干旱区生态环境知识资源中心(Arid): 喀斯特土壤抗蚀性对不同土地利用方式的响应

Arid

	喀斯特土壤抗蚀性对不同土地利用方式的响应
其他题名	Responses of Karst soil anti-erodibility to different land use types
	李会; 周运超; 刘娟; 李玲
来源期刊	中国水土保持科学
ISSN	1672-3007
出版年	2015
卷号	13 期号:5 页码:16-23
中文摘要	为了解喀斯特地区不同土地利用方式土壤的抗蚀性能,探讨喀斯特地区能否沿用黄土高原土壤抗蚀性研究的方法,在普定陈旗小流域内测定6种喀斯特地区典型土地利用方式土壤的抗蚀性指标,并进行主成分分析。结果表明:衡量普定陈旗小流域土壤抗蚀性的3个最佳指标是有机质质量分数、>0.5mm水稳性团聚体质量分数和抗蚀性指数;不同土地利用方式土壤的抗蚀性大小顺序为,灌草地>稀疏灌丛地>火烧迹地>复合植被>幼林地>坡耕地。说明土地利用方式和强度的改变,使地表植被和土壤理化性质发生变化,进而影响土壤的抗蚀性指标,导致土壤抗蚀性相应变化。积极的人为活动益于增强土壤抗蚀性,破坏地表植被和土壤结构的人为活动降低土壤抗蚀性。结合全坡面大径流场水土流失监测结果发现,土壤抗蚀性大小顺序与水土流失监测结果不一致,同时喀斯特地区土壤抗蚀性研究存在大量矛盾,说明喀斯特地区土壤抗蚀性研究直接套用黄土高原土壤抗蚀性研究的方法值得商榷。
英文摘要	The objectives of this study were to understand the responses of soil anti-erodibility to the ways of land use in Karst region and to explore whether soil anti-erodibiliy methods used in loess plateau could be applied in Karst area. Six typical land use types in Karst region, i.e., shrub-grass land, grazing shrub land, burned land, mixed vegetation, young forest, and sloping farmland in Chenqi catchment of Puding County, Guizhou Province, were used to test soil anti-erodibility indexes such as soil organic matter, soil bulk density, soil texture, micro-aggregate, aggregation degree, dispersion rate, dispersion coefficient, construction/destruction rate, and water stable aggregate, and major influencing factors were analyzed. The three major indexes affecting soil anti-erodibility were content of soil organic matters, water stable aggregate (bigger than 0.5mm) and anti-erodible index. Soil erodibility was in the order of shrub-grass land (2.00) > grazing shrub land (1.75) > burned land (0.71) > mixed vegetation (0.14)> young forest (-1.62) > sloping farmland (-2.99). Soil anti-erodibility changed with the ways and intensity of karst land use which affected plant cover and soil physical and chemical characteristics. Soil anti-erodibility was enhanced by positive human activities; however it was weakened if plant cover and soil structure were destroyed. Compared with the monitoring results from the entire slope of the large-scale runoff site in Chenqi catchment, the order of soil anti-erodibility differed from that of soil erosion, and a lot of contradictory results existed among the studies of Karst region. The contradictions include: 1) the chosen indexes were different among different researches; 2) some indexes repeatedly affected soil anti-erodibility; 3) some indexes affected soil anti-erodibility positively and also negatively; 4) many results in the soil anti-erodibility studies were inconsistent with our own experiences; 5) soil anti-erodibility was affected greatly by the characteristics of Karst thin soil, rocky desertification and gravels. Most of the indexes except for soil bulk density did not include the information of gravels. In this way, it is unreliable to simply copy soil anti-erodibility methods from loess plateau into the study of karst soil erodbility.
中文关键词	喀斯特 ; 土壤抗蚀性 ; 土地利用方式 ; 主成分分析
英文关键词	Karst soil anti-erodibility land use type principal component analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5555560
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233817
作者单位	贵州大学林学院, 贵阳, 贵州 550025, 中国
推荐引用方式 GB/T 7714	李会,周运超,刘娟,等. 喀斯特土壤抗蚀性对不同土地利用方式的响应[J],2015,13(5):16-23.
APA	李会,周运超,刘娟,&李玲.(2015).喀斯特土壤抗蚀性对不同土地利用方式的响应.中国水土保持科学,13(5),16-23.
MLA	李会,et al."喀斯特土壤抗蚀性对不同土地利用方式的响应".中国水土保持科学 13.5(2015):16-23.