内蒙古武川县农田退耕还草对大型土壤动物群落的影响

用手拣法采集大型土壤动物，应用个体数、类群数、多样性指数等指标分析了内蒙古武川县农田退耕还草管理下大型土壤动物群落的变化.共捕获大型土壤动物49类1479只，隶属于3纲、7目、41科；农田退耕后大型土壤动物的类群数、个体数和生物量均有增加趋势；Margalef丰富度指数(D_Ma)和密度-类群指数(DG)显示，农田退耕还草后大型土壤动物群落多样性明显增加，但由于退耕时间短，Shannon-Wiener多样性指数(H′)和Pielou均匀度指数(E)并不比农田高；不同动物类群对退耕还草的响应不同.退耕后采用紫花苜蓿或紫花苜蓿+蒿属植物的人工种植管理方式较为合适.

Effects of grassland restoration from cropland on soil macrofaunal community in Wuchuan County, Inner Mongolia

By the method of hand-sorting, and using the indices individual numbe
r, group number, and biodiversity, the changes in the soil macrofaunal community
 under the grassland restoration from cropland in Wuchuan County, Inner Mongolia
 were investigated. A total of 1479 soil macrofauna belonging to 3 classes, 7 or
ders and 41 families were captured. After the grassland restoration from croplan
d, the group number, individual number, and biomass of soil macrofauna all had a
n increasing trend, and the biodiversity of soil macrofaunal community reflected
 by DMa and DG increased significantly. However, due to the short term of crop
land rehabilitation, the Shannon-Wiener index H′ and the Pielou evenness index
 E of the soil microfaunal community in grassland were not higher than those in
cropland. Different soil macrofaunal groups had different responses to the grass
land restoration from cropland. The preferable approaches for the grassland rest
oration from cropland were planting Medicago sativa or planting Medicago s
ativa+Artemisia sp.