中文摘要：

通过对保水剂在磷肥、钾肥溶液中的吸水倍率和对肥料养分吸持量的测定，研究了不同磷、钾肥对保水剂吸水、保肥性能的影响。结果表明，保水剂在各种肥料溶液中吸水倍率显著下降，并随肥料浓度的增加下降幅度增加；磷、钾肥对聚丙烯酸钠盐型保水剂的影响大于聚丙烯酰胺-丙烯酸盐型保水剂；不同磷、钾肥对保水剂吸水倍率的影响按磷酸—铵、氯化钾、硫酸钾、过磷酸钙顺序递增。保水剂在大量吸水的同时，也对溶液中的肥料分子或者离子有吸持作用，吸持量均随肥料浓度的增加而增加；保水剂和肥料品种不同，吸持量也不同；保水剂对肥料的吸持率随肥料浓度的增加而降低，最高浓度下，吸持率按过磷酸钙、硫酸钾、氯化钾、磷酸—铵次序依次增大。

英文摘要：

The effects of phosphate and potassium fertilizers on water absorbent and nutrients holding ability of water retaining agent （WRA） were studied by determining water absorbent rate and amounts of absorbed and fixed fertilizers by WRA in different phosphate and potassium fertilizers, such as ammonium phosphate, super phosphate, potassium chloride, and potassium sulfate. The results showed that the water absorbent ability of the WRA decreased obviously along with the increase of concentrations of various fertilizers. Phosphate and potassium fertilizers had stronger influence on polyacrylic salt polymer than polyacrylic salt- polyacry lamide polymer. The effects of phosphate and potassium fertilizers on the water absorbent rate were： ammonium phosphate 〈 potassium chloride 〈 potassium sulfate 〈 super phosphate. When WRAs swelled in water, they absorbed and fixed the molectdes or ions of the fertilizers dissolved in water while they absorbed water. The amounts of absorbed and fixed fertilizers increased with the increase of concentrations of fertilizers, but they were dissimilar in different fertilizer solutions. The rate of absorbed and fixed fertilizers, however, decreased along with the increase of concentrations of fertilizers and had the order： super phosphate 〈 amrnonium phosphate, potassium sulfate 〈 potassium chloride at top concentration.