Application of zeolites as slow agent of nitrogen fertilizer
2007
Suwardi, Bogor Agricultural Univ. J1 Meranti Kampus IBP, Damarga, Bogor (Indonesia). Dept. of Soil Science and Land Resource
Zeolites are aluminosilicate minerals having unique cation-exchange properties,molecular sieving and adsorption make these minerals attractive to industrial, environmental, and agricultural utilization, Zeolites have capability to capture ammonium ion(NH4+)so they are possible used as slow-release agent of nitrogen fertilizer. Indonesia has many zeolites deposit spreading Sumatera, Java, Nusa Tenggara and Maluku. Therefore, zeolites are possible used in large scale for agricultural utilization in Indonesia. Nitrogen is the most important nutrient element and the key to increase plant production.However, the efficiency of this element is very low due to ammonia volatilization and denitrification.Pot and field experiments were conducted to evaluate the possibility of zeolites for slow release agent of nitrogen fertilizer as well as how the technical application in the fields .The result showed that addition of zeolites with the ratio of 1:1 increased slightly the grain weight of rice due to increasing panicle number. The increase of rice yield became 17% when the mixture of zeolites and urea was pelletized.
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