Ma Sanbao, Wang Caiqin, Zhou Yan, Meng Mei and Jin Xiaoli

(Suide Water and Soil Conservation Test Station, YRCC; Yulin, Shaanxi, 718000 )

Abstract: In ecological constructions in small watershed, the results of test of soil physical chemistry characters at different terrain and vegetation measures reflect directly the factors that influence the changing of soil physical chemistry indexes and moisture.The research shows that,ecological constructions efficiently prevent the soil degenerate succession and promote land sustainable usage.

Key wards: soil research, soil degenerate, ecological constructions, the Loess Plateau, soil physical chemistry indexes