Saline-alkali soil conditioner as well as preparation method and application thereof

The invention relates to the technical field of soil improvement, and provides a saline-alkali soil conditioner which comprises the following components in parts by weight: 40-80 parts of coal water slurry gasification slag, 1-10 parts of polyacrylamide, 1-10 parts of pyroligneous liquor, 1-10 parts of diatomite and 0-60 parts of sandy soil. The conditioner provided by the invention can effectively slow down the salinization speed of the saline-alkali soil, especially the strong alkaline soil with the pH value of greater than 8.5, and can improve the soil environment and repair the bad soil of the saline-alkali soil. 本发明涉及土壤改良技术领域，提供了一种盐碱地土壤改良剂，按重量份数计，包括水煤浆气化渣40-80份、聚丙烯酰胺1-10份、木醋液1-10份、硅藻土1-10份、沙土0-60份；本发明调理剂可有效减缓盐碱地土壤盐碱化速度，尤其是pH值大于8.5的强碱性土壤，可改善土壤环境，修复盐碱地不良土壤。