Drought is one of the most common meteorological disasters and an urgent problem to be solved when planting flowers and plants in arid areas. The use of water retaining agents plays an important role.
Water retaining agent, also known as soil water retaining agent, water absorbing agent, humidifier, water absorbing resin, polymer water absorbing agent, is a polymer made of durable water absorbing resin. It can quickly absorb deionized water hundreds or even thousands of times heavier than its own weight. The salinity of water is tens or hundreds of times, and it has the function of repeatedly absorbing water and swelling into hydrogel after absorbing water. It can slowly release water for plants to absorb and use, thus improving soil water retention, improving soil structure, reducing deep leakage and nutrient loss in the soil, and improving water use. This is an effective means of regulating the water, heat, and gas states of soil, improving soil structure, and enhancing its fertility. Due to the cross-linking of molecular structure, the water absorbed by the molecular network cannot be squeezed out by simple physical methods, therefore it has strong water holding capacity. It is similar to a miniature storage facility for plant seeds and roots, with slow absorption. It can repeatedly release and absorb water, retain water and insecticides, root powder, fertilizers, etc. It can also slow down their release, improve usage efficiency, is non-toxic and corrosive, and is useful and harmless for plant and soil degradation.

The function of water retaining agent
1. It is isolation. The absorbed water can be used to maintain some of the heat generated during the day, regulate nighttime temperatures, and reduce the temperature difference between day and night in the soil. If 0.1% -0.2% water retaining agent is mixed in a 10 centimeter thick sandy soil layer, the temperature difference between day and night is only 11-13 ° C. The soil temperature without moisturizer is between 11 and 19.5 ° C.
2. Save fertilizer. Water retaining agents can fix essential nutrients for plant growth, such as water-soluble fertilizers and insecticides, which can reduce the loss of soluble nutrients during leaching to a certain extent and improve water and fertilizer utilization efficiency.
3. Improve the structure of the soil. When water retaining agents are applied to the soil, the surrounding soil can change from dense to loose with changes in the laws of water absorption expansion and contraction, and the porosity increases, which to some extent improves the permeability of the soil.
4. Promote the growth and development of plants. Grass flower seeds treated with water retaining agents can promote growth and development. Compared with untreated grass flowers, grass flowers treated with water retaining agents showed an increase in the number of roots, buds, stem thickness, and plant height.