分析了不同退耕年限群落类型土壤理化性质的变化规律。结果表明,退耕还林对土壤各种理化性状影响较大,土壤总孔隙度、毛管孔隙度、最大持水量、毛管持水量和土壤有机质、全氮、速效钾、CEC含量均表现为天然林地>退耕地>耕地,尤以表层表现明显,且随着退耕时间的延长,土壤理化性质得到明显改善。
Change rule of soil physical and chemical properties after“Conversion of Farmland to Forest” in alpine areas is analysed in this paper. The result shows that various physical and chemical property of soil is influenced clearly by “Conversion of Farmland to Forest”, and the natural woodland is better than converted farmland and farmland for total soil porosities, capillary porosities, maximum water holding capacity, capillary moisture capacity and soil organic matter,total nitrogen,readily available potassium,CEC content,especialy in the top layer of soil,and soil chemical and physical properties are improved obviously with the time length of the converted land.
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