Jurnal Ilmu Pertanian Indonesia
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Isolasi dan Uji Aktivitas Selulolitik Bakteri Asal Limbah Bagas
Get PDFBagasse is one of the by-products of granulated sugar industries or processed beverages that become waste in the environment. The bagasse will be overgrown by cellulolytic bacteria that produce cellulase enzymes. This study aims to isolate, characterize, and measure bacterial cellulase activity qualitatively and quantitatively. The research phase included isolation and characterization of bacteria, qualitative cellulase activity test, preparing standard curves and bacterial growth curves, crude extract cellulase production, constructing standard glucose curves, quantitative enzyme activity tests, and data analysis. Six isolates with macroscopic characteristics varied in color, elevation, margins, and colony shape; three bacillus isolates, one short bacillus isolate, and two cocci isolates were obtained. All isolates showed positive test results of amylum, triple sugar iron agar, and catalase; five citrate-positive isolates, and three motile-positive isolates. From the cellulase qualitative test, two bacterial isolates had the highest cellulolytic index, namely AT1 (1.79) and BAW3 (1.72) on 0.5% CMC media. The quantitative cellulase test results of the two selected isolates were 0.01176 U/mL for AT1 and 0.01170 U/mL for BAW3, both of which are still classified as low degradation capabilities.
Keywords: cellulase activity, cellulolytic index, Sugarcane wast
Nilai Nutrisi dan Rendemen Ekstrak Metanol Pelet Katuk Depolarisasi sebagai Parameter Standar Mutu Produksi
Get PDFStandardization 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, pelle
Ekonomi Sirkular dalam Pengelolaan Sampah Organik Menggunakan Lalat Tentara Hitam
Get PDFThe problem of organic waste can be solved by applying circular economy principles, namely in waste management using black soldier fly (BSF) maggots. These larvae can decompose organic waste into compost that can be used in agricultural activities. The results of adult larvae can be used as feed in livestock and fish because they contain high protein. The objectives of this study are (1) to identify the amount of organic waste absorption with BSF larval farming business, (2) to analyze the financial feasibility of cultivation in BSF Maggot Cultivation business units in Balaraja and in Tunas, (3) to analyze business efficiency in animal husbandry and fisheries through a circular economy system in the use of BSF larval feed. The research used descriptive-quantitative analysis, financial feasibility analysis, and business efficiency analysis. The results showed that the amount of waste absorption from larval farming business activities reached 430.7 tons/year, with the total land area needed for cultivation being 137,855 m2. The results of the business financial feasibility study show that the Tunas and Balaraja Units are feasible because they have met the eligibility criteria for NPV > 0, Net B/C > 1, IRR > interest rate, and PP > the life of the project. Business efficiency proves that fisheries and livestock business activities integrated into BSF larval cultivation are more efficient in spending on the cost of commercial feed used and provide higher profits in their businesses.
Keywords: business efficiency, BSF, circular economy, financial feasibility, maggot black soldier fly, organic wast
Determinan Kesejahteraan Petani Tanaman Pangan di Provinsi Jawa Barat
Get PDFEvery year, West Java Province becomes the third largest rice-producing province in Indonesia, with a production of 9.43 million tons in 2022. However, this condition is inversely proportional to the welfare of food crop farmers when viewed from the exchange rate of food crop farmers (NTPTP), which in the last two years has been below 100%. The purpose of this study is to evaluate the effect of rice crop production, rice crop productivity, the selling price of dry milled grain, production costs, and additional capital on NTPTP in West Java. Secondary data were obtained from the Central Bureau of Statistics and the Directorate General of Food Crops, Ministry of Agriculture, from 2010–2022. Multiple linear regression analysis is used to examine the determinants of the welfare of food crop farmers. The findings of this study show that the selling price of dry-milled grain has a significant effect on increasing NTPTP. In contrast, rice crop production, productivity, production costs, and capital increases are not. The selling price of dry-milled grain influences the welfare of food crop farmers in West Java. Government policymakers can use this study in the agricultural sector to overcome the high expenditure of farmers\u27 production costs by providing subsidies on target and maintaining the cost of goods sold for rice for the welfare of farmers in West Java.
Keywords: price of dry grain, exchange rate of food crop farmers, paddy production, paddy productivity, multiple linear regressio
In Vitro Evaluation of Trichoderma spp. against Sugarcane Eye Spot Disease (Bipolaris sp.)
Get PDFSugar cane (Saccharum officinarum L.) is the main ingredient in sugar production. Sugarcane is widely cultivated in warm and tropical areas and is widely used as a sweetener because it contains a lot of fructose and glucose. National sugar production shows a decline, the majority of which is caused by pathogens, especially the fungus Bipolaris sp. capable of producing up to 85% damage per Ha if no control is applied. Biological control using Trichoderma spp. can control this pathogen and is able to promote sugarcane growth. The purpose of this study was to determine the effectiveness of Trichoderma spp. in controlling Bipolaris sp. in vitro. The results showed isolates TD1, TD2, TD3 were able to inhibit Bipolaris sp. antagonistically and volatilely, the antagonist test showed a result of 86% (TD1) while the volatile test of 65% (TD2). Conclusion Trichoderma spp. can inhibit the growth of Bipolaris sp. on an in vitro scale.
Keywords: BCA, Bipolaris sp. Trichoderma spp.
ABSTRAK
Tebu (Saccharum officinarum L.) merupakan bahan utama dalam pembuatan gula. Tebu banyak dibudidayakan didaerah hangat dan tropikal dan banyak digunakan sebagai pemanis dikarenakan mengandung banyak fruktosa dan glukosa. Produksi gula nasional menunjukan adanya penurunan yang mayoritas disebabkan oleh patogen terutama jamur Bipolaris sp. yang mampu menghasilkan kerusakan hingga 85% per Ha jika tidak diberlakukan pengendalian. Pengendalian biologis menggunakan Trichoderma spp. dapat mengendalikan patogen ini dan mampu mendorong pertumbuhan tebu. Tujuan penelitian ini ialah untuk mengetahui efektivitas Trichoderma spp. dalam mengendalikan Bipolaris sp. secara In vitro. Hasil menunjukkan isolat TD1, TD2, TD3 mampu menghambat Bipolaris sp. secara antagonis dan volatile, uji antagonis memperlihatkan TD1 memiliki hasil 86% sementara uji volatile TD2 memiliki hasil 65%. Kesimpulan Trichoderma spp. dapat menghambat pertumbuhan Bipolaris sp. dalam skala In vitro.
Kata kunci: APH, Bipolaris sp. Trichoderma spp
Kombinasi Fermentasi Bakteri Asam Laktat dan Pemanasan Bertekanan-Pendinginan dalam Pembentukan Pati Resisten Tepung Talas Beneng (Xanthosoma undipes K. Koch)
Get PDFThe study aimed to determine the effect of lactic acid bacteria, fermentation time, and pressurized heating-cooling cycle on the formation of resistant starch content of beneng taro (Xanthosoma undipes K. Koch) flour. The materials used were beneng corm, isolates of lactic acid bacteria Lactobacillus casei and Streptococcus thermophilus, and MRSB media. The experimental design was randomized block design factorial with two factors: fermentation time (0, 18, and 24 hours) and pressurized-cooling heating (1, 2, and 3- cycles) in 3 replicates. The data were analyzed using analysis of variance and if necessary continued with Duncan\u27s Multiple Range Test at a level of 95%. The tested parameters were the content of resistant starch, amylose, and amylopectin and the data were treated using variance of analysis. The results showed that the combination of L. casei and S. thermophillus produced the highest resistant starch content of 5.66%. Fermentation time of 18 and 24 hours produced resistant starch content of 4.46% and 4.51%, respectively. Autoclaving-cooling of 1-, 2-, and 3-cycle produced a similar type of resistant starch of 3.81%, 4.26%, and 4.16%, respectively. Therefore, the combination of L. casei and S. thermophillus fermented in 18 hours and 1-cycle of autoclaving-cooling is recommended to produce resistant beneng taro flour starch content.
Keywords: fermentation, autoclaving-cooling, resistant starch, taro beneng, Xanthosoma undipes K. Koc
Determinan Terpilih untuk Kualitas Air Embung pada Lahan Tadah Hujan di Karanganyar, Jawa Tengah
Get PDFWater conservation is needed to overcome the shortage of irrigation water through harvesting rainwater on rainfed land using small farm reservoir. Intensive agricultural activities cause a reduction in land resources which disrupts hydrological functions (water quantity and quality). This study aims to determine the selected parameters for small farm reservoir water quality and identify water quality based on irrigation water standards according to FAO (1994) and PP No. 82 of 2001. The research was conducted from March to December 2014 in Karanganyar Regency, Central Java Province. This study used a descriptive exploratory survey method with purposive sampling. Water quality data was analyzed using Principal Components Analysis (Multivariate Test) MINITAB 16 to determine the main components as the selected determinants. Furthermore, based on the results of the PCA analysis, 5 variables were obtained whose eigenvalue proportions met the main criteria, including DHL of 0.467; SAR of 0.542; pH of 0.538; Actual Savings Ratio (ASR) of 0.662; and water-air temperature deviation of 0.612. Furthermore, a match is made between the selected determinant measurement data and the water quality standard. The results of matching to the selected determinants for water quality in the reservoir have met the water quality standards for irrigation based on FAO (1994) and Government Regulation no. 82 (2001). The soil characteristics of the catchment area also affect water quality because in rainwater harvesting, surface runoff in the catchment area will flow and be accommodated by the small farm reservoir.
Keywords: water quality, small farm reservoir, PCA, water conservation, rainfall harvestin
Produktivitas dan Pola Musim Tangkap Ikan Peperek (Leiognathus spp.) di Teluk Banten
Get PDFPonyfish (Leiognathus spp.) is one of the dominant types of fish landed at the Nusantara Fishing Port (PPN) Karangantu. Its high-intensity fishing activities are feared to cause future problems with the sustainability of ponyfish resources. This study aims to calculate fishing productivity, sustainable optimal fishing effort, maximum sustainable catch, and determine the pattern of fishing season in Banten Bay. The research was conducted from April to June 2021 at PPN Karangantu. The fishing gear analyzed were fixed lift nets, floating lift nets, and seine nets. Fishing productivity was calculated from catch per unit effort; the maximum sustainable catch was analyzed using the Schaefer, Fox, and Walter-Hilborn regression models. The seasonal pattern of the ponies was determined from the Fishing Season Index. The results showed that pony fishing productivity in PPN Karangantu decreased from 2016 to 2020. The optimum fishing effort value and the optimum catch through the Schaefer model were 2088 trips/year and 276.12 tons/year, respectively; the highest fishing season occurred in November (145.5%) and the lowest in May (70.2%). Based on the analysis of the Schaefer, Fox and Walter-Hilborn models, the exploitation of Ponyfish (Leiognathus spp.) in Banten Bay can be said to be over-exploited.
Keywords: catching season, Banten bay, Leiognathus spp., productivit
Efek Amelioran pada Pertumbuhan dan Produksi Tanaman Jagung Manis
Get PDFAmeliorant is a substance that can increase soil fertility by improving the soil\u27s 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 p
Efektivitas Kapal KM Camara Nusantara dalam Pelayanan Angkutan Ternak
Get PDFIn 2021, the realization of livestock transported by KM Camara Nusantara livestock ships only reached 67.73%, with the realization of shipping at 78.74%. Based on these conditions, this study aims to measure the effectiveness of implementing livestock ships and the factors that affect them. The method used was to calculate the weight of factors considered to affect using the Analytical Hierarchy Process. Data were obtained from questionnaires, interviews, and literature reviews. Respondents were stakeholders and users of livestock transportation vessel services, which include the NTB and NTT Provincial Livestock Offices, Bima Regency Livestock Office, the Ministry of Transportation, shipping operators, and business actors. The results are priority weights on benefit criteria (0.2648), number of livestock (0.2578), regulation (0.1716), and route (0.1541). Meanwhile, priority weights on the subcriteria of the number of livestock transported (0.2224), availability (0.1064), price disparity (0.0889), mileage (0.0677), and transportation socialization (0.0667). Based on the calculation of the weight of criteria and subcriteria, the effectiveness of implementing KM Camara Nusantara livestock vessels reached 78%, which is at the level of achievement that is quite effective. In general, to improve the effectiveness of KM Camara Nusantara livestock transport ship services, factors that need to get priority are the availability of transported livestock, the achievement of benefits, and supporting regulations. The subfactors that need priority are the number of livestock transported, availability, price disparity, mileage, and transportation socialization.
Keywords: AHP, Camara Nusantara, cattle ships, Sea Highwa