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试验采取5因素多水平组合设计,模拟1～20a灌溉4～5gL-1微咸水及施用不同改良剂对土壤理化性状的影响。试验结果表明:与对照相比,施用4种改良剂土壤水稳性团聚体增加了12.71～45.81%。施用磷石膏1～20a,提高了土壤初始入渗率10.23%。施用磷石膏、沸石40%+磷石膏60%土壤总碱度比对照分别下降了25.74%和10.53%,土壤碱量(AP)分别下降了25.00%、41.67%,Cl-/SO42-比率分别下降了39.20%和57.00%,土壤钠吸附比(SAR)分别下降了99.99%和80.79%。
The experiment adopted a combination of 5 factors and multi-level design to simulate the effects of 1 ~ 20a irrigation with 4 ~ 5gL-1 brackish water and different amendments on soil physical and chemical properties. The results showed that soil water stable aggregates increased by 12.71 ~ 45.81% compared with the control. The application of phosphogypsum 1 ~ 20a, increased the initial soil infiltration rate of 10.23%. Phosphogypsum, 40% of zeolite + 60% of phosphogypsum soil total alkalinity decreased by 25.74% and 10.53%, the soil alkali content (AP) decreased by 25.00%, 41.67%, Cl- / SO42- ratio decreased 39.20% and 57.00% respectively, and the soil sodium adsorption ratio (SAR) decreased by 99.99% and 80.79% respectively.