缓释型保水剂对土壤物理性状作用及油菜增产效果的研究

Effects of Slow Release Water-retaining Reagent on Soil Physical Properties and Rape Yield

田间小区试验对施用缓释型保水剂、保水剂、常规肥料下土壤物理性状及油菜生长进行了研究。结果表明,缓释型保水剂为植株提供适宜的水分条件,促进了作物生长,油菜产量增加;缓释型保水剂具有保水和持水性能,提高了土壤水分含量,同时改善了土壤物理性状,降低土壤容重,使土壤孔隙数量增加,提高了土壤总孔隙度,尤其增加了非毛管孔隙度,增强了土壤通气性能;缓释型保水剂增加了土壤中大于0.25mm团聚体的数量,从而提高了土壤通气性,同时也增加了土壤中2mm以上的团聚体数量,提高了土壤的抗蚀性。

Soil physical properties and rape growth were investigated in the field expenment, The resuts snowed that release water-retaining reagent provided fitting conditions of moister for the vegetable, improved rape growth and enhanced the yield of rape. water-retaining reagent of relaxed releasing had the capability of retaining and holding soil water, which improved soil physical properties, increased the pore amount in soil and decreased bulk density of the soil. It can enhance the total porosity, especially non-capillary porosity, so it can improve aeration of the soil. Water-retaining reagent of relaxed releasing in creased the amount of water-stable aggregates bigger than 0.25mm so that it advanced aeration of the soil. It could also increase the amount of water-stable aggregate bigger than 2 mm, therefore, improved erode resistance.