| In order to underst and the basic property of different kinds of super absorbent polymers (SAP) in market presently so that to provide reference for the practice application, water absorbent capacity ，water absorption rate, water retention capacity and times of re absorbency of 10 kinds of SAPs from domestic and overseas, and water absorbing prop-erties in fertilizer solution of two kinds of them were tested. The results indicated that all kinds of SAPs have high water absorption capacity in distilled water, while the water absorption rate of BY，S1, S2, S3 and JF is faster than that of others . Under 35 C heated evaporation condition, the water retention capacity of H，BY, WT, FB and S2 is better than that of others. After 6 times of recurent absorbency duying，the water absorbent of WT， FB，S2 and JD still reaches
63.4%, 75.7%，51.5% and 66.6% of their original water absorption capacity，respectively. Three kinds of fertilizer solution in the experiment all have a sigmificant impact on SAP water absorbing properties, and the influence on poly-acrylic-inorganic mineral polymer is stronger than polyacrylamide-inorganic mineral polymer， and the influence of NKP compound fertilizer is stronger than that of organic fertilizer. |