Abstract:

Saline-alkali soil is one of important reserve arable land resources for food safety. It has been demonstrated that desulfurised gypsum form coal power station can be used as soil conditioner for saline-alkali soil. However the components of desulfurised gypsum are influenced by coal material employed by power station it is necessary to understand desulfurised gypsum produced by local power station. We found that applying desulfurised gypsum, produced by No:1 Power Station of Taiyuan, to saline-alkali soil had no influences on heavy metal contents in neither soil nor plants. Soil pH could be reduced by desulfurised gypsum application; whereas it increased salt content in soil. Manure application could diminish the increase of salt concentration caused by desulfurised gypsum. The optimum application rate of desulfurised gypsum was 22.5 t/hm2.