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新肥种——“CA”肥料浙江农业大学李震华叶继术余杭市农科所姚水根目前,农业生产上化肥利用率氮肥为30%～35%,钾肥为70%～805,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,如何提高肥料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率不同的包膜尿素,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
New fertilizer type - “CA” fertilizer Zhejiang Agricultural University Li Zhenhua Ye Jishu Yuhang Municipal Agricultural Institute Yao Shuigen Currently, the fertilizer utilization rate for agricultural production is 30% to 35%, potassium fertilizer is 70% to 805, and phosphate fertilizer is 15% to 20%. It can be seen that more than half of the fertilizers applied to the fields did not play an economical role, but polluted the environment. Therefore, how to increase fertilizer utilization is a major research topic for the sustainable development of agriculture in China. Urea coated with conventional organic materials and coated with conventional urea to produce coated urea with different nitrogen release rates. Then according to the characteristics of the crop’s demand for fertilizer, various coated urea and phospho-potash fertilizers were blended to produce granular CA fertilizers. , is an important achievement in recent years