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All Journal EduMatika: Jurnal MIPA
Nove Enmia Sidabutar
Universitas Negeri Medan
Chemistry Education Mathematics Physics

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Nutrient characterization of liquid organic fertilizer derived from watermelon rind and growth responses of curly lettuce (Lactuca sativa var. crispa) Nove Enmia Sidabutar; Idramsa Idramsa; Marlinda Nilan Sari Rangkuti; Rani Malau; Marsya Maria Patresia Nainggolan; Imel Selpiana Hasugian
EduMatika: Jurnal MIPA Vol. 5 No. 3 (2025): EduMatika: Jurnal MIPA
Publisher : Lembaga Riset Mutiara Akbar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/emju.v5i3.1652

Abstract

This study characterized the nutrient content of liquid organic fertilizer derived from watermelon rind (LOF) and evaluated curly lettuce (Lactuca sativa var. crispa) growth at four application concentrations. LOF was fermented with EM4 and brown sugar for 14 days. A completely randomized design comprised no LOF (P0), LOF:water ratios of 1:2 (P1) and 1:1 (P2), and undiluted LOF (P3), with three replicates each. Measurements included plant height, leaf number and color, survival, and fresh weight. The fertilizer contained 0.61% organic C, 0.03% total N, 0.04% P?O?, 0.38% K?O, and a C/N ratio of 20.3. At the final observation, P2 had a mean height of 10.25 cm and a mean fresh weight of 0.95 g among surviving plants. Survival was 100% in P1, 66.67% in P2, and 33.33% in both P0 and P3. Total fresh weight was identical in P1 and P2 at 1.90 g. Analysis of yield per experimental unit, coding dead-plant units as zero, yielded F(3,8) = 1.111 and p = 0.400. Fresh weight per experimental unit did not differ significantly among treatments. P2 showed a descriptive advantage in height and surviving-plant fresh weight, whereas P1 had the highest survival rate.
Co-Authors Idramsa Idramsa Imel Selpiana Hasugian Marlinda Nilan Sari Rangkuti Marsya Maria Patresia Nainggolan Rani Malau