The causes of soil alkalinization in the Songnen Plain of Northeast China

被引：199
|
作者：
Wang, Li [2 ,3 ]
Seki, Katsutoshi [1 ,3 ]
Miyazaki, T. [3 ]
Ishihama, Y. [3 ]
机构：
[1] Toyo Univ, Fac Business Adm, Bunkyo Ku, Tokyo 1128606, Japan
[2] NW A& F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Prov, Peoples R China
[3] Univ Tokyo, Grad Sch Agr & Life Sci, Dept Biol & Environm Engn, Bunkyo Ku, Tokyo 1138657, Japan
来源：
PADDY AND WATER ENVIRONMENT | 2009年 / 7卷 / 03期
关键词：
Songnen Plain; Soil alkalinization; Groundwater; Human activities; Overgrazing; GRASSLAND; BIOMASS; GIS;
D O I：
10.1007/s10333-009-0166-x
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The causes of soil alkalinization in the Songnen Plain of Northeast China were mainly analyzed from two aspects, natural and anthropogenic. Natural factors of alkalinization are parent materials, topographic positions, freeze-thaw action, wind conveyance, water properties and semi-arid/sub-humid climate. Some of them were always being neglected, such as freeze-thaw action and wind conveyance. Anthropogenic causes are mainly population pressure, overgrazing and improper agricultural and economic policies. In recent decades, overgrazing played a main role in secondary soil alkalinization, which led to the decline of Leymus chinensis grasslands. Now, the alkalinization is very severe, and more than 3.2 x 10(6) ha area has been affected by salt, which becomes one of the three largest sodic-saline areas in the world.
引用
收藏
页码：259 / 270
页数：12
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