黄土丘陵沟壑区植被恢复过程中的土壤抗蚀与细沟侵蚀演变  

Soil Anti-Erodibility and Soil Erosion Evolution of During Process of Vegetation Recovering in Loess Hilly-Gully Region

作　　者：韩鲁艳[1,2] 贾燕锋[1,2] 王宁[1] 焦菊英[1] 

机构地区：[1]西北农林科技大学,中国科学院水利部水土保持研究所,陕西杨陵712100 [2]中国科学院研究生院,北京100049

出　　处：《土壤》2009年第3期483-489,共7页Soils

基　　金：国家自然科学基金项目(40571094,40771126);西北农林科技大学创新团队建设计划项目(01140202)资助

摘　　要：对黄土丘陵沟壑区安塞纸坊沟和县南沟、延安燕沟3个流域不同恢复年限的植物群落的土壤抗蚀性和侵蚀程度进行了研究。对12个土壤抗蚀性指标进行主成分分析表明,土壤抗蚀性(主成分综合指数)强弱为灌木群落阶段>多年生草本和蒿类群落阶段>一二年生草本群落阶段,与一二年生草本群落阶段相比,灌木群落阶段与多年生草本和蒿类群落阶段的土壤抗蚀性分别增加了362.29%～673.33%和574.71%～930.00%;野外调查结果分析表明,随着植被的恢复演替,土壤侵蚀量呈现明显的下降趋势,灌木群落阶段的土壤侵蚀量仅为演替初期的1.42%～5.59%;通过回归分析,土壤侵蚀量和水稳性团聚类因子,以及有机质含量之间分别存在极显著与显著相关关系,鉴于土壤分析的易获性,可选择>0.5mm水稳性团聚体与有机质含量作为反映土壤侵蚀程度的指标。This study was aimed to explore the interaction between the development of vegetation succession and the soil anti-erodibility in hilly-guUy regions based on the investigation carried out under different vegetation types in three watersheds of Loess Plateau. Principal component analysis （PCA） was used to study the soil anti-erodibility, PCA comprehensive exponent of anti-erodibility indexes showed an order of anti-erodibility as shrub community 〉 perennial herb and artemisia community 〉 annual and biennial herbs community, compared with annual and biennial herbs community, the anti-erodibility of shrub community and perennial herb and artemisia community increased 362.29% - 673.33% and 574.71% 930.00% respectively; Field investigation showed soil erosive amount decreased with vegetation succession, and the amount of soil erosion in shrub community plots was only 1.42% - 5.59% of early succession plots; Regression analyses indicated that both water stable aggregates and organic matter were closely correlated to soil erosive amount. The organic matter content and 〉0.5 mm water-stable aggregates could be selected as inde

关 键 词：植被恢复 土壤抗蚀性 土壤侵蚀 主成分分析 黄土丘陵沟壑区 

分 类 号：S152.3[农业科学—土壤学] S157.5[农业科学—农业基础科学]