Effects of super absorbent polymers on moisture application of Tall Fescue under water stress

In order to study the effects of different types and application concentrations of super absorbent polymers on soil water content, the growth characteristics of Tall Fescue and water use efficiency（WUE）, potted plant experiments with water retention tests were conducted. The results showed that there were significantly differences in the effects of different types and application concentrations of super absorbent polymers on soil water retention, the decline rates of soil water content in the treatments with 90 g/m2 of BASF, 30 g/m2 of AQUASORB and 290 g/m2 of YANLV were smaller than those of others in one day; the treatments with 580 g/m2 of BASF and YANLV, 90 g/m2 of AQUASORB maintained higher leaf water potential and lower decline rate of water potential; The water amounts of evaporation and transpiration in the treatments with 90 g/m2 of BASF, 60 g/m2 of AQUASORB, 870 g/m2 of YANLV were lower than the control, which saved water by 24.3， 17.61，17.32 g/d, respectively; The average growth rate of plant treated with YANLV was the highest in three super absorbent polymers, about 2.71 mm/d. The cutting litter and WUE of Tall Fescue treated with BASF and AQUASORB were both higher than the control, but the values treated with 580 and 870 g/m2 of YANLV were lower than the control.