Soil Degradation in Nenjiang Basin During Recent Twenty Years

WANG Ling-he; HU Dong-lai; YAN Deng-hua; WANG Gang

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Soil Degradation in Nenjiang Basin During Recent Twenty Years

- Soil Degradation in Nenjiang Basin During Recent Twenty Years
- Bulletin of Soiland Water Conservation Vol. 29, Issue 2, Pages: 70-74(2010)
- 作者机构：
  
  1. 大连理工大学土木水利学院,辽宁,大连,116023
  2. 中国水利水电科学研究院,北京,100038
  3. 东华大学环境科学与工程学院,上海,200051
- 作者简介：
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- DOI：
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- Published：2010
- 稿件说明：
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WANG Ling-he, HU Dong-lai, YAN Deng-hua, et al. Soil Degradation in Nenjiang Basin During Recent Twenty Years[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 70-74.
DOI：

WANG Ling-he, HU Dong-lai, YAN Deng-hua, et al. Soil Degradation in Nenjiang Basin During Recent Twenty Years[J]. Bulletin of Soiland Water Conservation, 2010, 29(2): 70-74. DOI：

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。

Abstract

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.

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