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采用室内实验和田间试验,研究了4种不同类型的保水剂在水溶液及土壤中的保水性能及其差异,分析了保水剂类型与用量对保水性能的影响、以及它们对田间土壤贮水量和玉米产量的影响。结果表明:保水剂的保水性能与剂型粒度关系密切,聚丙烯酸盐类以及粒度较小的保水剂在水溶液和土壤中具有较好的持水性能,可将水溶液中的水分蒸发速率降至对照的0.76和0.75倍。保水剂的施用存在一个最佳区间,过量或不足量施用均会降低其保水性能。保水剂对田间土壤的保水效果受作物吸收的影响,保水剂可提高玉米产量和水分利用效率(WUE),淀粉-丙烯酸类聚合物的增产增效效果显著,其中海礁王(HJW)对玉米WUE的增幅高达15.06%。
The effects of different types and amount of water-retaining agent on the water-holding capacity were analyzed by field experiments and field experiments. The effects of different water-holding agents on water retention capacity and corn The impact of production. The results showed that the water retention capacity of the water retention agent is closely related to the particle size of the dosage form. Polyacrylate and the water retention agent with smaller particle size have better water holding capacity in aqueous solution and soil, and can reduce the water evaporation rate in the aqueous solution to the control 0.76 and 0.75 times. There is an optimal range of application of the SAP, and the application of the SAP will reduce the water retention performance. The effect of water-retaining agent on soil water retention was affected by plant absorption. Water-retaining agent could increase the yield and water use efficiency (WUE) of maize and the yield-increasing synergism of starch-acrylic polymer was significant. WUE increased by as much as 15.06%.