燃煤烟气脱硫石膏在新疆盐碱土壤改良中的应用研究

以燃煤烟气脱硫石膏作为化学改良剂,在新疆克拉玛依地区进行碱化土壤改良,土壤改良后种植新疆杨（Populus bolleana Lauche）、白榆（Ulmus pumila L.）、沙棘（Hippohgae rhamnoides L）。分析了烟气脱硫石膏对盐碱地土壤理化性质和树木生长状况的影响。结果表明：处理区土壤的pH值和全盐量比对照区有明显降低,处理区的原始碱化度越高,改良后碱化度的下降幅度越大,而且表层土壤中碱化度的下降最为明显,从29.9%下降到1.43%。改良后树木的平均成活率为71%,比对照区树木的成活率高41%,用燃煤烟气脱硫石膏改良新疆克拉玛依地区碱化土壤种植树木具有极大的推广应用价值。

Study on improving Xinjiang sodic soils amelioration with desulfurized gypsum

Gypsum formed in Flue Gas Desulfurization（FGD）in coal combustion has been used as the chemical enhancer for alka-line soil amelioration in the Karamay area of Xinjiang.Poplar,elm and buckthorn have been planted on the ameliorated soil.The physiochemical properties of the alkaline soil with gypsum addition and the growth of trees have been analyzed.The results indicate that,the Exchangeable Sodium Percentage（ESP）and Total Dissolved Salts（TDS）in ameliorated area have been significantly de-creased comparing to those in control area.The higher initial alkalinity of the ameliorated soil,the bigger decrease of the alkalinity after treatment.The most obvious alkalinity decrease can be found in surface soil,from 29.9% to 1.43%.The surviving rate of planted trees in ameliorated area is 71%,increase 41% than that in control area.The technology of ameliorating alkaline soil by FGD gypsum has demonstrated its great application potentials.