The results showed the followings. (1)During different periods, the species richnessindex were different under different field management conditions.
结果如下:(1)不同时间不同管理条件下节肢动物群落的种类丰富度不一致。
3
The plant species richnessindex is not positive relevant to species evenness index for which represents the evenness extent of species distribution instead of the quantity of species.