PAM对潮土水稳性团聚体的影响

Effect of PAM on Soil Water Stable Aggregates in Alluvial Soil

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%.