CMC 体制是现代绿肥耕作制的简称。它的内容是用绿肥和粮食作物或经济作物进行间、套、插、混作,并用绿肥盘青做追肥利用,大致相当于一般所谓的粮肥间作制,但粮肥间作这个名称不能反映它的全部内容,为简便起见,用几个字母表示,称它为 CMC 体制,字母 C 表示农作物,M 表示绿肥,CM 表示半绿肥作物。CMC 体制广泛的利用绿肥和农作物组成粮肥共生的复合群体,这种土地利用方式是在我国古老的农作物间、套、混作基础上发展起来的,反映了在耕地资源全部被利用以后,农业生产向纵深发展,在多熟制条件下如何维持土壤系统生态稳态的要求。实践己经表明, CMC system is short for modern green manure system. Its content is to use green manure and food crops or cash crops in between, sets, insert, mixed, and use of green manure topdressing fertilizer use, roughly equivalent to the so-called grain and fat intercropping system, but intercropping the name does not reflect it For the sake of simplicity, a few letters indicate that it is a CMC system, the letter C represents a crop, M represents green manure, and CM represents a semi-green manure crop. The CMC system makes extensive use of green manure and crops to form a compound group of grain-fat symbiosis. This land-use pattern was developed on the basis of the ancient crop plants in China. It reflects that after all the cultivated land resources have been utilized, agricultural production To develop in depth, how to maintain the ecological system of soil system in a multi-cooked condition. Practice has shown that,