ICREASING FERTLIZER USE EFFICIENCY BY MEANS OF CONTROLLED RELEASE FERTILIZER (CRF) PRODUCTION ACCORDING TO THEORY AND TECHNIQUES OF BALANCED FERTILIZATION
Abstract:Fertilizer and fertilization are Still two important factors affecting agricultural production in China at present. The contribution of inorganic fertilizer to the production is about 30% to 40%, and the payment of the fertilizer consist of about 50% of the total investment of the farmers. However, the fertilizer use efficiency(FUE) is low, accounting for 30% to 35%, 10% to 20%, and 35% to 59% for N, P and K, respectively. It is clearly that how to rise the FUE is of great significance to the development of economy and agriculture in China. Our investigation results prove that the possible and efficient way to increase the FUE is to produce CRF, which will be the carrier of the balanced fertilization theory. The nutrients supplying rate (slow and fast release) can be controlled by use of the CRF.The balanced fertilization theory will be easily applied by farmers for they need only to use the carrier, meanwhile the theory and technique of balanced fertilization will be put forward to industrialization.