Standardization of the quality of the depolarized katuk pellet production process as a feed additive is very important to maintain product quality. The production process requires dry katuk leaves (DKK) as raw materials which are then processed into depolarized katuk leaves (DKD), and continues in the pelleting process to become depolarized katuk pellets (PKD). Quality standard can be done by measuring the parameters of nutritional value and also the yield of methanol extract. Nutritional values were obtained from the results of proximate analysis, namely the percentage of dry matter, ash content, crude protein, crude fiber, crude fat, beta-N, calcium, phosphorus, and gross energy (Cal/g). Mean while, the yield of methanol extract was obtained by maceration using methanol solvent. This study aims to evaluate the nutritional value and yield of crude methanol extract of katuk leaves (DKK, DKD, PKD) which can be used as a quality assurance standard for the depolarized katuk pellet production process. In general, the nutritional value of DKD and PKD had the same value as that of DKK, except for calcium which was quite high (P<0.05) in DKD and PKD, and the percentage of crude fiber was lower (P<0.05) in PKD compared to DKK and DKD. The percentage of crude fat in pellets (PKD) was higher (P<0.05) when compared to DKK and DKD. The yield of methanol extract was very high (P<0.05) in DKK, compared to DKD and PKD. The nutritional parameters and the yield of the katuk leaf extract can be used as quality assurance standards for the depolarized katuk pellet production process.
Keywords: depolarization, katuk, methanol, nutrition, pellet
{"title":"Nilai Nutrisi dan Rendemen Ekstrak Metanol Pelet Katuk Depolarisasi sebagai Parameter Standar Mutu Produksi","authors":"Agik Suprayogi, Fadjar Satrija, Muladno Muladno, Ronald Tarigan, Afton Atabany, Novriyandi Hanif, Welly Sugiono, Yuliantoni Yuliantoni","doi":"10.18343/jipi.28.4.607","DOIUrl":"https://doi.org/10.18343/jipi.28.4.607","url":null,"abstract":"Standardization of the quality of the depolarized katuk pellet production process as a feed additive is very important to maintain product quality. The production process requires dry katuk leaves (DKK) as raw materials which are then processed into depolarized katuk leaves (DKD), and continues in the pelleting process to become depolarized katuk pellets (PKD). Quality standard can be done by measuring the parameters of nutritional value and also the yield of methanol extract. Nutritional values were obtained from the results of proximate analysis, namely the percentage of dry matter, ash content, crude protein, crude fiber, crude fat, beta-N, calcium, phosphorus, and gross energy (Cal/g). Mean while, the yield of methanol extract was obtained by maceration using methanol solvent. This study aims to evaluate the nutritional value and yield of crude methanol extract of katuk leaves (DKK, DKD, PKD) which can be used as a quality assurance standard for the depolarized katuk pellet production process. In general, the nutritional value of DKD and PKD had the same value as that of DKK, except for calcium which was quite high (P<0.05) in DKD and PKD, and the percentage of crude fiber was lower (P<0.05) in PKD compared to DKK and DKD. The percentage of crude fat in pellets (PKD) was higher (P<0.05) when compared to DKK and DKD. The yield of methanol extract was very high (P<0.05) in DKK, compared to DKD and PKD. The nutritional parameters and the yield of the katuk leaf extract can be used as quality assurance standards for the depolarized katuk pellet production process.
 
 Keywords: depolarization, katuk, methanol, nutrition, pellet","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135165116","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}
Soft rot disease in orchid plants is a factor in decreasing orchid production. One way of biological control that has the potential to spur growth is to utilize endophytic bacteria. This study aims to describe the diversity of orchid endophytic bacteria that have the potential as growth promoters and biocontrol agents. Observation parameters include indole acetic acid (IAA) production, inorganic phosphate dissolution, ammonia production of orchid endophytic bacteria, and antagonism of endophytic bacteria to pathogenic bacteria that cause soft rot in vitro. The diversity of orchid endophytic bacteria was analyzed using rep-PCR with BOX-A1R primer. The results showed that 10 isolates of orchid endophytic bacteria were able to produce IAA with a concentration of 79–321 μg/mL, able to dissolve phosphate, and produce ammonia. In antagonism testing against soft rot-causing bacteria, all isolates were able to form an inhibitory zone with a diameter of 3–7.2 cm. Furthermore, diversity analysis using rep-PCR showed that isolates of endophytic bacteria DnPh5, BgCt2, BgVt10, DnLp7, DnBl1, and DnAr4 had a uniform DNA band pattern so that they were grouped together. Meanwhile, isolates of TbPh7, IbtPhm1, DnDr2, and AkOc1 showed different DNA band patterns, indicating that the four isolates were different species or subspecies of bacteria. In dendrogram analysis, DnPh5, BgCt2, BgVt10, DnLp7, DnBl1, and DnAr4 isolates have a similarity of 100%. The similarity of isolates IbtPhm1, DnDr2, and AkOc1 was 90%, 79%, and 68%, respectively, against the other six isolates. TbPh7 isolate is an isolate with a low level of similarity to other isolates, which is about 51%.
Keywords: orchid, endophytic bacteria, growth promoter, biocontrol agent, rep-PCR
{"title":"Potensi dan Keragaman Bakteri Endofit sebagai Agens Pemacu Pertumbuhan dan Biokontrol Anggrek","authors":"Mery Irianti Amba Linggi, Tri Joko, Jaka Widada","doi":"10.18343/jipi.28.4.675","DOIUrl":"https://doi.org/10.18343/jipi.28.4.675","url":null,"abstract":"Soft rot disease in orchid plants is a factor in decreasing orchid production. One way of biological control that has the potential to spur growth is to utilize endophytic bacteria. This study aims to describe the diversity of orchid endophytic bacteria that have the potential as growth promoters and biocontrol agents. Observation parameters include indole acetic acid (IAA) production, inorganic phosphate dissolution, ammonia production of orchid endophytic bacteria, and antagonism of endophytic bacteria to pathogenic bacteria that cause soft rot in vitro. The diversity of orchid endophytic bacteria was analyzed using rep-PCR with BOX-A1R primer. The results showed that 10 isolates of orchid endophytic bacteria were able to produce IAA with a concentration of 79–321 μg/mL, able to dissolve phosphate, and produce ammonia. In antagonism testing against soft rot-causing bacteria, all isolates were able to form an inhibitory zone with a diameter of 3–7.2 cm. Furthermore, diversity analysis using rep-PCR showed that isolates of endophytic bacteria DnPh5, BgCt2, BgVt10, DnLp7, DnBl1, and DnAr4 had a uniform DNA band pattern so that they were grouped together. Meanwhile, isolates of TbPh7, IbtPhm1, DnDr2, and AkOc1 showed different DNA band patterns, indicating that the four isolates were different species or subspecies of bacteria. In dendrogram analysis, DnPh5, BgCt2, BgVt10, DnLp7, DnBl1, and DnAr4 isolates have a similarity of 100%. The similarity of isolates IbtPhm1, DnDr2, and AkOc1 was 90%, 79%, and 68%, respectively, against the other six isolates. TbPh7 isolate is an isolate with a low level of similarity to other isolates, which is about 51%.
 
 Keywords: orchid, endophytic bacteria, growth promoter, biocontrol agent, rep-PCR","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135165114","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}
One highly sought-after vegetable is Kalian (Brassica oleraceae L.), valued for its exceptional nutritional content. The cultivation of kalian demands specialized attention. Hydroponic cultivation utilizing Calcium Chloride plays a pivotal role in fostering robust plant growth and resilience, particularly in urban settings. Calcium serves a multifaceted role: safeguarding against pests, enhancing fruit quality, and functioning as an antioxidant during storage. This research was conducted between October 2022 and February 2023, employing a single-factor Randomized Block Design (RBD) that was replicated three times. The study encompassed the following treatments: (i) Control with 0 ppm CaCl2, (ii) 550 ppm CaCl2 (P1), (iii) 650 ppm CaCl2 (P2), and (iv) 750 ppm CaCl2 (P3). The observed parameters encompassed plant height, leaf count, leaf area, fresh weight, and dry weight. The data underwent analysis via analysis of variance (ANOVA), followed by the Honest Significant Difference (HSD) test at the 5% significance level. The outcomes of the study unveiled substantial and statistically significant responses at the 7th, 14th, 21st, and 28th days after planting (HST) concerning the leaf count and wet weight variables. However, no statistically significant response was observed in relation to root length and leaf area measurements. Keywords: CaCl2, kailan, hydroponics, Ab Mix nutrition
{"title":"Pengkayaan CaCl2 pada Nutrisi Hidroponik untuk Meningkatkan Hasil Tanaman Kailan (Brassica oleraceae L.)","authors":"M. Abror, Agus Miftakhurrohmat, Saiful Arifin","doi":"10.18343/jipi.28.4.685","DOIUrl":"https://doi.org/10.18343/jipi.28.4.685","url":null,"abstract":"One highly sought-after vegetable is Kalian (Brassica oleraceae L.), valued for its exceptional nutritional content. The cultivation of kalian demands specialized attention. Hydroponic cultivation utilizing Calcium Chloride plays a pivotal role in fostering robust plant growth and resilience, particularly in urban settings. Calcium serves a multifaceted role: safeguarding against pests, enhancing fruit quality, and functioning as an antioxidant during storage. This research was conducted between October 2022 and February 2023, employing a single-factor Randomized Block Design (RBD) that was replicated three times. The study encompassed the following treatments: (i) Control with 0 ppm CaCl2, (ii) 550 ppm CaCl2 (P1), (iii) 650 ppm CaCl2 (P2), and (iv) 750 ppm CaCl2 (P3). The observed parameters encompassed plant height, leaf count, leaf area, fresh weight, and dry weight. The data underwent analysis via analysis of variance (ANOVA), followed by the Honest Significant Difference (HSD) test at the 5% significance level. The outcomes of the study unveiled substantial and statistically significant responses at the 7th, 14th, 21st, and 28th days after planting (HST) concerning the leaf count and wet weight variables. However, no statistically significant response was observed in relation to root length and leaf area measurements. \u0000 \u0000Keywords: CaCl2, kailan, hydroponics, Ab Mix nutrition","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135165117","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}
Asti Istiqomah, Yolamalinda Yolamalinda, Laili Fuji Widyawati
The world population is proliferating, and the proportion of people living in urban areas is also increasing. It is challenging to achieve the SDGs, especially SDG 11, which aims to make cities and communities more inclusive, safe, resilient, and sustainable. Meeting the needs of urban residents, such as housing, public infrastructure, a clean environment, security, jobs, and other basic needs to live comfortably in a city with limited resources, is a problem. Sustainable cities are becoming increasingly important today to facilitate the growth of sustainable cities that integrate economic, sociocultural, environmental, ICT/transverse, and urban dimensions. Effective evaluation of urban sustainability is essential for sustainable development. Banten Province is one of the regions that has committed to achieving the SDGs. This commitment is contained in Banten Governor Regulation Number 47 of 2019 concerning the Regional Action Plan for the Sustainable Development Goals of Banten Province for 2020‒2022. Therefore, this study aims to assess and map the sustainability status of cities in Banten Province using Multi-Criteria Decision Analysis (MCDA) analysis and processed with PROMETHEE (Preference Ranking Organization METHods for Enrichment Evaluation). The number of criteria for a sustainable city in 2012 was 82 criteria and 109 criteria in 2022, where the highest number of criteria is on the sociocultural and economic dimensions. The PROMETHEE results show that the cities in Banten Province with the best sustainability levels are Tangerang City and South Tangerang City. City governments with low sustainability status or experiencing a decrease in sustainability status need to improve the performance of sustainable city indicators so that development can be sustainable.
Keywords: ecology, economics, evaluation, preference ranking organization methods for enrichment evaluation, social
{"title":"Penilaian dan Pemetaan Status Keberlanjutan Kota di Provinsi Banten","authors":"Asti Istiqomah, Yolamalinda Yolamalinda, Laili Fuji Widyawati","doi":"10.18343/jipi.28.4.667","DOIUrl":"https://doi.org/10.18343/jipi.28.4.667","url":null,"abstract":"The world population is proliferating, and the proportion of people living in urban areas is also increasing. It is challenging to achieve the SDGs, especially SDG 11, which aims to make cities and communities more inclusive, safe, resilient, and sustainable. Meeting the needs of urban residents, such as housing, public infrastructure, a clean environment, security, jobs, and other basic needs to live comfortably in a city with limited resources, is a problem. Sustainable cities are becoming increasingly important today to facilitate the growth of sustainable cities that integrate economic, sociocultural, environmental, ICT/transverse, and urban dimensions. Effective evaluation of urban sustainability is essential for sustainable development. Banten Province is one of the regions that has committed to achieving the SDGs. This commitment is contained in Banten Governor Regulation Number 47 of 2019 concerning the Regional Action Plan for the Sustainable Development Goals of Banten Province for 2020‒2022. Therefore, this study aims to assess and map the sustainability status of cities in Banten Province using Multi-Criteria Decision Analysis (MCDA) analysis and processed with PROMETHEE (Preference Ranking Organization METHods for Enrichment Evaluation). The number of criteria for a sustainable city in 2012 was 82 criteria and 109 criteria in 2022, where the highest number of criteria is on the sociocultural and economic dimensions. The PROMETHEE results show that the cities in Banten Province with the best sustainability levels are Tangerang City and South Tangerang City. City governments with low sustainability status or experiencing a decrease in sustainability status need to improve the performance of sustainable city indicators so that development can be sustainable.
 
 Keywords: ecology, economics, evaluation, preference ranking organization methods for enrichment evaluation, social","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135165115","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}
Gian Suryanatha Hartawan, Uun Yanuhar, Muhammad Musa, Heru Suryanto, Gunanti Mahasri, Apri Supii, Nico Rahman Caesar
Cantang grouper (Epinephelus sp.) is a fish with a high economic value and has been widely cultivated. VNN disase, caused by Betanodavirus infection, can lead to mass mortality of cantang grouper. Precautions considered effective in preventing Viral nervous necrosis (VNN) disease include vaccination. This study aimed to determine the effect of administering recombinant Chlorella vulgaris protein nanovaccine based on chitosan hybrid nanoparticles in increasing the immune response of cantang grouper infected with VNN. The study consisted of five treatments: K+ (cantang grouper infected with VNN), K- (healthy cantang grouper), T1 (healthy cantang grouper given 33 µl of nanovaccine and then challenged with VNN), T2 (healthy cantang grouper given 66 µl of nanovaccine and then tested with a VNN challenge), and T3 (healthy cantang grouper given 112 µl of nanovaccine and then tested with a VNN challenge). The parameters observed were haematology, nanovaccine Relative percent survival (RPS), and Survival rate (SR) levels. The study results showed that administering the nanovaccine increased the immune response of the fish, as indicated by an increase in haematology response, RPS, and SR in cantang grouper compared to the treatment without nanovaccine administration. The best dose of nanovaccine in this study is 33 µl.
Keywords: fish disease, nanovaccines, virus, C. vulgaris, grouper
{"title":"Pengaruh Nanovaksin Berbasis Nanopartikel Hybrid Chitosan Terhadap Sel Darah Ikan Kerapu Cantang Yang Diinfeksi VNN","authors":"Gian Suryanatha Hartawan, Uun Yanuhar, Muhammad Musa, Heru Suryanto, Gunanti Mahasri, Apri Supii, Nico Rahman Caesar","doi":"10.18343/jipi.28.4.650","DOIUrl":"https://doi.org/10.18343/jipi.28.4.650","url":null,"abstract":"Cantang grouper (Epinephelus sp.) is a fish with a high economic value and has been widely cultivated. VNN disase, caused by Betanodavirus infection, can lead to mass mortality of cantang grouper. Precautions considered effective in preventing Viral nervous necrosis (VNN) disease include vaccination. This study aimed to determine the effect of administering recombinant Chlorella vulgaris protein nanovaccine based on chitosan hybrid nanoparticles in increasing the immune response of cantang grouper infected with VNN. The study consisted of five treatments: K+ (cantang grouper infected with VNN), K- (healthy cantang grouper), T1 (healthy cantang grouper given 33 µl of nanovaccine and then challenged with VNN), T2 (healthy cantang grouper given 66 µl of nanovaccine and then tested with a VNN challenge), and T3 (healthy cantang grouper given 112 µl of nanovaccine and then tested with a VNN challenge). The parameters observed were haematology, nanovaccine Relative percent survival (RPS), and Survival rate (SR) levels. The study results showed that administering the nanovaccine increased the immune response of the fish, as indicated by an increase in haematology response, RPS, and SR in cantang grouper compared to the treatment without nanovaccine administration. The best dose of nanovaccine in this study is 33 µl.
 
 Keywords: fish disease, nanovaccines, virus, C. vulgaris, grouper","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840200","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}
Ameliorant is a substance that can increase soil fertility by improving the soil's physical, chemical, and biological conditions, and it can be organic or inorganic. Some ameliorants often used are manure, lime, or a combination of all these fertilizers. This study aimed to determine the effect of ameliorants on the growth and production of sweet corn. The study was conducted at the Experimental Station of the Faculty of Agriculture, University of Muhammadiyah Jakarta, from July to October 2022. The study used a Randomized Completely Block Design with five ameliorant treatments and five replications, so there were 25 experimental units. Each experimental unit consisted of three plants. The treatments given were P0 (without ameliorant as control)), P1 (calcite 5 g/plant), P2 (dolomite 5 g/plant), P3 (green mussel shell waste 5 g/plant, and P4 (zeolite 5 g/plant). The results showed that ameliorants gave similar results as controls and did not increase the growth and production of sweet corn plants.
Keywords: ameliorant, green mussel shell, soil pH
{"title":"Efek Amelioran pada Pertumbuhan dan Produksi Tanaman Jagung Manis","authors":"Elfarisna Elfarisna, Erlina Rahmayuni, Helfi Gustia","doi":"10.18343/jipi.28.4.660","DOIUrl":"https://doi.org/10.18343/jipi.28.4.660","url":null,"abstract":"Ameliorant is a substance that can increase soil fertility by improving the soil's physical, chemical, and biological conditions, and it can be organic or inorganic. Some ameliorants often used are manure, lime, or a combination of all these fertilizers. This study aimed to determine the effect of ameliorants on the growth and production of sweet corn. The study was conducted at the Experimental Station of the Faculty of Agriculture, University of Muhammadiyah Jakarta, from July to October 2022. The study used a Randomized Completely Block Design with five ameliorant treatments and five replications, so there were 25 experimental units. Each experimental unit consisted of three plants. The treatments given were P0 (without ameliorant as control)), P1 (calcite 5 g/plant), P2 (dolomite 5 g/plant), P3 (green mussel shell waste 5 g/plant, and P4 (zeolite 5 g/plant). The results showed that ameliorants gave similar results as controls and did not increase the growth and production of sweet corn plants.
 
 Keywords: ameliorant, green mussel shell, soil pH","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840202","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}
Raden Ajie Syahbarie, Antonius Suwanto, Aris Tri Wahyudi
Traditional nata de coco fermentation often results in inconsistent nata thickness. From the producer's perspective, thin nata sheets are detrimental because most fermentation media will be wasted. The main cause of this condition may be that the microbial population in the starter culture is different in each batch. It is necessary to observe the cultured microbial community on various qualities of available thick and thin nata to design a better nata de coco starter culture. This study showed thick nata had more Komagataeibacter intermedius bacteria (pellicle forming) than thin nata. In traditional nata fermentation, K. intermedius always coexists with other microbes from the bacteria and yeast groups. Random Amplified Polymorphic DNA (RAPD) analysis indicated that the genetic diversity of bacteria was higher than that of the yeast group.
Keywords: dendrogram of relationship, fermented food, microbial genetic diversity, nata de coco
{"title":"Komunitas Mikrob pada Hasil Fermentasi Nata De Coco Berdasarkan Marka Random Amplified Polymorphic DNA","authors":"Raden Ajie Syahbarie, Antonius Suwanto, Aris Tri Wahyudi","doi":"10.18343/jipi.28.4.620","DOIUrl":"https://doi.org/10.18343/jipi.28.4.620","url":null,"abstract":"Traditional nata de coco fermentation often results in inconsistent nata thickness. From the producer's perspective, thin nata sheets are detrimental because most fermentation media will be wasted. The main cause of this condition may be that the microbial population in the starter culture is different in each batch. It is necessary to observe the cultured microbial community on various qualities of available thick and thin nata to design a better nata de coco starter culture. This study showed thick nata had more Komagataeibacter intermedius bacteria (pellicle forming) than thin nata. In traditional nata fermentation, K. intermedius always coexists with other microbes from the bacteria and yeast groups. Random Amplified Polymorphic DNA (RAPD) analysis indicated that the genetic diversity of bacteria was higher than that of the yeast group.
 
 Keywords: dendrogram of relationship, fermented food, microbial genetic diversity, nata de coco","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":" 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840203","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}
Nur Indah Lumban Gaol, Fanny Hidayati, Widyanto Dwi Nugroho, Harry Praptoyo, Oka Karyanto, Sri Nugroho Marsoem
This study aims to determinethe physical properties and mechanical properties at axial (base, middle, and top) and radial (near the pith, middle, and near the bark) positions, as well as the relationship between the specific gravity and mechanical properties of Acacia aulacocarpa wood. Three 27-year-old trees planted at KHDTK Wanagama wereused. Wood physical and mechanical propertieswere tested per British Standard 373:1957. The statistical analysis used was a two-way ANOVA and a follow-up test of Tukey HSD. The results showed that the average moisture content was 98.95%; the green and air-dry sepesific gravity were 0.58 and 0.61. Radial, tangential, and longitudinal shrinkage from green to oven-dry conditions (total shrinkage) were 2.02%, 5.09%, and 0.33%. The tangential/radial (T/R) ratio was 2.80%. The static bending strength of stress at proportion limit, MoE, and MoR were 498.13 kg/cm2, 116.16x1000 kg/cm2, and 1043.68 kg/cm2, respectively. The compressive strength parallel to the grain and perpendicular to the grain were 596.05 kg/cm2 and 227.25 kg/cm2, respectively. The results of the variance analysis showed that the radial position factor has a significant effect on green moisture content, green and air-dry specificgravity, total radial shrinkage, T/R ratio, static bending strength at stress of proportion limit, MoE, MoR, compressive strength parallel to the grain, and compressive strength perpendicular to the grain. However, the axial position factor did not show any significant differences in the physical and mechanical properties of the wood. Furthermore, air-dry specific gravity has a significant moderate to high positive correlation with all mechanical properties.
Keywords: Acacia aulacocarpa, physical properties, mechanical properties, axial position, radial position
{"title":"Sifat Fisika dan Mekanika Kayu Acacia aulacocarpa dari KHDTK Wanagama","authors":"Nur Indah Lumban Gaol, Fanny Hidayati, Widyanto Dwi Nugroho, Harry Praptoyo, Oka Karyanto, Sri Nugroho Marsoem","doi":"10.18343/jipi.28.4.630","DOIUrl":"https://doi.org/10.18343/jipi.28.4.630","url":null,"abstract":"This study aims to determinethe physical properties and mechanical properties at axial (base, middle, and top) and radial (near the pith, middle, and near the bark) positions, as well as the relationship between the specific gravity and mechanical properties of Acacia aulacocarpa wood. Three 27-year-old trees planted at KHDTK Wanagama wereused. Wood physical and mechanical propertieswere tested per British Standard 373:1957. The statistical analysis used was a two-way ANOVA and a follow-up test of Tukey HSD. The results showed that the average moisture content was 98.95%; the green and air-dry sepesific gravity were 0.58 and 0.61. Radial, tangential, and longitudinal shrinkage from green to oven-dry conditions (total shrinkage) were 2.02%, 5.09%, and 0.33%. The tangential/radial (T/R) ratio was 2.80%. The static bending strength of stress at proportion limit, MoE, and MoR were 498.13 kg/cm2, 116.16x1000 kg/cm2, and 1043.68 kg/cm2, respectively. The compressive strength parallel to the grain and perpendicular to the grain were 596.05 kg/cm2 and 227.25 kg/cm2, respectively. The results of the variance analysis showed that the radial position factor has a significant effect on green moisture content, green and air-dry specificgravity, total radial shrinkage, T/R ratio, static bending strength at stress of proportion limit, MoE, MoR, compressive strength parallel to the grain, and compressive strength perpendicular to the grain. However, the axial position factor did not show any significant differences in the physical and mechanical properties of the wood. Furthermore, air-dry specific gravity has a significant moderate to high positive correlation with all mechanical properties.
 Keywords: Acacia aulacocarpa, physical properties, mechanical properties, axial position, radial position","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135840201","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}
Soil pollution can occur due to agricultural waste, one of which is the excessive use of pesticides. Contaminants that are often found are heavy metal of copper (Cu). Rice plants will absorb and store heavy metal elements in polluted soil and waters, and these heavy metals will undergo a process of bioaccumulation in plants that affect plant growth. Efforts to deal with heavy metal contaminants have been carried out. In its application, plants such as hydrilla plant (Hydrilla verticillata) can be used to reduce pollution in the environment. This study aims to determine the effectiveness of using hydrilla plants in reducing heavy metal pollutant copper in flooded rice cultivation. This research was conducted from May-November 2022 at the Agrotechnology Greenhouse, and for laboratory testing it was carried out at the CDAST Laboratory, University of Jember. This research was conducted using a completely randomized design consisting of one factor with four replications. Giving hydrilla did not significantly affect the morphology of rice plants but had a significant effect on the increasing levels of chlorophyll. The concentration of copper in rice plants decreased after treatment with hydrilla plants compared to negative controls without hydrilla plants. In this study, it can be concluded that the use of hydrilla was able to reduce the levels of copper metal present in rice plants and did not affect the growth of rice plants morphologically.
Keywords: copper, hydrilla, paddy, soil contamination
{"title":"Effectiveness of Hydrilla verticillata as Bioaccumulator Against Soil Contamination in Flooded Rice Cultivation","authors":"Iqbal Bayu Ferdiansah, Mohammad Ubaidillah","doi":"10.18343/jipi.28.4.641","DOIUrl":"https://doi.org/10.18343/jipi.28.4.641","url":null,"abstract":"Soil pollution can occur due to agricultural waste, one of which is the excessive use of pesticides. Contaminants that are often found are heavy metal of copper (Cu). Rice plants will absorb and store heavy metal elements in polluted soil and waters, and these heavy metals will undergo a process of bioaccumulation in plants that affect plant growth. Efforts to deal with heavy metal contaminants have been carried out. In its application, plants such as hydrilla plant (Hydrilla verticillata) can be used to reduce pollution in the environment. This study aims to determine the effectiveness of using hydrilla plants in reducing heavy metal pollutant copper in flooded rice cultivation. This research was conducted from May-November 2022 at the Agrotechnology Greenhouse, and for laboratory testing it was carried out at the CDAST Laboratory, University of Jember. This research was conducted using a completely randomized design consisting of one factor with four replications. Giving hydrilla did not significantly affect the morphology of rice plants but had a significant effect on the increasing levels of chlorophyll. The concentration of copper in rice plants decreased after treatment with hydrilla plants compared to negative controls without hydrilla plants. In this study, it can be concluded that the use of hydrilla was able to reduce the levels of copper metal present in rice plants and did not affect the growth of rice plants morphologically.
 
 Keywords: copper, hydrilla, paddy, soil contamination","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135999047","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}
Potato is one of the horticultural crops with high economic value and potential as an export commodity. The productivity of potatoes in Central Java tends to decrease, and it is suspected that the use of production inputs is not optimal. This study aims to evaluate the performance of the use of production inputs, the factors that influence potato production, and the optimization of the use of production inputs in potato farming in the Dieng Plateau. The research was conducted from October to December 2021 in Sumberejo Village, Batur Subdistrict, Banjarnegara District, which has an altitude of + 1700 meters above sea level. This research used a survey method on 30 potato farmers. The data obtained were analyzed descriptively, and analyzed the factors that influence production using multiple linear regression, followed by an optimization test on the use of production inputs. The results showed that the use of production inputs among farmers still varied and had not followed the results of soil analysis. Seed, manure, and labor are production inputs that have a significant positive effect on potato production. To get maximum production, farmers need to add seeds, NPK fertilizer, and manure according to recommendations, while the use of labor needs to be reduced to achieve optimal yields. Keywords: highlands, inputs, increased production, potato, production
{"title":"Optimasi Penggunaan Input Produksi pada Usahatani Kentang di Dataran Tinggi Dieng, Jawa Tengah","authors":"Dewi Sahara, M. E. Wulanjari, Joko Triastono","doi":"10.18343/jipi.28.4.612","DOIUrl":"https://doi.org/10.18343/jipi.28.4.612","url":null,"abstract":"Potato is one of the horticultural crops with high economic value and potential as an export commodity. The productivity of potatoes in Central Java tends to decrease, and it is suspected that the use of production inputs is not optimal. This study aims to evaluate the performance of the use of production inputs, the factors that influence potato production, and the optimization of the use of production inputs in potato farming in the Dieng Plateau. The research was conducted from October to December 2021 in Sumberejo Village, Batur Subdistrict, Banjarnegara District, which has an altitude of + 1700 meters above sea level. This research used a survey method on 30 potato farmers. The data obtained were analyzed descriptively, and analyzed the factors that influence production using multiple linear regression, followed by an optimization test on the use of production inputs. The results showed that the use of production inputs among farmers still varied and had not followed the results of soil analysis. Seed, manure, and labor are production inputs that have a significant positive effect on potato production. To get maximum production, farmers need to add seeds, NPK fertilizer, and manure according to recommendations, while the use of labor needs to be reduced to achieve optimal yields. Keywords: highlands, inputs, increased production, potato, production","PeriodicalId":31211,"journal":{"name":"Jurnal Ilmu Pertanian Indonesia","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139355912","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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