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All Journal Daengku: Journal of Humanities and Social Sciences Innovation Glosains: Jurnal Sains Global Indonesia
Chiska Nova Harsela
Politeknik Siber Cerdika Internasional
Humanities Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Other

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Dose-Response Effects of Liquid Organic Fertilizer Substitution on Growth, Yield, and Nitrate Accumulation of Lettuce (Lactuca sativa L.) in NFT and DWC Hydroponic Systems Chiska Nova Harsela; Indi Millatul Maula
Glosains: Jurnal Sains Global Indonesia Vol. 7 No. 2 (2026): Glosains: Jurnal Sains Global Indonesia
Publisher : Sekolah Tinggi Agama Islam Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59784/glosains.v7i2.732

Abstract

Background: The growing reliance on synthetic inorganic nutrient solutions in hydroponic agriculture poses significant ecological, economic, and food safety concerns, necessitating the evaluation of sustainable organic alternatives that can maintain crop productivity while reducing chemical inputs. Objective: This study determined the optimal LOF substitution ratio for inorganic nutrient solutions in Nutrient Film Technique (NFT) and Deep Water Culture (DWC) hydroponic systems, evaluating effects on plant growth, yield, leaf nitrate accumulation, and solution chemistry in lettuce (Lactuca sativa L.). Methods: A 5 × 2 factorial experiment was conducted with five LOF substitution levels (0%, 25%, 50%, 75%, 100%) across two hydroponic system types (NFT and DWC), using lettuce (Lactuca sativa L. cv. Grand Rapids). Parameters measured included plant height, leaf area index, fresh weight, dry weight, root length, chlorophyll content (SPAD), leaf nitrate concentration, and nutrient solution EC, pH, and dissolved oxygen. Results: The 75% LOF + 25% inorganic treatment (T2) produced statistically equivalent fresh weight (142.3 ± 7.1 g/plant, NFT) to the full inorganic control (148.7 ± 6.4 g/plant; p = 0.312), while reducing leaf nitrate by 34.2% and fertilizer input costs by 50.3%. Full LOF (100%) significantly reduced yield by 39.9% but achieved the greatest nitrate reduction (57.7%). Conclusion: Substituting 75% of inorganic nutrient solution with LOF is agronomically viable, economically advantageous (50.3% cost reduction), and improves food safety in hydroponic lettuce production, supporting circular bioeconomy principles in precision-managed soilless cultivation.
Supply Chain Efficiency Analysis of Rice Commodities in Improving Farmers' Profit Margins in Indramayu Regency Ikhsan Nendi; Chiska Nova Harsela; Feri Hardiyanto; Siti Komara; Anisa Ayu Dwi Lestari
Daengku: Journal of Humanities and Social Sciences Innovation Vol. 6 No. 2 (2026)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.daengku4901

Abstract

This study investigates the supply chain efficiency of rice commodities in Indramayu Regency and its implications for improving farmers' profit margins. Indramayu Regency is one of Indonesia's principal rice-producing regions, yet farmers continue to receive disproportionately low returns due to inefficiencies across the supply chain, including excessive intermediary layers, high post-harvest losses, and weak market integration. This study employs a quantitative approach using survey data from 120 rice farmers and 45 supply chain actors selected through stratified random sampling. Data were collected between January and June 2024. Analytical methods include marketing margin analysis, farmer's share analysis, Supply Chain Operations Reference (SCOR) efficiency scoring, and multiple regression to identify determinants of profit margin. The results show that farmers retain only 42.6% of the final consumer price (Channel III), compared to 68.4% in the shortest marketing channel (Channel I). Supply chain efficiency scores averaged 0.73 across all actors, with rice millers recording the highest efficiency (0.87) and farmers the lowest (0.61). Regression analysis confirms that channel choice, access to milling technology, and cooperative membership significantly improve profit margins. The findings suggest that policy interventions focused on reducing intermediary dependency, strengthening farmer cooperatives, and investing in post-harvest infrastructure can substantially increase rice farmers' income in Indramayu Regency.
Co-Authors Anisa Ayu Dwi Lestari Feri Hardiyanto Indi Millatul Maula Nendi, Ikhsan Siti Komara