-biochar composts to acceptable limits. Conclusion Composting MCW with BSFL and biochar reduced composting period and improved compost quality.
{"title":"Innovations in market crop waste compost production: Use of black soldier fly larvae and biochar","authors":"A. M. Akumah, E. Nartey, G. K. Ofosu-Budu, E. Ewusie, B. Offei, N. Adamtey","doi":"10.30486/IJROWA.2021.1899111.1071","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1899111.1071","url":null,"abstract":"Purpose Compost production technology and use are known among Ghanaians farmers. However, the long composting period averaging three months has had adverse effect on adoption. The black soldier fly (Hermetia illucens) larvae (BSFL) feed voraciously and breaks down organic wastes fast. Addition of rice husk biochar (RHB) neutralises acidity and aerates the compost. Combined application of BSFL and RHB to feedstocks could therefore reduce composting period and improve compost quality. Method Two studies were conducted with market crop waste (MCW) as feedstock. Firstly, feedstocks at two particle sizes (x 10 mm), with and without BSFL were evaluated to determine degradability, chemical content of the degraded residue and to select appropriate feedstock size ideal for composting. Secondly, the selected feedstocks size of between 5 mm and 10 mm were inoculated with or without BSFL and RHB of 0%, 5% 10% and 15% added. Composting trials were conducted in barrels inclined at 30o to facilitate drainage. Physicochemical and biological parameters of feedstock were monitored until maturity. Results Degradability of MCW by BSFL was feedstock specific rather than feedstock size. Inoculation of BSFL and biochar addition reduced composting period from 76 to 45 days. Biochar addition at 15% increased P availability to 1882 mg kg-1 but reduced total N to 10.5 g kg-1. E coli levels decreased in the BSFL-biochar composts to acceptable limits. Conclusion Composting MCW with BSFL and biochar reduced composting period and improved compost quality.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82333604","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 : 2021-02-20DOI: 10.30486/IJROWA.2021.1891960.1034
R. Ranasinghe, Btsdp Kannagara, R. Ratnayake
PurposeFish waste is a protein-rich source that can be used as a value-added product in the formulation of organic liquid fertilizers. This study carried out to investigate the utilizing potential of fruit wastes of Ananas comosus and Carica papaya that contain bromelain and papain as major proteases in order to hydrolyze fish waste proteins to fulfill plant nitrogen requirements. MethodProteases were extracted from A. comosus (leaves, crown, unripe fruit pulp, ripe fruit peels and pulp) and C. papaya (leaves, ripe fruit peels and unripe fruit peels). The optimum temperature and pH for the enzymatic activities were determined. Four liquid organic fertilizers were produced with hydrolyzed fish waste that enriched by adding Gliricidia sepium, Chromolaena odorata, Tithonia diversifolia, Mikania scandens and coconut husk-ash. Fertilizers were tested on the growth of Basella alba comparing with a standard fertilizer. Results Ananas comosus ripe fruit peels and the mixture of (A. comosus + C. papaya) showed the highest enzyme activities (0.33±0.02 and 0.36±0.01 U mL-1 enzyme respectively) at 55 oC and 70 oC. The optimum pH for all the studied extracts was 7.5 at 37 oC. The highest plant fresh and dry weights were recorded in the foliar-applied fertilizer produced by hydrolyzing the fish waste using A. comosus and C. papaya, showing no significant differences to the standard fertilizer. Conclusion Hydrolysis of fish waste using the fruit wastes ofA. comosus and C. papaya could be effectively used as an organic fertilizer for the growth of B. alba that leads towards sustainable waste management.
目的鱼粪是一种富含蛋白质的来源，可以作为有机液体肥料配方中的增值产品。本研究旨在探讨以菠萝蛋白酶和木瓜蛋白酶为主要蛋白酶的菊苣(Ananas comosus)和番木瓜(Carica papaya)果实废弃物在水解鱼类废弃物蛋白以满足植物氮需求方面的利用潜力。方法分别从山茱萸(叶片、树冠、未成熟果肉、成熟果皮和果肉)和木瓜(叶片、成熟果皮和未成熟果皮)中提取蛋白酶。确定了酶活性的最佳温度和pH。以鱼粪为原料，在鱼粪中添加水杨花、臭臭草、金柳、薇甘菊和椰壳灰，进行了液体有机肥的生产。与标准肥料进行了白僵菌生长试验。结果在55℃和70℃时，菖蒲成熟果皮和菖蒲+番木瓜的混合物酶活性最高，分别为0.33±0.02和0.36±0.01 U mL-1。所有提取物在37℃下的最适pH为7.5。鱼粪水解液和木瓜叶施肥料的植株鲜重和干重最高，与标准肥料差异不显著。结论利用牛蒡果渣水解鱼废。菊苣和番木瓜可以有效地作为白藻生长的有机肥，从而实现废物的可持续管理。
{"title":"Hydrolysis of fish waste using fruit wastes of Ananas comosus and Carica papaya for the formulation of liquid fertilizers","authors":"R. Ranasinghe, Btsdp Kannagara, R. Ratnayake","doi":"10.30486/IJROWA.2021.1891960.1034","DOIUrl":"https://doi.org/10.30486/IJROWA.2021.1891960.1034","url":null,"abstract":"PurposeFish waste is a protein-rich source that can be used as a value-added product in the formulation of organic liquid fertilizers. This study carried out to investigate the utilizing potential of fruit wastes of Ananas comosus and Carica papaya that contain bromelain and papain as major proteases in order to hydrolyze fish waste proteins to fulfill plant nitrogen requirements. MethodProteases were extracted from A. comosus (leaves, crown, unripe fruit pulp, ripe fruit peels and pulp) and C. papaya (leaves, ripe fruit peels and unripe fruit peels). The optimum temperature and pH for the enzymatic activities were determined. Four liquid organic fertilizers were produced with hydrolyzed fish waste that enriched by adding Gliricidia sepium, Chromolaena odorata, Tithonia diversifolia, Mikania scandens and coconut husk-ash. Fertilizers were tested on the growth of Basella alba comparing with a standard fertilizer. Results Ananas comosus ripe fruit peels and the mixture of (A. comosus + C. papaya) showed the highest enzyme activities (0.33±0.02 and 0.36±0.01 U mL-1 enzyme respectively) at 55 oC and 70 oC. The optimum pH for all the studied extracts was 7.5 at 37 oC. The highest plant fresh and dry weights were recorded in the foliar-applied fertilizer produced by hydrolyzing the fish waste using A. comosus and C. papaya, showing no significant differences to the standard fertilizer. Conclusion Hydrolysis of fish waste using the fruit wastes ofA. comosus and C. papaya could be effectively used as an organic fertilizer for the growth of B. alba that leads towards sustainable waste management.","PeriodicalId":14373,"journal":{"name":"International Journal Of Recycling of Organic Waste in Agriculture","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90404140","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}
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