干旱区生态环境知识资源中心(Arid): 沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征以宁夏盐池县为例

Arid

	沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征以宁夏盐池县为例
其他题名	Changes in the Distribution of Soil Particle and the Content of Soil Nutrients During Reversal of Desertification:a case study in Yanchi County, Ningxia Hui Autonomous Region
	陈小红; 段争虎; 谭明亮; 张瑞君
来源期刊	土壤通报
ISSN	0564-3945
出版年	2010
卷号	41 期号:6 页码:1412-1417
中文摘要	从时空转换的角度出发,通过野外采样和实验室分析,研究了宁夏盐池县多年围封区沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征,并利用统计分析法,分析了土壤粒级分布与养分含量的定量关系.结果表明:随沙化程度的减小,土壤粒级组成越来越细,其主要组成部分发生了变化;但从总量看,始终是砂粒含量最多,粉粒次之,粘粒最少,沙漠化再次恶化是有可能的.有机质,全氮,全磷,速效氮,速效磷和速效钾的含量随沙化程度的减小呈递增趋势,沙漠化逆转增加了土壤的固碳能力.通过相关分析可知,沙漠化逆转的本质是土壤细粒化伴随着土壤养分富集的过程.土壤细粒化是土壤各养分指标提高的直接原因,粘粉粒的增加对土壤养分的增加贡献较大,是土壤质量提高的主要因素,是沙漠化逆转的关键
英文摘要	Based on field investigation and laboratory analysis, the changes of the distribution of soil particle and the content of soil nutrients were examined by the method of time-space mutual substitution at a site exhibiting the reversal of desertification in enclosed area for many years of Yanchi County;and by adopting statistic analytical methods, the quantitative relationship between the soil particle distribution and the soil nutrient was discussed. The results showed that with the reduction of the degree of desertification, the content of coarse-fine sand decreased and the silt + clay increased, and the dominant soil particle class changed;the composition of soil particle was always that the content of sand was the first, silt in the second place, and the clay was the least, the deterioration of desertification was possible. The contents of soil organic matter, total N, total P, available N, available P, and available K showed the increasing tendency with the decrement of desertification;at the same time, the desertification reversion improved the ability of soil carbon sequestration. Correlation analysis indicated that the essential characteristic of desertification reversion was the process of the fineness of soil texture accompanying the enrichment of soil nutrients. The fineness of particle size distribution was the direct cause of the improve of soil nutrient contents, and the silt + clay content contributed most to the increasing soil nutrient contents, and thus appeared to be the main factor of the improved soil quality and the key factor of desertification reversal
中文关键词	沙漠化逆转 ; 颗粒分布 ; 土壤养分
英文关键词	Desertification reversal Distribution of soil particle Soil nutrients
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:4063501
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225734
作者单位	中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈小红,段争虎,谭明亮,等. 沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征以宁夏盐池县为例[J]. 中国科学院西北生态环境资源研究院,2010,41(6):1412-1417.
APA	陈小红,段争虎,谭明亮,&张瑞君.(2010).沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征以宁夏盐池县为例.土壤通报,41(6),1412-1417.
MLA	陈小红,et al."沙漠化逆转过程中土壤颗粒分布及其养分含量的变化特征以宁夏盐池县为例".土壤通报 41.6(2010):1412-1417.