RESPON PERTUMBUHAN TANAMAN CAISIM (Brassica juncea L.) TERHADAP PEMBERIAN PUPUK ORGANIK AMPAS KOPI

AFRILIA, SISKA YANTI (2025) RESPON PERTUMBUHAN TANAMAN CAISIM (Brassica juncea L.) TERHADAP PEMBERIAN PUPUK ORGANIK AMPAS KOPI. Diploma thesis, UIN Raden Intan Lampung.

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Abstract

ABSTRAK Budidaya tanaman caisim (Brassica juncea L.) sering mengalami penurunan produktivitas, ditandai dengan daun menguning. Salah satu solusi berkelanjutan untuk mengatasi masalah ini adalah pemanfaatan limbah organik seperti ampas kopi sebagai pupuk. Penelitian ini bertujuan untuk mengetahui pengaruh pupuk ampas kopi terhadap pertumbuhan caisim dan menentukan dosis terbaik. Penelitian dilakukan secara eksperimental menggunakan Rancangan Acak Lengkap (RAL) dengan lima dosis: P0 (0%), P1 (25%), P2 (35%), P3 (45%), dan P4 (55%), masing-masing diulang lima kali. Pupuk dibuat melalui fermentasi ampas kopi dengan EM4. Parameter yang diamati meliputi tinggi tanaman, jumlah daun, berat basah, serta karakteristik kuantitatif pH dan suhu. Data dianalisis dengan ANOVA dan uji Duncan (α = 5%). Hasil menunjukkan pupuk ampas kopi berpengaruh nyata terhadap semua parameter. Dosis 25% (P1) menghasilkan jumlah daun dan berat basah tertinggi, sedangkan dosis lebih tinggi menurunkan efektivitas. Kesimpulannya, pupuk ampas kopi efektif meningkatkan pertumbuhan caisim, dengan dosis optimal 25% untuk hasil maksimal dan mendukung pertanian berkelanjutan. Kata Kunci: Limbah Ampas Kopi, Tanaman Caisim, EM4, Pertumbuhan Tanaman, Pupuk Organik. ABSTRACT Cultivation of Chinese cabbage (Brassica juncea L.) often experiences decreased productivity, characterized by yellowing leaves. One sustainable solution to address this problem is the use of organic waste such as coffee grounds as fertilizer. This study aimed to determine the effect of coffee grounds fertilizer on Chinese cabbage growth and determine the optimal dosage. The study was conducted experimentally using a Completely Randomized Design (CRD) with five dosages: P0 (0%), P1 (25%), P2 (35%), P3 (45%), and P4 (55%), each replicated five times. The fertilizer was made by fermenting coffee grounds with EM4. Observed parameters included plant height, number of leaves, fresh weight, pH, and temperature. Data were analyzed using ANOVA and Duncan's test (α = 5%). The results showed that coffee grounds fertilizer significantly affected all parameters. A dosage of 25% (P1) produced the highest number of leaves and fresh weight, while higher dosages decreased effectiveness. In conclusion, coffee grounds fertilizer effectively increases Chinese cabbage growth, with the optimal dosage of 25% for maximum yield and support for sustainable agriculture. Keywords: Coffee Grounds Waste, Caisim Plants, EM4, Plant Growth, Organic Fertilizer.

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