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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (6): 297-299.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

PAM对潮土水稳性团聚体的影响

王永敏1,李俊颖1,王定勇1,2   

  • 收稿日期:2009-11-06 修回日期:2009-11-26 出版日期:2010-03-20 发布日期:2010-03-20
  • 基金资助:

    国家科技支撑计划课题

Effect of PAM on Soil Water Stable Aggregates in Alluvial Soil

  • Received:2009-11-06 Revised:2009-11-26 Online:2010-03-20 Published:2010-03-20

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摘要：

通过室内土柱培养，研究四种不同浓度PAM对潮土水稳性团聚体的改良效果。结果表明，加入不同浓度PAM均可促使>0.25mm水稳性团聚体的形成,并有效降低团聚体分形维数，改善土壤结构。随着PAM浓度的增加，改良效果逐渐增强。在加入浓度为1g/kg时达到最好的效果，较对照，>0.25mm水稳性团聚体增加了42.69%，分形维数降低了10.11%。关键词：聚丙烯酰胺（PAM）；水稳性团聚体；分形维数

关键词: 百合种球, 百合种球, 抗寒性, 电导率, 半致死温度, 束缚水/自由水, 脯氨酸

Abstract:

PAM was applied in soil column to study the effects of PAM on water stable aggregates of the alluvial soil. The results showed that PAM improved the structure of the studied soils by promoting the formation and reducing the fractal dimension of the >0.25mm water stable aggregates effectively, and the effects were enhanced as the concentration of PAM increased. The best effect was found at the 1g/kg concentration, compared with the blank control, the >0.25mm water stable aggregates increased 42.69%, while its fractal dimension decreased 10.11%.