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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (23): 255-258.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

硫酸铝改良苏打盐碱土后各离子的变化

孙宇男   

  • 收稿日期:2011-01-31 修回日期:2011-03-14 出版日期:2011-09-15 发布日期:2011-09-15
  • 基金资助:

    公益性行业（农业）科研专项经费项目（200903001—06）资助

The Change of Adding Aluminum Sulfate on Saline Alkali Soil’s Ion

  • Received:2011-01-31 Revised:2011-03-14 Online:2011-09-15 Published:2011-09-15

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摘要：

为了更好地利用苏打盐碱土，对其进行更好的开发和改良。笔者通过室内模拟，分析施用不同含量硫酸铝对土壤中可溶性盐及pH的影响。结果表明，添加硫酸铝后，使土壤溶液中钠离子、碳酸根和碳酸氢根明显增加，土壤溶液pH值明显下降，土壤性质明显改善。随着硫酸铝的增加，土壤颗粒释放出的可溶性盐也大量增加，明显减少土壤中的盐类物质。在加入不同浓度硫酸铝和不同淋洗次数的比较后，淋洗次数对苏打盐碱土中的盐类也有明显的影响，综合多项指标，加入硫酸铝浓度为0.8%时，淋洗2次，效果最佳。同时，苏打盐碱土理化性质的改良也为作物生长创造了良好的土壤环境。

关键词: 边际效应, 边际效应

Abstract:

In order to make better use of saline alkali soil, it should have better improvement. In this paper, effect of different concentrations of aluminum sulfate on soluble salts and pH value of the soil was studied through indoor simulation experiments. The results indicated that after a table 1 aluminum sulfate, Na+, CO32- and HCO3- contents of the soil solutions increased significantly, pH value of the soil solutions decreased significantly and properties of the soil had remarkable improvement. With the aluminum sulfate amount increasing, the soluble salt contents released from the soil particles increased, the salt contents in the soil reduced. Different density and washed times of aluminum sulfate influenced the outcome. At the same time, the improvement of physics –chemical properties of soda alkali-saline soils had created the good soil environment for the crops growth.