PAM对潮土水稳性团聚体的影响  

Effect of PAM on Soil Water Stable Aggregates in Alluvial Soil

作　　者：王永敏[1] 李俊颖[1] 王定勇[1,2] 

机构地区：[1]西南大学三峡库区生态环境教育部重点实验室西南大学资源环境学院,重庆400715 [2]重庆市农业资源与环境研究重点实验室,重庆400716

出　　处：《中国农学通报》2010年第6期297-299,共3页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划课题(2007BAD39B02);西南大学生态学重点学科"211"建设项目

摘　　要：通过室内土柱培养,研究4种不同浓度聚丙烯酰胺(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%。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 〉0.25 mm water stable aggregates effectively, and the effects were enhanced as the concentration of PAM increased. The best effect was found at the lg/kg concentration, compared with the blank control, the 〉0.25 mm water stable aggregates increased 42.69%, while its fractal dimension decreased 10.11%.

关 键 词：聚丙烯酰胺(PAM) 水稳性团聚体 分形维数 

分 类 号：S156.2[农业科学—土壤学]