Improvement of Snap Beans Yield through the Application of N, P, K and Granule Organic Fertilizers on Inceptisols Soil

Balanced organic and inorganic fertilization is expected to improve low nutrient on Inceptisols to increased snap bean production. The effect of the combination of N, P, K, and granule organic fertilizer on bean harvests was the purpose of this study. The parameters were leaf area index (LDA), shoot-root ratio, the weight of pods, pod length, pod diameter, percentage of the number of pods, marketable and unmarketable,and percentage of pods by quality class. The experiment was conducted in February to April 2016 at Ciparanje Experimental Farm, Faculty of Agriculture, Padjadjaran Univeristy, Jatinangor. The study was conducted using a randomized block design (RBD) with 10 treatments and 3 replications. The experimental results showed that N, P, K fertilizer and granule organic fertilizer (GOF) in the order of Inceptisols significantly affected the weight of pods. Application 50% of the dosage N, P, K fertilizer combined with 50% dosage of granule organic fertilizer resulted in a higher pod weight per plot, which reached 2 439.84 g. Keywords: an organic fertilizer, granule organic fertilizer, leaf area index, quality grade, shoot-root ratio,Pemupukan organik dan anorganik berimbang diharapkan dapat memperbaiki sifat tanah ordo Inceptisols yang cenderung memiliki kandungan nutrisi yang rendah sehingga produksi buncis dapat ditingkatkan. Tujuan dari penelitian ini ialah mengetahui pengaruh dari aplikasi pemupukan N, P, K yang dikombinasikan dengan pupuk organik granul terhadap hasil panen tanaman buncis tegak. Parameternya yaitu indeks luas daun (ILD), nisbah pupus akar, bobot polong per petak, panjang polong, dan diameter polong, persentase jumlah polong layak pasar (LP) dan tidak layak pasar (TLP), persentase jumlah polong berdasarkan kelas kualitas. Penelitian dilaksanakan pada bulan Februari sampai April 2016 di Lahan Percobaan Ciparanje, Fakultas Pertanian, Universitas Padjadjaran, Jatinangor. Penelitian dilaksanakan menggunakan Rancangan Acak Kelompok (RAK) dengan 10 perlakuan dan 3 ulangan. Hasil penelitian menunjukan pemberian pupuk N, P, K dan pupuk organik granul (POG) pada tanah ordo Inceptisols berpengaruh nyata terhadap bobot polong tanaman buncis tegak. Pemberian 50% dosis pupuk N, P, K yang dikombinasikan dengan 50% dosis pupuk organik granul menghasilkan bobot polong per petak yang lebih tinggi, yaitu mencapai 2439.84 g. Kata kunci: indeks luas daun, kelas kualitas, nisbah pupus akar, pupuk anorganik, pupuk organik granu