一、发病抑制型土壤的定义旱地土壤连种同一种作物,不久就会发生土壤传染性病害(以下简称土传病),导致减产和品质下降。但是,人们往往发现在发病地区或相邻地区,存在一些几乎不发病的田块。弄清它们的机制,就可以通过生态或生物途径来防治土传病。对于上述那种土壤 First, the definition of disease-inhibiting soil Dryland soil even with the same crop, soil infectious diseases will soon occur (hereinafter referred to as soil-borne disease), resulting in reduced production and quality decline. However, it is often found that there are some fields that are scarcely affected in the area of ​​disease or adjacent areas. To understand their mechanisms, we can control soil-borne diseases through ecological or biological approaches. For the kind of soil above