The Roles of Bio Organic and NPK Compound Fertilizer to Growth and Production of Four Year Old Oil Palm
Keywords:bio organic, inorganic, organic, vegetative growth, productivity
Organic fertilizers should be combined with inorganic fertilizers to improve the productivity of soil and crops considering their sustainability. The purpose of this research was to study the roles of bio-organic fertilizer and NPK compound fertilizer, and to determine the best combination between the rate of bio-organic fertilizer and NPK compound fertilizer on the growth and production of oil palm of 4 years old. This research was conducted from March 2016 to March 2017. The experimental design used randomized block design, one factor with three replications. The combination of fertilizer were nine treatments, consisted of different combinations were used including bio-organic fertilizer1 to 4 kg. NPK compound fertilizer 3 to 6 kg and 60 kg organic manure fertilizer. The results showed that combination application of bio-organic and NPK compound fertilizers increased plant height, production number of bunches, number of fresh fruit bunches (FFB) and productivity. Combination fertilizer resulted the highest productivity was the treatment of 1 kg of bio-organic fertilizer + 6 kg of NPK compound fertilizer. Application of 4 kg bio-organic fertilizer can reduce 50% NPK compound fertilizer with productivity 20.39 tonof fresh fruit bunches ha-1 year-1.Â
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