黄土高塬沟壑区陡坡地典型植被不同恢复年限土壤物理性质比较研究——以陕西长武王东沟为例  

A Comparative Study on Soil Physical Properties of Steep Slopes in the Gully Region of the Loess Plateau with Different Restoration Years of Typical Vegetation——A Case Study of Wangdonggou in Changwu,Shannxi Province

作　　者：朱谧远 岩晓莹 郭天崎 黄明斌 ZHU Mi-yuan;YAN Xiao-ying;GUO Tian-qi;HUANG Ming-bin(College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China;State key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation Research,Northwest A&F University,Yangling,Shaanxi 712100,China)

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100

出　　处：《矿物岩石地球化学通报》2022年第5期1033-1040,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国科学院战略性先导专项(B类)课题(XDB40000000);中国科学院战略性先导科技专项课题(XDB20020202)。

摘　　要：为了解黄土丘陵沟壑区陡坡地植被恢复对土壤物理性质的影响,以黄土高原王东沟小流域为研究区域,对比分析草地、灌木、乔木纯林、乔灌混交林和乔木混交林在不同恢复年限时0~40cm土层土壤性质的变化特征。结果表明,植被恢复18年后,相比灌木、乔木纯林,混交林的植被生长状况更好;各样地的土壤有机质含量提高了7.3%~97.9%,其中油松*刺槐、刺槐*沙棘两个混交林效果最显著,分别提高了97.9%和89.4%。相比2014年,2021年时油松、油松*刺槐样地0~40cm土层的土壤容重分别降低了7.5%、13.4%,总孔隙度分别增加了6.4%和13.1%;油松、油松*刺槐、油松*沙棘样地0~40cm土层土壤持水性改善效果最佳,分别提升了7.7%、2.2%、5.3%;油松*刺槐样地0~40cm的土壤饱和导水率提高效果最好,增幅达146.8%。因此研究建议该区的植被恢复应以混交林为主。In order to understand the effect of vegetation restoration on soil physical properties on steep slope of hilly and gully regions of the Loess Plateau,the physical properties of surface soil(0-40cm)on steep slopes restored with grassland,shrub,pure arbor or mixed forest in different years in the Wangdonggou watershed were analyzed and compared.The results showed that after 18 years of vegetation restoration,the vegetation growth of mixed forests was better than that of pure forests of shrubs or arbors;the organic matter content of the surface soil increased by 7.3%-97.9%in all sample plots,two mixed forests,Pinus tabuliformis and Robinia pseudoacacia,and R.pseudoacacia and Hippophae rhamnoides,had the most significant effect on the increase of soil organic matter content,increasing by 97.9%and 89.4%,respectively.Compared with 2014,in 2021,the surface soil bulk density of the P.tabuliformis plot and the P.tabuliformis and R.pseudoacacia plot decreased by 7.5%and 13.4%,respectively,and the surface soil total porosity increased by 6.4%and 13.1%,respectively;P.tabuliformis,P.tabuliformis and R.pseudoacacia,P.tabuliformis and H.rhamnoides plots had the greatest improvement in soil saturated water retention,increasing by 7.7%,2.2%and 5.3%,respectively;the P.tabuliformis and R.pseudoacacia plot had the greatest improvement in soil saturated hydraulic conductivity,increasing by 146.8%.It is suggested that mixed forest as the main type of vegetation restoration in this area.

关 键 词：陡坡地 植被类型 恢复年限 土壤物理性质 土壤有机质 

分 类 号：S152[农业科学—土壤学]