陕西省黄土高原区生态恢复对土壤属性的影响研究  

Effects of Soil Forming Factors on Soil Properties in Loess Plateau of Shaanxi Province

作　　者：董莉丽 DONG Lili(School of Resources,Environment,History and Culture,Xianyang Normal University,Xianyang 712000,Shaanxi,China)

机构地区：[1]咸阳师范学院资源环境与历史文化学院,陕西咸阳712000

出　　处：《咸阳师范学院学报》2021年第4期50-56,共7页Journal of Xianyang Normal University

基　　金：国家自然科学基金项目(41907053);陕西省教育厅科研计划项目(20JK0971);咸阳师范学院科研基金项目(XSYK19027)。

摘　　要：采集了陕西省黄土高原区6个样区不同成土因素下的34个表层土壤样品,利用Canoco4.5软件中的冗余分析(RDA)方法,分析了陕西省黄土高原区生态恢复过程中各成土因素对土壤有机质(SOM)、碳酸钙(CaCO_(3))和水稳性团聚体平均质量直径(MWD)的影响,并讨论了三个土壤属性之间的相互关系。研究结果表明:SOM和MWD在不同植被带和不同植被类型之间的变化顺序基本一致,表现为森林带>森林草原带;林地>荒地>农地。MWD和SOM之间呈正相关关系,而二者与CaCO_(3)呈负相关关系;MWD和SOM主要受植被带、植被类型和退耕年限的影响;CaCO_(3)主要受纬度的影响。生态恢复可显著提高土壤有机质含量和土壤结构水稳性,并有利于脱钙作用。植被类型、退耕年限、纬度和植被带对土壤属性的影响显著(P<0.01)。其中,植被类型为主导因素,可解释土壤属性变化的36.5%。34 topsoil samples with different soil forming factors were collected from 6 sample areas in Shaanxi Province.The effects of soil forming factors on soil organic matter(SOM),calcium carbonate(CaCO_(3))and mean mass diameter(MWD)of water stable aggregates were analyzed using redundancy analysis(RDA)method in canoco4.5 software.The relationships among the three soil properties were also discussed.The results show:The order of SOM and MWD in different vegetation zones and types was the same(forest belt>forest steppe zone and woodland>wasteland>agricultural land).MWD and SOM were positively correlated,while they were negatively correlated with CaCO_(3).MWD and SOM were mainly affected by vegetation belt,vegetation type and years since cultivated land was abandoned;while CaCO_(3)was mainly afftected by latitude.Ecological restoration can significantly improve soil organic matter content and water stability of soil structure,and be conducive to decalcification.Vegetation type,years of land abandonment,latitude and vegetation belt had significant effects on soil properties(P<0.01).Vegetation type was the dominant factor,accounting for 36.5%of the changes in soil properties.

关 键 词：土壤属性 黄土高原 成土因素 生态恢复 

分 类 号：X171.4[环境科学与工程—环境科学]