High Absorbent Resin Water And Fertilizer On The Soil Properties And Soil Structure Research

Superabsorbent was a new functional macromolecule material developed at recently several years, and it had very strong abilities to absorb and retain water. So far, Superabsorbent was widely applied in industry, in agriculture, in architecture, in medical treatment and hygiene and other realm.It was researched that different dosage sodium polyacrylate effected on retraining water vaporization and retaining water capacity of southern hillside soil, southern flower soil, southern vegetable field soil, clay soil and Guangzhou lateritic red soil. It was also researched that water-holding agent influenced on the available soil water contents of Guangzhou lateritic red soil and temperature influenced on retaining water capacity of water-holding agent. Result indicating, use of water-holding agent could retrain water vaporization of soil and improve retain water capacity of soil, but it was affected greatly by temperature. Use of water-holding agent greatly increased the available soil water contents of Guangzhou lateritic red soil, too.Superabsorbent could greatly affect some important physical properties of soil. It was researched that water-holding agent affected water-stable aggregates of different soil, volume rate of expansion, massiness coefficient, penetrative coefficient and volume weight of Guangzhou lateritic red soil. It was proved that use of water-holding agent could largely increase the sum content of water-stable aggregates (>0.25mm), and could improve volume rate of expansion and penetrative coefficient, and could decrease volume weight of soil. Suitable dosage of water-holding agent could properly elevate massiness coefficient of soil, but excessive dosage could cause harden of soil. Use of water-holding agent could availably increase water content of soil and mend hole status. Accordingly, be beneficial to soil to exchange water, air, heat and fertilizer. Thus was beneficial to growth of plants and could decrease water and soil forfeit.The present paper studies influence of Superabsorbent on nitrogen, phosphor and potassium in soil, in order to confirm if water-holding agent could keep fertility- It was testified self of water-holding agent had good ability to absorb and release nitrogen,phosphor and potassium, but when it was used in soil, this function badly debase. But compared to self of soil, use of water-holding agent enhance the ability of soil to absorb, fix and release nitrogen and potassium, that is to say, water-holding agent can keep and delay fertility. Use of water-holding agent increased the ability to soil to release phosphor, and decreased the ability to soil to fix phosphor. Therefore, validity of phosphor got improvement, thus validity of fertility was enhanced from another point of view. Summarized, sodium polyacrylate was used as water-holding agent of soil that is beneficial to fertility of soil, but its performances have yet required improvement.