Humic acid-containing water-soluble fertilizer powder and preparation method thereof

Abstract

The invention provides a water-soluble fertilizer powder containing humic acid and a preparation method of the water-soluble fertilizer powder. The preparation method comprises the following steps: preparing a humic acid complex, preparing functional particles, and conducting modifying and coating. The water-soluble fertilizer powder containing humic acid is good in water solubility and high in humic acid content, the specific gravity of the water-soluble fertilizer powder is 1.33-1.42 g / cm<3> under the condition of 20 DEG C, and the content of water-soluble organic carbon is 14.2-16.1%. The release rate of effective components is stable; the fertilizer utilization rate is high; compared with an existing water-soluble fertilizer, the fertilizer disclosed by the invention has the application amount reduced by 8-10%; and after the fertilizer is applied for one year, the soil moisture content is 26.4-29.7 percent, the soil conductivity is 1.7-1.8, the soil porosity is 31-34 percent, and the content of water-stable aggregates with the particle size of more than 0.25 mm in the soil is improved by 55.2-63.5 percent.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a water-soluble fertilizer powder containing humic acid and a preparation method thereof. Background technique [0002] Humic acid is the remains of animals and plants, mainly the remains of plants, which is a type of organic substance caused and accumulated by a series of processes of microorganisms, decomposition and transformation, and geochemistry. Its total volume is astonishingly large, in the trillions of tons. Rivers, lakes, seas, soil and coal mines, there are traces of it on most of the surface. Due to its widespread existence, it also has a great impact on the earth, involving carbon cycle, mineral migration and accumulation, soil fertility, ecological balance and other aspects. The total amount of humic acid contained in the soil is the largest, but the content in it is less than 1% on average, and the total amount contained in brackish water is not small, but the concent...

AI Technical Summary

Problems solved by technology

[0008] (1) To overcome the problems that the existing water-soluble fertilizers containing humic acid have poor slow-release effect during application, the release rate of active ingredients is unstable, and the effective ingredients are lost too quickly in the early stage of application;