摘要
紫色土是一种容易产生水力侵蚀的土壤类型,了解不同土地利用对紫色土抗蚀性的影响,可为贵州高原水土流失提供理论依据。基于习水县紫色土区7种典型土地利用类型土壤抗蚀性指标测定,通过主成分分析,综合评价了不同土地利用类型紫色土的抗蚀性。结果表明,水稳性团聚类、团聚体类和有机胶体类因子等3个主成分因子能够全面反映土壤抗蚀性能力,不同土地利用类型土壤抗蚀性综合指数大小排序为针叶林>疏幼林>梯坪地>阔叶林>坡耕地>水田>荒山。人类干扰会影响紫色土土壤抗蚀性与不同土地利用类型之间的关系。
Control of soil erosion in the region where purple soils are distributed in Yun-Gui plateau have attracted much attention of many ecologists in recent years, due to high soil erosion rate of the soil types. To understand the relationships hetween different land uses and soil anti-erodibility, seven land use types were selected as materials in purple soil hilly region in Xishui county of Guizhou and indexes describing soil anti-erodibility were tested. Principal component analysis showed that there were three principal component factors which affected soil anti-erodibility, which were water stability class reunion, aggregate class and organic colloid class. The composite index of soil anti-erodibility of different land use types indicated such an order： sloping farmland〉eonit）rous forests〉sparse young forest〉 ladder flat land〉broad-leaved forest〉paddy field〉barren hills. To some degree, human disturbance caused a variance in the relationships between soil anti-erosbility and land use types.
出处
《广东农业科学》
CAS
CSCD
北大核心
2012年第24期62-64,共3页
Guangdong Agricultural Sciences
基金
国家自然科学基金(40861015)
关键词
土壤抗蚀性
主成分分析
不同土地利用类型
erosion anti-erodibility of soil
principal component analysis
different land utilization types
