Analysis of Application of Superabsorbent Polymer in Sandy Soils

Objective]The aim was to research water retention of superabsorbent polymer （SAP） in sandy soils. Method] With soils from an ancient course in the Yel ow River as materials, acrylate SAP was taken as water retention materials to conduct the test. Result] With 0.2%-0.4% SAP added, dewatering period of sandy soil extended after irrigation; the period of water retention quantity over 10% last for 42 d, which was significantly more than that of the control group in 16 d （saturated water reducing to 10%）; water retention effect proved better at the 2nd irrigation without soil stirring compared with the 1st irrigation. Conclusion] The mixture of SAP with sandy soils promotes water retention in soils.