Saline-alkaline soil amendment preparation method

The invention provides a saline-alkaline soil amendment preparation method. The soil amendment is prepared from the following raw materials: cassava residues, gracilaria tenuistipitata, cow dung biochar, cow dung compost, activated sludge, humic acid, bentonite, straw, and biological enzyme. The cow dung compost and bacteria in activated sludge are used to ferment cassava residues and gracilaria tenuistipitata, cow dung biochar, humic acid, straw and other substances are added, the pH value of the soil is reduced, the metal ion content in the soil is reduced, the water retention effect is realized, and fast breeding and growth of the soil microbial flora can be realized, which can help for improving the soil environment. The method utilizes organic waste as a raw material, improves the utilization rate of raw material, prepares the soil amendment which is green sand safe, and has good economic benefits. 本发明提供种盐碱土壤改良剂的制备方法，所述的土壤改良剂由以下原料制备而得：木薯酒糟、细基江蓠、牛粪生物炭、牛粪堆肥、活性污泥、腐殖酸、膨润土、稻草、生物酶剂。利用牛粪堆肥和活性污泥中的菌发酵木薯酒糟和细基江蓠作，添