Respon Pertumbuhan Bibit Kakao (Theobroma Cacao L.) Terhadap Pemberian Kompos Kulit Buah Kakao dan Pupuk NPK (16:16:16)

Abstract

BRIAN PRATAMA DEPARI : Respon Pertumbuhan Bibit Kakao (Theobroma Cacao L.) Terhadap Pemberian Kompos Kulit Buah Kakao Dan Pupuk NPK (16:16:16) dibimbing oleh Ferry Ezra T. Sitepu dan Jonatan Ginting Penelitian dilaksanakan di lahan balai UPT. Balai Benih Induk Palawija Tanjung Selamat, Sumatera Utara pada Oktober 2016 – Januari 2017, menggunakan rancangan acak kelompok faktorial dengan dua faktor yaitu pemberian dosis kompos kulit buah kakao (0, 113, 225, 338 g/polibag) dan dosis pupuk NPK (0, 4, 8, 12 g/polibag). Peubah amatan yang diamati adalah tinggi bibit kakao, diameter batang bibit kakao, jumlah daun bibit kakao, total luas daun bibit kakao, bobot basah tajuk bibit kakao, bobot kering tajuk bibit kakao, bobot basah akar bibit kakao, bobot kering akar bibit kakao, rasio bobot kering tajuk – akar bibit kakao. Hasil penelitian menunjukkan bahwa perlakuan pemberian kompos kulit buah kakao berpengaruh nyata terhadap peubah amatan tinggi tanaman, jumlah daun, diameter batang dan bobot kering tajuk. Pada perlakuan pemberian pupuk NPK berpengaruh nyata terhadap peubah amatan bobot basah tajuk dan bobot kering tajuk. Interaksi antara kedua perlakuan berpengaruh nyata terhadap peubah amatan diameter batang, bobot kering tajuk, dan total luas daun.

BRIAN PRATAMA DEPARI : Growth response seed cocoa (Theobroma cacao L.) against granting compost fruit leather cocoa and NPK (16:16:16) supervised by FERRY EZRA T. SITEPU and JONATAN GINTING. This research had been conducted at experimental field of UPT Balai Benih Induk Palawija Tanjung Selamat, North Sumatra land in October 2016 until January 2017, using factorial randomized block design with two factor, dose of compost fruit leather cocoa fertilizer (0, 113, 225, and 338 gram per polybag) and dose of NPK fertilizer (0 ,4, 8, and 12 gram per polybag). Parameter observed were plant height, stem diameter, number of leaf, summarize of leaf area, fresh weight of shoot, dry weight of shoot, fresh weight of root, dry weight of root and shot root ratio. The result showed response of granting compost fruit leather cocoa fertilizer on cocoa seed significantly effect to plant height, number of leaf, stem diameter, and dry weight of shoot. Response of NPK fertilizer cocoa seed significantly effect to fresh weight of shoot, and dry weight of shoot. Interaction between granting compost fruit leather cocoa fertilizer and NPK fertilizer significantly effect to stem diameter, dry weight of shoot, and summarize of leaf area parameter.