5Zhang Bai-ping, Yao Yong-hui, Cheng Wei-ming. Human induced changes to biodiversity and Alpine pasture- land in the Baylanbuluk region of the east Tianshan mountains [J]. Mountain research and development. 2002,22(4) : 1-7.
6Fu B J, Chen L D, Ma K M, et al. The relationship between land use and soil conditions in the hilly area of Loess Plateau in northern Shaanxi, China [J]. Catena, 2000,39:69-78.
7Doane J F. Seasonal captures and diversity of ground beetles in a wheat field and its grassy borders in central Saskatchewan[J]. Quaestiones. Entomologicae, 1981, 17: 211-233.
