Study On The Ratio Model Of Desulfurization Gypsum And Fly Ash To Improve Saline Land In Shendong Mining Area

In response to the problems of soil salinization in Shendong mining area,desulfurized gypsum and fly ash,and mixture of sludge and slag from a wide range of sources and low prices were selected as modifiers,and desulfurized gypsum was explored through multi-point soil sampling tests in the field and indoor pot experiments.And fly ash,sludge and slag mixture on the improvement effect of saline-alkali soil in mining area and plant growth effect.1.Shendong mining area soil nutrient content is low,Shendong mining area soil pH is high,soil nutrient content is low,SO₄^2-ion content and HCO₃^-content are high in soil anion content,Ca²⁺content and Na⁺content are high in cation content.The percentage of Na⁺in the soil exceeds 15%of cations,which proves that the soil in the mining area is saline-alkaline soil.2.Use desulfurized gypsum,fly ash,and a mixture of sludge and slag(the ratio of sludge to slag is 2:1)as modifiers,and it is determined that the ratio of modifiers of 2:2:2 is better than other ratios.The improvement effect of soil nutrient and salt in the mining area is better;the ratio combination of 1:1:2 modifiers has the best improvement effect on the growth indicators of plants than other combinations.3.The application of solid waste amendment can significantly reduce the pH of the field soil.The application of solid waste amendment can effectively increase the salt content of the soil.After the application of solid waste amendment,the soil sodium adsorption ratio is significantly reduced,and the growth of planted plants is also somewhat different.improve.4.The WOFOST model simulates the effect of saline-alkali soil on plant growth under different irrigation conditions after the improvement of the amendment.With the increase in irrigation volume and frequency,various plant growth indicators have also improved,but excessive irrigation volume and frequency will inhibit plant growth.