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农牧交错区退耕还林地土壤恢复特征的研究-以内蒙古卓资县为例
摘要： 以卓资县退耕还林地为研究对象,探讨不同退耕还林地土壤理化性质的变化规律及改良作用.初步研究结果表明:退耕还林以后土壤黏粒总体含量均高于耕地,其中表土层增加不显著,亚表层、下层增加较多;在不同的退耕还林地中,表层土壤容重明显高于亚表层和下层的土壤容重;不同退耕还林模式下土壤有机质含量均随土层深度增加而递减,表现出明显的表聚性;不同林地类型之间的全量N、P、K的含量变化差异显著,而不同土层深度的全量P、K的差异不显著;不同退耕林地的速效N、P、K的含量变化幅度较大.总体来看当地实施退耕还林后,对土壤的改良效果明显,有效的改善了当地生态环境. Abstract： This paper studies the soil of conversion cropland to forest in Zhuozi county, exploring the law of change in the nature of the soil physical and chemical properties and the role of improvement to soil in different farmland to forests. Preliminary findings show that the soil clay contents were generally higher than those of cultivated land after returning farmland to forest, of whieh no significant increase in surface soil,sub-surface, middle and lower classes increased considerably. Returning farmland to forest in different places, the surface soil bulk density was significantly higher than sub-surface and lower soil bulk density.Different modes returning farmland to forest soil organic matter levels were decreasing with the increase in soil depth and showing a clear table cohesion. The change of entire amount of N, P, K content was significantly between the different forest types, while the entire amount of P, K of soil of different depth was not significant. The rangeability of content to quick N, P, K in different returning farmland to forest land was relatively large. Overall, it was obvious effects of soil improvement, and effectively improve the local ecological environment after implementation of the returning farmland to forests in the local. 作 者： 王同顺 郭建英 孙保平 李锦荣 WANG Tong-shun GUO Jian-ying SUN Bao-ping LI Jin-rong 作者单位： 北京林业大学,水土保持学院,北京,100083 期 刊： 水土保持研究 ISTICPKU Journal： RESEARCH OF SOIL AND WATER CONSERVATION 年，卷(期)： 2009, 16(6) 分类号： X171.1 S153 关键词： 农牧交错区 退耕还林 土壤理化性质 卓资县 Keywords： farming-pastoral zone mandatory conversion of marginal farmland to forestland soil physical and chemical properties Zhuozi county【农牧交错区退耕还林地土壤恢复特征的研究-以内蒙古卓资县为例】相关文章：
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