种子包衣是国际上目前处理种子的一项最为重要的技术，它具有农药用量低、防病虫害效果好等特点。在发达国家如瑞士、美国、英国、加拿大等广泛使用，早在五十年代国际上就有关于丸衣或造粒的研究报道，这类种衣剂主要是利用硫酸钙、泥土等物质使种子变大，变圆，有利于精确播 Seed coating is one of the most important technologies for seed treatment in the world. It has the characteristics of low pesticide usage and good pest control effects. In developed countries such as Switzerland, the United States, Britain, Canada and other widely used, as early as the fifties there are reports on the world of pills or granulation of such seed coating agent is mainly the use of calcium sulfate, soil and other substances make the seeds Larger, rounded, is conducive to accurate broadcast