摘要
[目的]探讨人工恢复植被对沙地土壤特性的影响。[方法]选取毛乌素沙地南缘生长年限相同的5种代表性人工恢复植被(油蒿、沙柳、花棒、小叶杨和紫穗槐)样地为研究对象,以裸露沙地为对照,研究不同人工恢复植被样地的土壤理化性质。[结果]人工恢复植被能够改善沙地土壤理化特性,不同植被对土壤的作用强度不同;紫穗槐和花棒样地的土壤容重等物理性质改善明显;人工恢复植被样地的土壤粒度频率分布均呈现双峰,紫穗槐样地土壤平均粒径最小,分选性最差;人工恢复植被对沙地土壤养分改良效果不明显。[结论]人工恢复植被对沙地土壤特性具有一定的影响,沙地土壤物理性质改良效果显著,而沙地土壤化学性质改良效果不显著。
[ Objective ] This study aimed to investigate the artificial vegetation restoration on soil physicochemical properties in sandy land. [ Method] The soil physicochemical properties in five representative lands respectively covered by Artemisia ordosica, Salix cheilophila, Hedysarum scoparium, Populus simonii and Amorpha fruticosa, all of which were planted artificially at the same year were measured in the present study, using a bare soil as the control. [ Result] Artificial vegetation improved the soil physicochemical properties by different extents in the lands covered by different plants. The soil physicochemical properties such as bulk density under A. Fruticosa and 1t. Scoparium were improved greatly. The soil particle size distribution under artificial vegetation exhibited a bimodal curve. The average soil particle size under A. fruticosa was the smallest, and the soil was very poorly sorted. The soil nutrients in the sandy land were not significantly improved by artifi- cial vegetation. [ Conclusion] Artificial vegetation slightly changes the soil physicochemical properties in sandy land, the improvement effect of physical property of sandy land is significant, while the improvement of chemical property is not obvious .
出处
《安徽农业科学》
CAS
2013年第34期13217-13220,共4页
Journal of Anhui Agricultural Sciences
基金
国家"十二五"科技支撑计划(2012BAD16B0202)
国家林业公益性行业科研专项(201004018)
关键词
人工植被恢复
土壤理化性质
毛乌素沙地
Artificial vegetation restoration
Soil physicochemical properties
Mu Us sandy land
