Jurnal TANAH TROPIKA (Journal of Tropical Soils), Vol 22, No 2

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Integrated Nutrient Management on Acid Paddy Soil in Karang Tanjung Village, Padang Ratu, Central Lampung

Antonius Kasno, . Irawan, . Husnain, Sri Rochayati

Abstract


Balanced fertilization is the key to improving the efficiency and effectiveness of fertilizer use, which combines inorganic and organic fertilization. Dosage of inorganic fertilizers is based on nutrient status of P and K and rice productivity. Research aims to improve balance fertilization that combines inorganic fertilization based on soil nutrient status and organic matter. The research was conducted in Karang Tanjung village, Padang Ratu sub-district, Central Lampung, in ry season 2009 until 2012. An experimental plot of one hectare using the farmer’s original plot. Generally, every treatment belong three or more farmers. The treatments were set up for the dose of fertilizer management on lowland rice. The treatment consist of (1) farmer practice, (2) dose of Petrokimia fertilizer, (3) 75% of fertilizer dose which create based on the soil analysis combined with composed of straw, and (4) 75% of inorganic fertilizer combine with manure and Biofertilizer. At the fourth season was added with 100% inorganic fertilizer (NPK fertilizer). The results showed that the limiting factor of the soil used was C-organic, N and K nutrient, CEC soil. The compost of rice straw used as organic matter contains C-organic and total N higher than in manure. Organic matter application in the form of straw compost or manure can reduce 25% NPK with the production of rice remains high. Rice production based on soil nutrient status can inprove fertilizer efficiency. Rice production di not differ between the treatment of 100% NPK with the farmer practice and the dosage of Petrokima fertilizer.

Keywords: Acid soil, eficiency fertilizer, nutrient management,


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