干旱区生态环境知识资源中心(Arid): 草海上游石漠化过程中土壤抗蚀性变化

Arid

	草海上游石漠化过程中土壤抗蚀性变化
其他题名	Variation of Soil Anti-erodibility During Rocky Desertification in Upper Reaches of Caohai
	王向栋; 戴全厚; 李翠莲; 严友进
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2017
卷号	24 期号:3 页码:13-18,23
中文摘要	以草海流域上游的石漠化区为研究对象,研究不同等级石漠化条件下土壤抗蚀能力的差异,利用空间代替时间的方法,探讨草海上游区石漠化过程中土壤抗蚀性变化规律,为当地石漠化治理和湿地保护提供参考。通过实地调研,采集不同石漠化程度区的土样并进行室内指标测定,利用主成分分析方法选取了10个土壤理化指标对样地土壤抗蚀能力进行评价。结果表明:(1)所选10项理化指标可以较为全面地综合评价不同石漠化程度土壤抗蚀能力,土壤团聚状况、分散率、分散系数、>0.25mm水稳性团聚体含量、>0.5mm水稳性团聚体含量、结构破坏率、<0.05mm粉黏粒含量这7项可以作为评价的优选指标,有机质含量、<0.001mm黏粒含量、土壤团聚度这3项指标次之。(2)无石漠化CK样地(2.19)>轻度石漠化L样地(1.19)>重度石漠化S1样地(0.85)>中度石漠化M样地(-1.35)>重度石漠化S2样地(-2.88),其中中度石漠化样地(M)和重度石漠化样地(S2)为负值,其余均为正值,差异明显。在石漠化过程中土壤抗蚀能力总体呈下降趋势,但是在石漠化发展后期,土壤抗蚀能力反而会有上升的可能。
英文摘要	We analyzed the differences between soil anti-erodibility under different rocky desertification conditions in karst rocky desertification region in upper reaches of Caohai.By using space instead of time,changes of soil anti-erodibility were investigated during rocky desertification in upper reaches of Caohai,aiming to provide reference for desertification control and wetland protection of Caohai.Soil samples from different karst rocky desertification level areas were taken according to field investigation.Soil physicochemical properties were tested in laboratory,and ten of them were selected to evaluate the soil anti-erodibility by principal component analysis with Spass 18.0.The results indicated that:(1)soil anti-erodibility under different rocky desertification conditions could be comprehensive evaluated by 10indicators;the contents of silt/clay<0.05 mm,reunion situation,dispersion rate,dispersion coefficient,water-stable aggregates >0.25mm,water-stable aggregates>0.5mm,structural damage rate were optimal indexes to evaluate soil anti-erodibility,and the indices organic matter,content of clay<0.001mm,reunion degree came next;(2)the order of anti-soil erosion degrees of different rocky desertification areas obtained by principal component analysis was:sample CK of non rocky desertification(2.19)>sample L of light rocky desertification(1.19)>sample S1of intense rocky desertification(0.85)>sample M of moderate rocky desertification(-1.35)>sample S2of intense rocky desertification(-2.88),the values of comprehensive anti-erodibility indexes of Sample M and Sample S2 were negative,others were positive,the differences were obvious.Soil anti-erodibility declined gradually during rocky desertification,but it could also increase in late stage of rocky desertification.
中文关键词	土壤学 ; 土壤抗蚀性 ; 主成分分析 ; 石漠化 ; 草海
英文关键词	pedology soil anti-erodibility principal component analysis karst rocky desertification Caohai
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:6005712
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236700
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	王向栋,戴全厚,李翠莲,等. 草海上游石漠化过程中土壤抗蚀性变化[J],2017,24(3):13-18,23.
APA	王向栋,戴全厚,李翠莲,&严友进.(2017).草海上游石漠化过程中土壤抗蚀性变化.水土保持研究,24(3),13-18,23.
MLA	王向栋,et al."草海上游石漠化过程中土壤抗蚀性变化".水土保持研究 24.3(2017):13-18,23.