Desulfurized gypsum-based saline-alkali soil improver composition and process for improving saline-alkali soil by using desulfurized gypsum-based saline-alkali soil improver composition

Abstract

The invention discloses a desulfurized gypsum-based saline-alkali soil improver composition and a process for improving saline-alkali soil by using the desulfurized gypsum-based saline-alkali soil improver composition. The desulfurized gypsum-based saline-alkali soil improver composition is prepared from the following raw materials in parts by weight: 600-1200 parts of desulfurized gypsum, 40-70 parts of a high-molecular polymer substance, 50-100 parts of sulfamic acid and 15-40 parts of carbohydrate, wherein the high-molecular polymer substance is one or more of hydrolyzed polyacrylonitrile ammonium salt, polyacrylamide and hydrolyzed polymaleic anhydride; wherein the carbohydrate compound is one or more of D-ribose, D-fructose, water-soluble pentosan and the like; compared with the conventional desulfurized gypsum saline-alkali soil improver, the saline-alkali soil improver composition provided by the invention when used in soil improvement has the advantages that the soil is improved; the physical and chemical properties of the soil can be quickly improved, the pH value and alkalinity of plough layer soil are effectively reduced, the soil structure is obviously improved, the permeability is improved, the synchronous improvement takes effect synchronously, the progress of a single desulfurized gypsum needing 3-5 years is obviously shortened, and the desulfurized gypsum-basedsaline-alkali soil improver composition has important significance.

Description

technical field [0001] The invention relates to the technical field, in particular to a saline-alkali land improvement agent composition based on desulfurized gypsum and a process for saline-alkali land improvement. Background technique [0002] Using desulfurized gypsum to improve saline-alkali land is a commonly used method of chemically improving saline-alkali land, which can reduce the pH value and alkalinity of the soil to a certain extent, but the solubility of desulfurized gypsum itself is low, and it needs a lot of water as a medium after being sprinkled into the soil. It is difficult, and it may further increase the salinization of the soil in areas with high groundwater levels; [0003] After the desulfurized gypsum is applied to the soil and watered, the carbonate and bicarbonate in the soil solution can quickly react with the calcium ions dissolved from the desulfurized gypsum to produce calcium carbonate and calcium bicarbonate with lower solubility, which promo...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems of poor soil permeability and low solubility of desulfurized gypsum in soil when using desulfurized gypsum to improve saline-alkali land, the purpose of the present invention is to provide a saline-alkali land improver composition based on desulfurized gypsum and its use for saline-alkali land improvement craft