近年来，每逢夏收秋收之后，大量的农作物秸秆被农民付之一炬，不仅造成资源的浪费，而且严重污染环境。秸秆中含有氮、磷、钾和微量元素等成份，是一种可以综合利用的资源。秸秆机械粉碎直接还田是秸秆综合利用的一种主要形式，是施肥方式的一次重大改革。其优点，一是增加土 In recent years, after the summer harvest, a large number of crop stalks have been put to the hands of peasants, not only resulting in the waste of resources but also seriously polluting the environment. Straw contains nitrogen, phosphorus, potassium and trace elements and other ingredients, is a comprehensive utilization of resources. Straw mechanical crushing direct return to straw is a major form of comprehensive utilization of straw, fertilization is a major reform. Its advantages, one is to increase soil