The water-retaining agent is insoluble in water, but can absorb hundreds of times its own weight. The water-retaining agent can effectively inhibit the evaporation of water. After the water-retaining agent is infiltrated into the soil, it inhibits the evaporation of water to a large extent, increases the saturated water content of the soil. It can increase the saturated hydraulic conductivity of the soil, thereby slowing down the rate of soil water release, reducing the infiltration and loss of soil water, and achieving the purpose of water retention. It can also stimulate the growth and development of the root system of crops, increasing the length and number of roots. Maintains good growth in dry conditions.

Because the water-retaining agent has the function of absorbing and retaining water, it can fix the nutrients needed for the growth of crops such as fertilizers and pesticides dissolved in water, which reduces the leaching loss of soluble nutrients to a certain extent and saves water. Save fertilizer, improve the effect of water and fertilizer utilization.

The water-retaining agent has good thermal insulation performance. After the water-retaining agent is applied, the absorbed water can be used to maintain part of the heat generated by the sunlight during the day to adjust the temperature at night.

When the water-retaining agent is applied to the soil, with the regular changes of water absorption expansion and water loss shrinkage, the surrounding soil can be changed from compact to loose, and the pores increase, thereby improving the permeability of the soil to a certain extent.