脱硫石膏及改良盐碱地效果研究

Effects of Desulfurised Gypsum form Coal Power Station on Improvement of Saline-alkali Soil

利用燃煤电厂脱硫石膏改良盐碱地更好地开发利用山西省后备耕地盐碱地、提升山西省粮食产量,对发展循环经济具有重要意义。利用太原一电厂脱硫石膏和山西省资源较为丰富的风化煤为改良剂,研究其对大同盆地盐碱地土壤重金属、土壤物理化学特性的影响。结果表明:使用太原一电厂的脱硫石膏不会对土壤环境和作物造成重金属污染;施用脱硫石膏能降低土壤pH,但会增加土壤盐分含量,如结合有机物混合施用可以降低土壤盐分含量;脱硫石膏最佳施用量为22.5t/hm2。

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/hm^2.