CD Skripsi
Pengaruh Pemberian (POC) Limbah Ikan Patin Terhadap Biomassa Lemna Sp. Dalam Media Pemeliharaan Ikan Tambakan (Helostoma Temminckii) Pada Air Gambut
Peat water is acidic and nutrient-poor, thus less supportive for aquatic organisms. Lemna sp. has potential as both a phytoremediator and natural feed, but its growth depends on nutrient availability. Catfish waste can be fermented into liquid organic fertilizer (POC), which is rich in nitrogen, phosphorus, and potassium. This study aimed to examine the effect and optimal dosage of catfish-waste POC on the biomass of Lemna sp. in peat water used for rearing kissing gourami (Helostoma temminckii). The research was conducted for 30 days, from March to April 2025, at the Environmental Quality Laboratory of Aquaculture, Faculty of Fisheries and Marine Science, University of Riau. The purpose of this study was to determine the appropriate dosage of catfish-waste POC for increasing Lemna sp. biomass in peat water fish-rearing media, while its significance lies in developing knowledge on utilizing catfish waste as an eco-friendly fertilizer to enhance peat water qualityand support aquaculture. The experimental method used a Completely Randomized Design (CRD) with five treatments and three replications. The treatments were: P0 (control, without POC), P1 (1.75 mL/L), P2 (2.0 mL/L), P3 (2.25 mL/L), and P4 (2.5 mL/L). The best result was obtained in treatment P3 (2.25 mL/L), with water quality values of temperature 26–30.4℃, pH 3.8–7.2, dissolved oxygen 4.54–7.37 mg/L, nitrate 0.39–15.86 mg/L, phosphate 3.06–6.05 mg/L, and CO₂ 5.0–10.0 mg/L. This treatment also produced a biomass increase of Lemna sp. was 107.6 grams, the specific growth rate of Lemna sp. was 5.05%, the absolute weight increase of tambakan fish was 2.98 grams, the absolute length was 2.30, the specific growth rate was 1.18%, and the survival rate of tambakan fish was 93.3%.
Keywords: Lemna sp., Catfish Liquid Organic Fertilizer, Tambakan
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