Jurnal Ilmu Pertanian Indonesia
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The Impact of Fedtugrow® Downstreaming with SPR Integration in Central Lampung Regency Using SROI
Full text linkThe dissemination of research findings (innovation) in universities would have a social and economic impact on the larger community. IPB developed the depolarized katuk invention (known as Katulac), which was patented (P00201800110, Jan 5, 2018). IPB collaborated with the Local Government of Central Lampung Regency, PT Great Giant Livestock (GGL), and community farms named Hipermadani (downstreaming of university innovation for the community and farmers) in downstreaming Fedtugrow (innovation in combined livestock feed Katulac® and concentrate) to improve farmer welfare. Katulac®\u27s downstream innovation is the School for Smallholder Livestock Farming (Sekolah Peternakan Rakyat, SPR), an IPB innovation with copyright (EC00201987765, Nov 28, 2019). The Katulac® downstreaming initiative with SPR institutional integration resulted in a social investment of IDR 501,837,278 and a net social benefit of IDR1,488,959,391 for all stakeholders in the Hipermadani ecosystem. This program had a Social Return on Investment (SROI) of 2.97, which means that for every IDR 1 invested, it would deliver a social benefit of IDR 2.97, showing the program\u27s success.
Keywords: downstreaming, Hipermadani, innovation, Katulac, Social Return on Investmen
Mapping the Potential Use of Peat Land to Formulate a Management Strategy for Smallholder Palm Oil Plantations
Full text linkBy 2030, smallholder plantations will account for 60% of the total oil palm plantation cover. Currently, 40% of smallholder oil palm farms in Indonesia have low productivity and are located in peatlands. The result is that increasing land productivity requires taking into account the maturity, thickness, and depth of the groundwater table. The study\u27s goals were to identify many characteristics of peatlands in smallholder plantations, to create a map of potential peatland use, and to build a strategy for smallholder oil palm farms based on peat potential maps. The peatland mapping units was determined on a combination of soil type maps, peat maturity maps, and peat thickness maps. Observations and extra sampling at each land mapping unit (LMU) were conducted using a random survey method to stratify 20 observation sites and soil physical property samples. The strategy formulation technique employed a SWOT analysis, which was evaluated by key informants. The study found that (1) the characteristics of peat in each LMU show relatively similar properties, namely having low bulk density, high groundwater content, and porous porosity, (2) there were 5 LMUs based on maturity, thickness, and groundwater level, and (3) the strategy consists of efforts to improve the quality of the water management system to overcome the depth of the groundwater level that exceeds the required limit, overcome the depth of irrigation channels that exceed the maximum depth, increase the use of fertilizer according to the recommended dose to increase oil palm production
Quality and Antioxidant Activity of Arrowroot (Maranta arundinaceae L.) Tuber Accessions Collected from Java Island
Full text linkArrowroot (Maranta arundinaceae L.) is a starch–producing plant that can potentially be used as an alternative substitute for wheat flour. Additionally, arrowroot can serve as a functional food, as it is not only a source of nutrition but also provides health benefits such as improving digestion and regulating blood sugar levels. Arrowroot tubers contain high levels of carbohydrates and bioactive phenolic compounds that function as antioxidants. Currently, no data is available on the nutritional content and antioxidant activity (DPPH assay) of arrowroot tubers from various regions of Java Island. This study aimed to analyze the quality and antioxidant activity of arrowroot tubers obtained from several locations in Java. The results of the proximate analysis (moisture and ash contents) showed that the lowest moisture content was in the Banjar 1 accession (3.44%), while the highest was in the Sragen 3 accession (12.47%). The Banjar 2 accession had the highest ash content (8.94%), while the Sragen1 accession had the lowest (3.98%). The antioxidant activity was indicated by the IC50 value, which is the concentration of the sample solution required to inhibit 50% of DPPH free radicals. Antioxidant activity analysis revealed that the Malang 1 accession had the lowest IC50 value of 163.16 ppm, indicating the highest antioxidant potential.
Keywords: 1,1–diphenyl–2–picrylhydrazyl, antioxidant, arrowroot, phenol, phytochemical
Stakeholder Analysis of Livestock Beef Demand in Samarinda City
Full text linkStakeholder analysis is required to determine the roles of each stakeholder in satisfying the meat supply needs of Samarinda City, East Kalimantan Province. The purpose of this study was to assess and categorize the influence and interests of stakeholders in the beef cattle supply chain. Primary data was collected via a survey method, involving questionnaires and interviews with 49 respondents representing farmers, slaughterhouses, government officials, traders, and consumers. A stakeholder analysis was carried out utilizing an influence−interest matrix. The results indicated two main groups: Farmers and traders are major stakeholders in the meat supply chain, with enormous power and interest. In contrast, the mob, which includes customers, the government, and slaughterhouses, has significantly less power and interest. Farmers, as primary producers, and traders, as mediators between customers, play critical roles in guaranteeing meat availability and quality. While the government has regulatory power, its role as a facilitator must be expanded to encourage stakeholder participation. This study provides collaborative solutions for aligning stakeholders\u27 views and objectives with the goal of enhancing beef availability and quality in Samarinda City.
Keywords: beef, influence-interest matrix, Samarinda City, stakeholders, supply chai
Strengthening Farmer Institutions in Rice Farming: An Interpretive Structural Modeling Approach
Full text linkThe primary issue in farmer institutional management is managerial and financial competency, which impedes the efficacy and sustainability of farm companies. To enable long-term agricultural development, institutions must be strengthened through collaboration. The purpose of this study was to determine the institutional function of farmer institutions in boosting rice farming productivity and to examine a plan for institutional improvement of farmer institutions in rice farming using Interpretive Structural Modeling (ISM). Purposive sampling was utilized to choose 21 farmers and 5 stakeholders from a population of 150 farmers, resulting in a sample size of 26 persons. The data analysis technique utilized was a Likert scale using ISM. The findings revealed that farmer institutions play a positive influence in enhancing rice farming production, particularly in terms of expanding knowledge and market access. Through expanded knowledge, farmer institutions provide training and extension services that focus on current rice farming techniques, fertilizer efficiency, and agricultural technology application. The technique of developing farmer institutions in rice production using ISM analysis is a critical component of resource availability and financial support. This research is prioritized because it has a substantial impact on the success of farming institutions. This study emphasizes the relevance of farmer institutions in ensuring access to resources and financial support to improve rice yield, efficiency, and competitiveness while also supporting farmers\u27 well-being.
Keywords: financial support, institutional role, rice farming, strateg
Purification of Kurisi (Nemipterus nematophorus) Fish Oil Derived from Surimi Processing Products
Full text linkKurisi fish oil is a promising omega–3 fatty acid source, particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). In Indonesia, this oil is commonly obtained from a surimi processing industry product. It is predominantly utilized as an additive in animal feed due to its failure to meet the quality standards required for human consumption. Therefore, purification is essential to enhance its quality and broaden its potential applications as a food–grade oil. This study evaluated the effectiveness of two purification methods: (A) a three–step process involving degumming, neutralization, and bleaching; and (A+), which includes winterization following the A process. The study commenced with the characterization of crude kurisi fish oil, followed by applying both purification techniques. Quality parameters analyzed included free fatty acids (FFA), peroxide value (PV), acid value (AV), p–anisidine value (p–AnV), total oxidation value (totox), and fatty acid composition. The results indicated that both purification methods significantly reduced oxidative degradation indicators. Notably, the A+ method yielded the most favorable results, achieving a polyunsaturated fatty acid (PUFA) content of 33.69% and demonstrating superior oxidative stability. These findings suggest that the A+ purification method effectively enhances the quality of kurisi fish oil, supporting its potential use as a functional food ingredient.
Keywords: kurisi fish oil, omega–3, oxidation, fish oil purification, winterizatio
Condition Factor and Gonadosomatic Index Study of Nilem (Osteochilus hasselti) Catch in Teluk Lake, Jambi
No full textThe nilem fish (Osteochilus hasselti) is one of the most easily caught fish in Teluk Lake. Currently, cage farming activity in the lake slightly exceeds the water carrying capacity, which is suspected to affect the life of fish in the lake, including nilem. This study aimed to determine the condition factor and Gonadosomatic Index (GSI) of the nilem catch in the lake. This study was conducted from August to September 2023 in Teluk Lake. This research used a survey method with simple census sampling techniques. The analysis of the length-weight relationship of nilem fish obtained from Teluk Lake showed a positive allometric relationship with a value of b = 3.7148. It showed that the increase in body weight of nilem fish was not linear with the increase in length. The catch results by fishermen for nilem fish found a male-to-female sex ratio of 1:2.15, with 90% of the captured fish in a mature gonad condition. The GSI for females ranged from 3.20% to 8.33% and for males, from 0.03% to 28.89%. The first maturation size (Lm) for male fish was 125.847, with a size class range of 116–126 mm. For female fish, the first maturation size calculation resulted in 112.996 with a size range in the 104–113 mm class. Lm is smaller than the average size of the captured fish, indicating that it is safe to catch, and there is a low likelihood of recruitment overfishing.
Keywords: GSI, Lm, Osteochilus hasselti, positive allometric, Teluk Lake.Top of FormBottom of For
Bioconversion of Microalga Chlorella sp. as an Alternative Energy for Biofuel in Fishery Waste Media
Full text linkCarbon dioxide emissions from burning fuel oil have been increasing, resulting in increasingly severe climate change. The use of microalgae as raw materials for biofuel production is an environmentally friendly alternative. Microalgae Chlorella sp. can be sustainably converted into alternative biofuels. Fishery liquid waste, such as that resulting from fish farming and fish processing, can be used as a nutrient medium for microalgae. This study aimed to analyze biomass production from Chlorella sp. using fishery waste in an algae reactor. The working principle of fisheries wastewater processing is related to microalgae in the reactor. The surface of the media forms a biological layer that breaks down organic compounds in the air, thereby reducing the organic content. The compounds resulting from metabolic processes are in the form of solids and gases. The results show that the bioethanol produced from the thermostat Chlorella sp. with fishery waste media can produce 20,000 L/ha. Microalgae contain approximately 20-50% dry weight of carbohydrates, which can be converted into bioethanol. Chlorella sp. can reduce chemical oxygen demand and ammonia by up to 70% by converting carbon dioxide into carbohydrates, fats, and proteins. The application of bioconversion to all companies in the fisheries sector will provide benefits and help the government reduce fossil fuel subsidies.
Keywords: bioconversion, biofuel, fisheries, microalgae, wast
The Impact of Biochar and FeCl3 Administration on Fe Toxicity Symptoms and Productivity of Bok Choy Mustard Plants (Brassica rapa L.) Nauli Variety
Full text linkFe³⁺ pollution is a factor that reduces bok choy production. Its productivity can be increased by adding biochar, which can adsorb inorganic ions, including iron. This study examines the impact of rice husk biochar and FeCl₃ on bok choy productivity, using a completely randomized design with a 3´3 factorial pattern. The first factor was the concentration of rice husk biochar (0, 2.5, and 7.5 g/kg), and the second was the concentration of FeCl₃ (0, 25, and 50 mg/L). The criteria measured were the number of leaves, leaf area, chlorophyll content, and vitamin C levels. The combination of 0 g/kg biochar and 0 mg/L FeCl₃ proved to be the most effective treatment for boosting bok choy growth. The treatment yielded 12.6 leaf count, 73.3 cm² leaf area, 2.0 mg/g chlorophyll, and 30.8 ppm vitamin C. Fe³⁺ treatments at 25–50 mg/L drastically lowered all growth metrics. The applied biochar doses were insufficient to efficiently absorb Fe³⁺ and boost the yield of bok choy.
Keywords: biochar, bok choy, chinese mustard, FeCl3, toxicit
Competitiveness of the Local Corn ‘Manding’ Post the 2022 Fertilizer Subsidy Policy Change
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The agribusiness of food commodities in the Manding District is dominated by local corn. Over 90% of the farmers in the district regularly cultivate Manding variety corn as an alternative crop, planting it at least once a year. The change in the fertilizer subsidy policy in 2022 caused several problems in the district, including a reduction in the availability of fertilizer for farmers due to purchasing quota limitations. This condition leads to unmet fertilizer needs, prompting farmers to purchase non-subsidized fertilizers to cover the shortfall. Consequently, production costs increase significantly. Another issue is the delay in the distribution of subsidized fertilizer, which can affect crop growth and productivity. This situation can impact the competitiveness of corn commodities. This study aims to analyze the impact of government policies on corn commodities and the competitiveness of local Manding corn, considering comparative and competitive advantages. The study area was selected purposively, and 42 corn farmers were chosen as respondents using purposive sampling. Data analysis was conducted using the Policy Analysis Matrix. Based on the analysis, it was found that the government\u27s fertilizer policy could help save costs. Meanwhile, the pricing policy resulted in farmers receiving lower prices than before. Overall, Manding local corn farming in Manding District maintains both competitive and comparative advantages. This is evidenced by the Private Cost Ratio and the Domestic Resource Cost Ratio, both of which have values less than one.
Keywords: competitiveness, corn, government policy, Manding cor