近年来,随着全球沙漠化、荒漠化形势的日益严峻,可耕土地越来越少,而我国人多地少的矛盾更加突出,提高复种指数(重茬耕作)是解决问题的唯一办法。但是随之而来的土传病害等重茬病造成作物大面积减产、绝产。重茬 In recent years, as global desertification and desertification have become more and more severe with less and less arable land, and the contradiction between more land and less land in our country has become more prominent, raising the multiple cropping index (re-cropping) is the only solution to the problem. However, subsequent diseases such as soil-borne diseases led to crop large-scale production cuts, abortion. Stubble