1, Water retention agent is not soluble in water, but can absorb water which is equivalent to 100 times of its own weight. The water protection agent can effectively inhibit the evaporation of water. After seeping in the soil, the moisture content of the soil has been reduced to a great extent, and the saturated water content of the soil has been improved, so that the water rate of the soil has been reduced, and the soil moisture has been reduced and lost, so as to achieve the purpose of water retention.

2, protect fat. Because of super absorbent polymers have the function of the absorption and water points, so the fertilizer can be soluble in water, pesticides and other nutrients needed for crop growth of fixed, to a certain extent, reduced the soluble nutrient leaching loss, reached the section water fat, improve the utilization ratio of water effect.

3, After the application of super absorbent polymers, can absorb moisture to keep the heat energy produced is part of the light during the day night temperature regulation, make soil decrease temperature gap between day and night. In the sandy loam mixed with 0.1% ~ 0.2% of water retention agent, to 10 cm soil temperature monitoring shows that there is a buffer effect on Mark Twain lift, reduce temperature difference between day and night from 11 to 13.5 ° C, and no water retention agent soil from 11 to 19.5 ℃.

4, improve soil structure. Water retention agent into the soil, as swell and desiccation shrinkage regularity of change, can make the soil around from tight to loose, porosity to, a to extent, improve soil appear.