Characteristics of Soil Macrofauna and Its Coupling Relationship with Environmental Factors in the Loess Area of Northern Shaanxi

Even with the in-depth implementation of forestry ecological projects, such as restoring farmland to forest (grass) in loess area northern Shaanxi, characteristics soil macrofauna communities and their coupling relationship environmental factors after vegetation restoration study are yet obscure. However, community great significance for evaluating effectiveness area. Therefore, aims reveal relationships environment Shaanxi. In this study, all organisms five typical types were collected by manual sorting (Armeniaca sibirica Populus simonii mixed (M), Robinia pseudoacacia (P), (S), hopeiensis (H) Hippophae rhamnoides (R)), adjacent abandoned grassland (G) was used a control group. The group number individual different studied, following conclusions drawn. (1) shows that there certain differences area, which include significant alkaline nitrogen content various (p < 0.05). (2) effects on different. There no structure between Armeniaca forest, pseudoacacia, hopeiensis, but large difference from grasslands. density significantly higher than 0.05), other indexes showed differences. Shannon–Wiener index much lower (3) diversity mainly affected pH, nitrogen, potassium available, coverage litter production. (4) Different groups closely related reacted differently factors, coverage, production key affecting composition communities.