脱硫石膏改良碱化土壤种植枸杞的效果研究

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%。

Research on the effect of planting matrimony-vine in alkali soil improved with desulfurized gypsum

Improvement of the saline-alkali land with desulphurized gypsum of coal-fired power plants is greatly important to the waste utilization technology and development of cyclic economy. The experimental research on planting matrimony-vine in alkali soil improved with desulfurized gypsum was conducted selecting the representative alkali soil in Xidatan of Ningxia and adopting the field test of randomized block design of two factors. The research indicates that the desulphurized gypsum could obviously reduce the soil basicity, total alkalinity and pH value and realize the requirements of improving soil alkalinity. But the improvement effect depends on the application rate and depth of the desulphurized gypsum. Promotion of the growth of the matrimony-vine branch and stem depends on the application rate of the desulphurized gypsum. The growth of the matrimony-vine branch and stem with the application rate of 24 000 kg/hm² was 10.5%~18.7% higher than that with the application rate of 48 000 kg/hm². Desulphurized gypsum with the application rate of 24 000 kg/hm² and 60 cm depth helps to increase the volume, fresh weight and output of the matrimony-vine by 28.3%, 15.0% and 37.9% respectively.