摘要
以半干旱的辽西地区广布的油松针叶纯林、油松针阔混交林和阔叶林林下的土壤为研究对象 ,通过主分量分析方法将 9个抗蚀性指标分为 3类 :无机胶粒团聚类因子、有机胶粒团聚类因子和抗分散类因子 ,并以抗蚀性指数 ,来评价辽西地区土壤的抗蚀性 ,以期为辽西地区水土保持效益评价和造林树种选择提供依据。结果表明 ,土壤抗蚀性上坡小于下坡 ,阳坡半阳坡小于阴坡半阴坡 ;坡度越大土壤抗蚀性越差 ;阔叶林林下的土壤抗蚀性大于针阔混交林 ,大于针叶纯林。
Sampling the soil under Pinus tabulaeformis conifer ous forest, P. tabulaeformis and broadleaveved mixed forest, and broadleaf forest distributed in semi-arid western Liaoning, with principal components analysis(PCA), this article divided 9 soil anti-erodibility indexes into 3 classes inorganic colloid factor,organic colloid factor, and anti-dispersing factor. Results reveal the soil anti-erodibility value of up slope was lower than down slope; dry slope was lower than mesic slope; broadleaved forest was higher than mixed forest and conifer forest, and with the increase of slope gradient the value of soil anti-erositility decreased.
出处
《生态学杂志》
CAS
CSCD
北大核心
2003年第5期10-14,共5页
Chinese Journal of Ecology
基金
国家重点基础发展计划项目 (G19990 43 40 7)
国家科技攻关项目(2 0 0 2BA5 16A2 0 )
国家自然科学基金 (NSFC3 0 170 744 )资助
关键词
辽西地区
林地
土壤抗蚀性
western Liaoning, forest field, soil anti-erodibility.
