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目前,农业生产上化肥利用率:氮肥为30%～35%,钾肥为70%～80%,磷肥为15%～20%。可见,施入田间的肥料有一半以上没有发挥经济效益,反而污染了环境。因此,如何提高化肥利用率是我国农业持续发展的一项重大研究课题。利用高分子有机材料、包膜常规尿素制成氮素释放速度不等的包膜尿素,然后再根据作物需肥特点,按比例将多种包膜尿素、磷钾肥掺混制成颗粒型的CA肥料,是近年来的一项重要成果。CA肥料是90年代国际上推出的新一
At present, the rate of fertilizer utilization in agricultural production is 30% -35% for nitrogen fertilizer, 70% -80% for potash fertilizer, and 15% -20% for phosphate fertilizer. Can be seen that more than half of fertilizer applied to the field did not play a economic benefit, but pollute the environment. Therefore, how to improve the utilization of chemical fertilizers is a major research topic in the sustainable development of agriculture in our country. The use of polymer organic materials, coated conventional urea made of urea nitrogen coated urea at varying rates of release, and then according to the characteristics of crops need fertilizer, a variety of coated urea, phosphorus and potassium fertilizer made of granular CA Fertilizer, is an important achievement in recent years. CA fertilizer is a new international launch in the 90s