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《Grassland and Turf》 2008-04
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Fractal characteristics of soil particles of degraded desert grassland in Northern Xinjiang

FAN Yan-min1,2,ZHU Jin-zhong1,2,WU Hong-qi1(1.College of Grassland and Environment Science,Xinjiang Agricultural University;2.Xinjiang Laboratory of Grassland Resource and Ecology 830052)  
Fractal characteristics of degraded desert grassland in Northern Xinjiang were studied based on the soil particle size distribution.The results showed that the soil clay particle content increased,and the fractal dimension of soil particles in surface layer augmented along with desert grassland degraded.In topsoil,there was a very significant negative correlation between fractal dimension and the soil silt particle content;fractal dimension had a significant correlation with content of clay particles;no significant correlations were observed between the fractal dimension and the soil physical properties.As a result of influence of grazing,there is no correlation between chemical properties and fractal characteristics in topsoil.In lower soil,there was a significant correlation between fractal dimension and soil chemical properties including the contents of total phosphorus,pH,total kalium and available kalium.Obviously,fractal dimension could commendably reflected the transformation trend of the soil physicochemical properties,so it can be used as a comprehensively quantitative index to evaluate the soil properties of degraded desert grassland.
【Fund】: 新疆维吾尔自治区草地资源与生态重点实验室开放课题(XJDX0209-2004-03)资助
【CateGory Index】: S812.2
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