Application of Swiftlet Manure Bokashi and NPK Mutiara Fertilizer on the Growth of Oil Palm Seedlings (Elaeis guineensis Jacq.) in the Pre-Nursery
Aplikasi Bokashi Kotoran Walet dan Pupuk NPK Mutiara terhadap Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) di Pre-Nursery
DOI:
https://doi.org/10.24903/ajip.v15i1.4017Keywords:
NPK Mutiara, Oil palm seedling, Pre-nursery, Swiftlet manure bokashi, Vegetative growthAbstract
Oil palm (Elaeis guineensis Jacq.) is a strategic plantation commodity in Indonesia whose production success is largely determined by seedling quality during the early growth phase. Adequate nutrient supply at the pre-nursery stage is decisive for vegetative growth, making the choice of fertilizer type and dose critical. This study aimed to determine the effect of swiftlet manure bokashi, NPK Mutiara fertilizer, and their interaction on the growth of oil palm seedlings in the pre-nursery. The experiment used a factorial Randomized Block Design with three replications, producing 48 experimental units. The first factor was the dose of swiftlet manure bokashi (0; 450; 500; 550 g/plant) and the second was NPK Mutiara (0; 4; 6; 8 g/plant). Plant height, stem diameter, and leaf number were observed at 30, 60, and 90 days after treatment (DAT) and analyzed using ANOVA followed by the LSD test at the 5% level. Bokashi significantly to highly significantly affected all parameters, with the highest dose (B3 = 550 g/plant) giving the best results at 90 DAT (height 23.43 cm; stem diameter 7.28 mm; 5.08 leaves). NPK Mutiara and the interaction had no significant effect. Laboratory analysis confirmed that the bokashi contained 11.07% total N, 30.93% organic C, and a low C/N ratio (2.79). The findings recommend swiftlet manure bokashi as an organic fertilizer derived from local waste for oil palm pre-nursery cultivation
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