浑善达克沙地植被恢复对土壤理化性质的影响

目的]研究浑善达克沙地植被恢复过程对其土壤理化性质的影响.方法]采用野外调查与室内分析相结合的方法,以内蒙古自治区克什克腾旗浑善达克沙地不同治理时间及不同恢复阶段沙地为对象,定量分析不同治理时间及不同恢复阶段沙地土壤的理化性质.结果]随治理时间的增加和沙地的不断恢复,0～5 cm土层含水量和土壤容重分别呈增加和降低趋势,5～60 cm土层土壤含水量和土壤容重则均呈现降低趋势.土壤有机质含量和全氮量逐渐增加.半固定沙地与固定沙地的土壤有机质含量较流动沙地提升2.03和6.12倍,全氮量提升48.15％和74.38％.结论]研究结果可为浑善达克沙地的生态治理提供理论依据.

Effects of Vegetation Restoration on Physical and Chemical Characteristics of the Soil in Hunshandake Sand

Objective] The research aimed to study the effects of vegetation restoration on the physical and chemical characteristics of soil in Hunshandake sand. Method ] Physical and chemical characteristics of the soil in different governance time and different succession stage of Hunshandake sand were studied through the method of field investigation and indoor analysis. Result ] The results showed that in 0 - 5 cm layer of soil, soil water content increased and soil bulk density decreased, in 5 -60 cm lay of soil, soil water content and soil bulk density decreased with governance time and restoration time. Soil organic matter content and total N content increased with governance time and restoration time. Soil organic matter content of the semi-fixed sand and fixed sand were 2.03 and 6.12 times of that in flow sand, total N content of the semi-fixed sand and fixed sand increased 48.15% and 74.38% than that of flow sand. Conclusion] This study could provide theoretical basis for the ecological treatment of Hunshandake sand.