微咸水灌溉及改良剂对土壤全盐量影响的模拟试验

Effect of Model Experiment of Brackish Water Irrigation and Soil Amendment Agent on the Variety of Soil Salt

采取5因素多水平组合设计,利用4～5g/L微咸水进行灌溉,模拟1～20年灌溉微咸水的土壤全盐量变化规律。结果表明,0～5cm表层土壤全盐量明显高于其它各层,均在0.200%以上;5～20cm,20～40cm根层土壤全盐量最低;40～60cm土壤全盐量介于表层和根层之间。沸石作为石灰性土壤盐碱改良剂效果最好,比对照全盐量降低0.011～0.070个百分点。磷灰石效果最差,土壤全盐量比对照高近1倍。

This experiment adopted multilevel combinatory design of five f ac tors,modelling irrigated4～5g/L brackish water from1through20years.The results are as follews:the salt in0～5cm and surface soil is higher than that of other layers,the soil salt is more than0.200%generally.The salt in t he soil layer of20～40cm is the lightest,and the salt in siol layer of40 ～60cm is among that of0～5cm and5～20cm or20～40cm.The effect of he ulandite as calcareous soil amendment agent is the best,the soil salt decline d0.011%～0.070%in comparison with ck,the effect of phospho-gypsum is the worst,the soil salt of phosho-gypsum treatment is nearly twice that of ck.