Effects Of Grazing On Soil Properties Of Grassland And Forest Land In Hilly And Gully Regions On The Loess Plateau

To a large extent, control soil and water losses and establish benign eco-environment on Loess Plateau depending on reparation of vegetation overlay environment with priority to forest and grassland. However, there is an"inherent historically"contradiction between destroy vegetation construction is unallowed and stockbreeding production of look vegetation as producer, goods. To harmonize and solve essentially the contradiction between vegetation construction and stockbreeding development, and wellhandled really the relation of eco-environment construction and economic development, to solve the guarantee of problem"ecosystem carrying capacity of livestock"is key, that is, to solve the problem of"degree"in stockbreeding development. Moreover, to ascertain the standard of"degree", orientation research deeply and systematically is a unsurpassable premise.Aimed at the requirement of how harmonize the contradiction forest-herd and how to bring simultaneity of vegetation construction, eco-environment improvement, stockbreeding steadily development in Loess Plateau Hilly and Gully Regions, According to the thing of types of vegetation of grazing in the area's ecosystem environmental reparation, testing land was selected in the slope 20°～30°of forest land of C.korshinkii and grassland of A.adsurgens, and set up 48 grazing test plots and 6 CK plots(each plot was separate in wiry enclosure), with observation continuously for three years, taking on soil physical and chemical properties and soil anti-erodibility of the surface layer (0~10cm) to different types of livestock, different grazing intensities and different types of vegetation for grazing test as research objects in pianguan, shanxi province, Loess Plateau Hilly and Gully Regions, soil physical and chemical properties and soil anti-erodibility evolvement in the process of stockbreeding development were studied in this project. Indexes including water stable aggregate content, aggregate condition, aggregate degree, disperse coefficient and disperse degree were selected to analyses and evaluate soil anti-erodibility for grazing forest land of C.korshinkii and grassland of A.adsurgens. The goal was to provide theoretic reference for farther understand environment effect of grazing and ascertain feasible grazing capacity. The results obtained were summarized as follows:...