Acceleration and improvement of productivity by inorganic and organic fertilizer application for six-year-old mature palm oil

Abstract

The objectives of this research are to study the effect of single fertilizer package, compound NPK fertilizer package, organic fertilizer package, and micro fertilizer package on growth (morphology and physiology), and productivity for six-year-old oil palm. The research was conducted from April 2018 to March 2019 at IPB-Cargill Oil Palm Teaching Farm, Jonggol, Bogor, West Java. The research was designed in Randomized Complete Group with three repetitions. There are eleven treatments: control (P0), 3 kg urea + 2 kg SP-36 + 3 kg KCl + 50 g Borat + 50 g CuSO4.5H2O (P1), 6 kg urea + 4 kg SP-36 + 6 kg KCl + 50 g Borat + 50 g CuSO4.5H2O (P2), 9 kg urea + 6 kg SP-36 + 9 kg KCl + 50 g Borat + 50 g CuSO4.5H2O (P3), 4 kg + 50 g Borat + 50 g CuSO4. 5H2O (P4), 8 kg NPK + 50 g Borat + 50 g CuSO4.5H2O (P5), 12 kg NPK + 50 g Borat + 50 g CuSO4.5H2O (P6), 6 kg urea + 4 kg SP-36 + 6 kg KCl (P7), 8 kg NPK (P8), 6 kg urea + 4 kg SP-36 + 6 kg KCl + 100 kg organic fertilizer (P9), dan 6 kg urea + 4 kg SP-36 + 6 kg KCl + 200 kg organic fertilizer (P10) per plant per year. Data were analyzed with analysis variance, if there was a significant treatment effect, the further analysis using Duncan's Multiple Range Test (DMRT). The result showed that inorganic fertilizer and organic fertilizer package significantly increased stem girth but did not significantly affect other morphologal variables. The treatments of inorganic fertilizer and organic fertilizer package significantly increased effect of variable productivity (production number of bunches, number and weight of fresh fruit bunches (FFB) and productivity). The increased productivity with organic fertilizer package 6,0 kg urea + 4,0 kg SP-36 + 6,0 kg KCl + 100 kg organic fertilizer per plan per year (P9) is the higher effect (265.59%) compared to control.