Saline-alkali soil modifying agent with fertilizer synergia effect

Abstract

The invention relates to the technical field of soil modifying agents and fertilizer synergia, and in particular to a saline-alkali soil modifying agent with a fertilizer synergia effect. The modifying agent is prepared from the raw materials in weight percentage: 0.1 to 1% of urease inhibitor NBPT, 1 to 5% of nitrification inhibitor DCD, 1 to 6% of humic acid, 0.1 to 1% of polyglutamic acid, 10 to 30% of anionic type polyacrylamide, 5 to 15% of cationic polyacrylamide, 10 to 20% of aluminum sulfate and 30 to 40% of filler, wherein the urease inhibitor is NBPT, the nitrification inhibitor is DCD, and the filler is zeolite powder and / or diatomite. The modifying agent can improve saline-alkali soil by adjusting soil acidity, adjusting ion constitution and improving a soil aggregate structure; meanwhile, the modifying agent can improve the fertilizer use rate by adjusting enzymatic activity and microbial activity of soil; the problems that a phosphatic fertilizer is low in effectiveness, the nitrogenous fertilizer easily generates ammonia loss by volatilization, and the normal growth of plants is affected as the saline-alkali soil is much in salinity and high in alkali are solved.

Description

technical field [0001] The invention relates to the technical field of soil improver and fertilizer synergism, in particular to a saline-alkali soil improver with fertilizer synergistic function. Background technique [0002] Saline-alkali land is an important resource of usable arable land in our country. With the increasingly sharp contradiction between land degradation, resource shortage and ecological deterioration, people pay more and more attention to the development and utilization of saline-alkali land. At present, the measures to improve saline-alkali land mainly include engineering, biological and chemical measures. Engineering measures require a large investment; biological measures require little investment but are slow to take effect; chemical measures such as adding gypsum, phosphogypsum, and vinegar slag have certain effects and are low in cost, but they are applied in large quantities and are not suitable for long-term application. Moreover, due to the speci...

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Problems solved by technology

The investment of engineering measures is large; the investment of biological measures is small, but the effect is slow; chemical measures such as adding gypsum, phosphogypsum, vinegar slag, etc. have certain effects and low cost, but the amount of application is large, so it is not suitable for long-term application

Moreover, due to the special physical and chemical properties of saline-alkali land such as high pH value, poor permeability, high soil salinity, and high alkalinity, the soil humus is leached and the soil structure is damaged; and the urea applied to the soil is hydrolyzed faster. , easy to cause ammonia volatilization loss; the applied phosphate fertilizer is prone to fixation, and the effectiveness of phosphate fertilizer is reduced; in addition, the saline-alkali soil contains too many soluble salts, resulting in high osmotic pressure of the soil solution, causing physiological drought of plants and affecting the normal growth of plants. cause low crop yields

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