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利用燃煤电厂脱硫石膏改良盐碱地对于废弃物资源化利用和发展循环经济具有重要意义。选择具有典型代表性的宁夏西大滩碱化土壤,采用两因素随机区组田间实验设计,进行脱硫石膏改良碱化土壤种植枸杞的效果实验研究。研究表明脱硫石膏施用量和施用深度不同,对于降低土壤碱化度、总碱度和pH值,改良土壤碱性的效果不同;脱硫石膏施用量不同,对于促进枸杞枝条和径杆的生长不同。施用量24 000 kg/hm2较48 000 kg/hm2提高枸杞枝条生长量10.5%～18.7%、径杆生长量10.5%～18.7%;脱硫石膏施用量24 000 kg/hm2,施用深度60 cm更有利于提高枸杞红果体积、红果鲜重和产量。脱硫石膏施用量24 000 kg/hm2,施用深度60 cm较未施脱硫石膏提高枸杞红果体积、红果鲜重和产量分别为28.3%、15.0%和37.9%。
Utilizing FGD gypsum in coal-fired power plant to improve saline-alkali land is of great significance for the utilization of waste resources and the development of circular economy. A typical representative of Xidatan alkalized soils was selected. Two-factor randomized field experimental design was conducted to study the effect of desulfurized gypsum on improving alkalized soils. The results showed that the application rate of FGD gypsum was different from the application depth, which had different effects on reducing soil alkalinity, total alkalinity and pH, and improving the alkalinity of soil. The different application rates of FGD gypsum promoted the growth of Lycium barbarum shoot and diameter rod. The application of 24 000 kg / hm2 and 48 000 kg / hm2 increased the growth of wolfberry shoots by 10.5% -18.7% and the growth of rod by 10.5% -18.7% respectively. The application of gypsum was 24 000 kg / hm2 and the application depth was 60 cm Help to improve the volume of red goji berries, red fresh weight and yield. Gypsum application rate of 24 000 kg / hm2, application depth of 60 cm compared with no gypsum to improve the volume of Lycium barbarum red fruit fresh weight and yield were 28.3%, 15.0% and 37.9%.