Effects of Super Water Absorbent on Soil Improvement
Su Wenqiang, Yang Lei, Yang Dongmei(Northeast Forestry University, Harbin 150040, P. R. China)
An experiment was conducted to study the changes of water retention properties of soil after water-retention agent with carboxymethyl cellulose and acrylic acid graft copolymerization was added in cropland soil. The results indicate that super water absorbent resin can raise water storage capacity and water retention ability of soil, effectively restrain soil water evaporation, and can make the soil keep more moisture for a relatively long time. With the content of super water absorbent resin increasing, the composing proportion of soil liquid phase increases, and the function of water storage strengthens. The super water absorbent has stimulative effect on the form of soil aggregation structure. After the super water absorbent is added in the soil, the moisture is absorbed by the resin, so the freedom water in the soil reduces, and the heat exchange effect of the soil reduces, the temperature difference between day and night for living environment of crops reduces, which are beneficial to the growth of crops.
【CateGory Index】： S156