EFFECT OF DIFFERENT GRAZING SYSTEMS ON SPATIAL HETEROGENEITY OF THE DOMINANT SPECIE Cleistogenes songorica IN DESERT STEPPE
The paper studied on spatial heterogeneity distribution of Cleistogenes songorica in enclosed area (CK),rotational grazing area (RG) and continuing grazing area (CG) using GS + software and methods of geostatistical analysis,which took the dominant specie Cleistogenes songorica as research object.The results showed that,density of Cleistogenes songorica showed RG ＜ CK ＜CG,variation coefficient of spatial distribution density was RG ＜ CG ＜ CK,the maximum spatial distribution variability was CK ＞ RG ＞ CG.The spatial variation of Cleistogenes songorica was mainly caused by structure factors under continuing grazing condition while in rotational grazing condition,it was the obvious factor of random factors,and the structure ratio was 0.679.The spatial distribution characteristics of Cleistogenes songorica showed a large patchy distribution,continuing grazing caused Cleistogenes songorica a mosaic distribution of lower and higher density plaque,which had a mesh spatial distribution state.
NETL
NSTL
万方数据
维普
