平茬对荒漠草原区人工柠条林地土壤理化性质的影响

平茬措施是提高柠条林地生产力的主要方式，研究平茬措施对人工柠条林地土壤性质的影响，对科学种植人工柠条林具有重要的理论与实践意义。本文以林龄为6a的人工柠条林地为研究对象，通过实验室测定其平茬前后土壤机械组成、水分、pH值、有机碳、全氮、碱解氮、有效磷、速效钾含量的变化，采用相关分析法分析了平茬前后土壤机械组成与土壤因子之间的相关性。结果表明：平茬措施对人工柠条林地土壤理化性质改变产生积极的影响，平茬后土壤pH值和容重下降，砂粒含量减少，粉、粘粒含量增加，0~5 cm土层有机碳和全氮的含量升高，0~40cm土层土壤水分含量增加，人工柠条林耗水量减少。

Effects of Prune Measure on Soil Properties of Artificial Caragana Intermedia Forest in Desert Steppe

Prune measure is the main way to improve forest productivity of Caragana intermedia. Researching the effects of pruning measure on soil properties of artificial Caragana intermedia forest has important theoretical and practical significance for scientific planting artificial Caragana intermedia in desert steppe. 6 years age artificial Caragana intermedia forest was taken as a study object. The soil mechanical composition,water content,pH,organic matter,total nitrogen,available nitrogen,available potassium and available phosphorus at the soil depth of zero to forty centimeters were measured and the relationship between soil mechanical composition and soil factors was analyzed using the correlation analysis method before and after the artificial Caragana intermedia brushes had been pruned. The results showed that the prune measure had a positive effect on improving the soil physical and chemical properties of artificial Caragana intermedia forest. After the bushes had been pruned,the soil pH and the soil bulk density had been descended,the soil silt grains and clay grains had been increased instead.At the same time, it had increased the water content of 0~40 cm soil layer.The water consumption of artificial Caragana intermedia forest had been decreased.