【摘要】 研究了 3种放牧强度对沙丘和低地利用单元土壤性质的影响。结果表明 :随着放牧强度的增强 ,低地和沙丘利用单元 ,粘粒含量下降 ,砂粒含量增加 ,土壤颗粒变粗 ,容重变大 ,总孔隙度下降 ;低地利用单元土壤变紧 ,0～ 5cm及 5～ 1 0cm土层含水量下降 ;阳坡和阴坡紧实度下降 ,0～ 5cm土层含水量下降 ,5～ 1 0cm含水量增加更多还原

【Abstract】 Three different grazing intensities effects on the soil properties of range sites in sand dune and low ground were studied in this paper. The results showed that: to the shade and sunlight sides of sand dune site, soil volume weight and soil particle increased with the increment of grazing intensity from light, moderate and heavy to overgrazing, the soil water content in soil surface 0-5cm declined, and increased in 5 cms below; in the low ground site, similar trends were oberserved.更多还原