Superabsorbent polymer has been attracted widespread attention and application,because of its higher water absorption,better water retention and salt-resistance.The water absorption and retention of PAA-AM in salt solution of different anion and cation strength,different pH values and different soil texture was investigated.The results show that PAA-AM has a big effect on salt solution of different anion and cation strength,the sequence of influence to ionic of different valence state was trivalence > bival...