高吸水树脂在土壤改良中的效应

羧甲基纤维素接枝丙烯酸保水剂施入农田耕土后土壤持水性质变化的实验结果表明：高吸水树脂提高了土壤蓄水容量和持水能力，能有效抑制土壤蒸发，可在较长时间内使土壤维持较多的水分。随着高吸水树脂含量的增加，土壤液相组成比例增加，蓄水功能增强。高吸水树脂还对土壤团粒结构的形成有明显的促进作用。土壤中加入高吸水树脂后，水分被树脂吸收，土壤中的自由水减少，土壤的热传导效应降低，降低了作物生活环境的昼夜温差，对作物的生长有利。

Effects of Super Water Absorbent on Soil Improvement

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.