Saline-alkali soil long-acting improved fertilizer and preparation method thereof

Abstract

The invention discloses a saline-alkali soil long-acting improved fertilizer and a preparation method thereof. The method comprises the steps that 10-20 parts of urea, 5-10 parts of monopotassium phosphate, 10-15 parts of microelement fertilizer are stirred, mixed to be uniform, ground to be powdery, and granulated to obtain mixed fertilizer granules; 3-5 parts of sulphur, 2-4 parts of sodium alga acid and 20-30 parts of potassium humate are mixed to be uniform and ground to be powdery, 5-10 parts of glycerinum is added and uniformly coats the surfaces of mixed granules to be dried and cooled to be sufficiently mixed with 5-20 parts of ardealite, 10-30 parts of livestock and poultry fermentation organic fertilizer and 0.5-2 parts of EDTA to be uniform. Saline and alkali can be effectively lowered for saline-alkali soil, and meanwhile the defects that a common quick-acting fertilizer cannot meet the requirement for fertilizer of the plant growth period, the fertilizer efficiency is low, the fertilizer timeliness is poor, the simple sulfur envelope slow-release fertilizer slow-release function is poor, and the soil improvement effect is affected by soil residues after degradation are overcome.

Description

Technical field [0001] The invention belongs to the technical field of saline-alkali soil improvement, and specifically relates to a long-acting improved fertilizer for saline-alkali soil and a preparation method thereof. Background technique [0002] Due to the main application of chemical fertilizers in agricultural production in my country, soil salinization and secondary salinization are serious. At the same time, there are also a large number of saline-alkali land in some coastal and inland areas. Soil salinization is likely to cause solid nutrients in the soil. The formation and precipitation are not easy to be used by crops, resulting in low fertilizer utilization, and soil salinization is not conducive to the growth and development of crops and affects crop yields. [0003] The application of chemical fertilizers often causes the defects of strong fertilizer effect in the early stage and weakened effect in the later stage. Special slow-release fertilizer is an important mean...

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Problems solved by technology

[0004] In view of the above technical defects, the technical problem to be solved in the present invention is to provide a long-acting saline-alkali soil improvement fertilizer and a preparation method thereof. On the basis of solving the problem that ordinary compound fertilizers and other quick-acting fertilizers cannot meet the fertilizer requirements during the plant growth period, the fertilizer efficiency is low, and the timeliness of the fertilizer cannot be well exerted, while the simple sulfur-coated slow-release fertilizer has poor slow-release function and degrades in the soil after degradation. Defects in the residues affecting the effect of soil improvement

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