水盐胁迫下脱硫石膏对苏打型碱化土理化性质及玉米产量的影响

目的]研究施用脱硫石膏对内陆表层苏打型碱化土及典型作物的影响。方法]在水盐胁迫条件下,通过不同用量的脱硫石膏施用对比试验,分析了其对表层苏打型碱化土理化性质及玉米产量的影响。结果]脱硫石膏可以显著降低表层苏打型碱化土pH值,抑制碱化度（ESP）,降低土壤CO23-、HCO-3、Cl-、K＋含量,但同时会增加根层Ca2＋、Mg2＋含量,提高土壤可溶性盐含量（EC）值。脱硫石膏也可以显著改善表层苏打型碱化土的物理性状,使土壤表层容重下降,土壤三相比中气相率增加,固相率降低,孔隙率增加,土壤硬度降低,活化了根际土壤养分,使土壤养分活性增强,植物吸收养分能力提高,作物生长环境得到改善。结论]合理的脱硫石膏用量会提高苏打型碱化土上玉米产量。

Effect of Desulphurization Gypsum on Physical and Chemical Characteristics of Soda-type of Alkaline Soil and Maize Yield under Water-Salt Stress

Objective] The effects of desulphurization gypsum on the physical and chemical character of sodic soil of inland and typical crop yield was researched.Method] Under water-salt stress,the compared experiment in the efficiency of different quantities of desulphurization gypsum on the physical and chemical character of sodic soil and typical crop yield was conducted.Results] The result showed that the treatment of desulphurization gypsum could significantly reduce pH value,Inhibit ESP,reduce the content of ...