PAM-atta复合保水剂对土壤物理性质的影响

Effects of Water-Preserving Composite of Polyacylamide/Attapulgite on Soil Physical Properties

在研制开发出耐盐型丙烯酰胺／凹凸棒黏土复合保水剂（PAM-atta）的基础上，研究了该复合保水剂对土壤物理性质的影响。结果表明：PAM—atta复合保水剂可显著提高土壤含水量、〉0．25mm团聚体含量、孔隙度以及阳离子交换量，降低土壤体积质量（容重）。同时PAM-atta复合保水剂粒径越小，对土壤体积质量、团聚体等的作用效果也越明显。与CK相比，施用120目的保水剂可提高土壤中〉0．25mm团聚体含量达13.3％-16．2％。

A new water-preserving composite of polyacylamide/attapulgite （PAM-atta） was prepared by combining acylamide with attapulgite clay. Effects of PAM-atta on soil physical properties were investigated. The results indicated that soil water content, pH value, aggregates 〉0.25mm, porosity and cation exchange capacity increased with application rate of the composite. The finer the composite in particle size, the more significant the effect on soil water content and aggregates 〉0.25mm. Th.e use of the composite that has passed a 120 mesh sieve may increase the content of soil aggregates 〉0.25mm uo to 13.3% - 16.2%.