干旱区生态环境知识资源中心(Arid): 近20a来嫩江流域土壤退化的初步研究

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	近20a来嫩江流域土壤退化的初步研究
其他题名	Soil Degradation in Nenjiang Basin During Recent Twenty Years
	王凌河 1; 胡东来 2; 严登华 2; 王刚 2
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2010
卷号	30 期号:2 页码:70-74
中文摘要	结合全国第二次土壤普查的数据和野外试验,分析了嫩江流域近20a的土壤质量变化. 研究结果表明,经过近20a的演化,土壤的质地发生变化,土壤中粉粒成分占近50%,基本没有变化,砂粒和黏粒的百分比发生变化,砂粒减少了22.95%,黏粒增加了50.09%. 土壤质地主要以黏壤土和黏土为主,所占面积百分比分别为32.52%和66.51%. 流域内壤土所占比例下降了17.54%,黏壤土和黏土分别增长了9.34%和8.20%. 嫩江流域土壤中的有机质含量范围0.55%~12.26%,与普查数据比较呈下降趋势,下游开发地区的土壤中有机质含量下降趋势明显,上游有机质含量增加了27.14%,下游有机质含量减少了33.11%. 嫩江流域未开发地区的土壤总体上未呈现严重的沙化趋势,但是嫩江下游的土壤沙化程度较上游严重,有机质的变化在流域空间分布上表现出明显的不同
英文摘要	Based on the data of the second national soil survey and the field investigations, the change of soil granularity and soil organic matter in Nenjiang basin during recent twenty years was analyzed by the mathematical statistical method and with the aid of GIS technology. Result showed that soil texture had changed. The percentage of silt was nearly 50% and it had hardly any change during this period. However, the content of sand and clay were different from the survey result. Soil sand particle decreased by 22.95%, while clay particle increased by 50.09%.The soil texture was mainly clay loam and clay, with the area percentage being 32.52% and 66.51%, respectively. In Nenjiang basin, loam decreased by 17.45%, while clay loam and clay increased by 9.34% and 8.20%, respectively. Compared with the second national soil survey, soil organic matter showed a decreasing trend, in the range from 0.55% to 12.26%.The downward trend of soil organic matter in the lower Nenjiang basin was obviously reduced by 33.11%, but in the upper, soil organic matter increased by 27.14%.On the whole, the undeveloped soils in Nenjiang basin do not show serious desertification trend, but soil desertification in the lower region is more serious than in upper region. Soil organic matter has different results in different regions in Nenjiang basin
中文关键词	嫩江流域 ; 土壤质地 ; 有机质 ; 退化 ; 变化
英文关键词	Nenjiang soil texture organic matter degradation change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3955611
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225622
作者单位	1.大连理工大学土木水利学院, 大连, 辽宁 116023, 中国; 2.中国水利水电科学研究院, 北京 100038, 中国
推荐引用方式 GB/T 7714	王凌河,胡东来,严登华,等. 近20a来嫩江流域土壤退化的初步研究[J],2010,30(2):70-74.
APA	王凌河,胡东来,严登华,&王刚.(2010).近20a来嫩江流域土壤退化的初步研究.水土保持通报,30(2),70-74.
MLA	王凌河,et al."近20a来嫩江流域土壤退化的初步研究".水土保持通报 30.2(2010):70-74.