一农作物复合羣体的定义与发展的历史农作物群体就其组成的作物种类而言,可分为单一群体与复合群体两大类。复合群体是在栽培条件下,一定的田块上,由一个以上的作物种类、互相密切联系和互相影响 The definition and development of a crop complex group The history of crop groups in terms of their composition of the crop species can be divided into two groups: single group and composite group. The composite population is cultivated under the conditions of a certain field and consists of more than one crop species, which are closely linked and influence each other