Pengaruh Perbandingan Media Tanam Kompos Kulit Biji Kopi dan Pemberian Pupuk NPK (15:15:15) Terhadap Pertumbuhan Bibit Kopi (Coffea arabica L.) di Rumah Kaca

The Influence of Various Ratio of Coffee Hulls Compost Planting Media and NPK Compound Fertilizer (15:15:15) on Growth of Coffee Seedling (Coffea arabica L.) in Greenhouse

Abstract

Penelitian ini bertujuan untuk mengetahui pertumbuhan bibit kopi pada media tanam kompos kulit biji kopi dan pemberian pupuk NPK (15:15:15). Penelitian ini dilakukan di rumah kaca Fakultas Pertanian, Universitas Sumatera Utara, Medan (42 m dpl) pada bulan September 2014 sampai November 2014. Metode percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) faktorial dengan 2 faktor perlakuan yaitu media tanam kompos kulit biji kopi (0, 25, 50, 75 % Kompos) dan pupuk NPK (0; 0,25; 0,5; 0,75; 1 g/polibag). Parameter yang diamati adalah tinggi tanaman, diameter batang, total luas daun, bobot basah tajuk, bobot kering tajuk, panjang akar, bobot basah akar, dan bobot kering akar. Hasil penelitian menunjukkan bahwa perlakuan media tanam kompos kulit biji kopi berpengaruh tidak nyata terhadap semua parameter. Perlakuan pemberian pupuk NPK berpengaruh nyata pada diameter batang, tetapi berpengaruh tidak nyata terhadap parameter lain. Interaksi antara kedua perlakuan berpengaruh tidak nyata terhadap semua parameter.

The aim of this research was to determine the growth of coffee seedling with various ratio of coffee hulls compost planting media and NPK compound fertilizer. Research had been conducted in the greenhouse of Agriculture Faculty, Sumatera Utara University, Medan (42 m above sea levels) in September 2014 until November 2014, by using Randomized Block Design with two factors, i.e. coffee hulls compost planting media (0, 25%, 50%, 75% compost) and NPK compound fertilizer (0; 0,25; 0,5; 0,75; 1 g/polybag). Parameters measured were plant height, stem diameter, total leaf area, fresh shoot weight, wet root weight, root length, dry shoot weight, and dry root weight. The result showed that treatment of coffee hulls compost planting media had no significant effect for all parameter. The treatment of giving NPK compound fertilizer had significant effect on stem diameter at weeks after planting. The interaction of coffee hulls compost planting media and NPK compound fertilizer had no significant effect for all parameters.