Humic acid soil conditioner and its composition, preparation method and use method

Abstract

The invention discloses a humic acid soil conditioner, and a composition, preparation method and application method thereof. The composition comprises, by weight, 8.3 to 16.7 parts of cottonseed meal, 2 to 3 parts of a KOH solution, 0.5 to 2 parts of a polyacrylic acid substance and 0.01 to 3.0 parts of inorganic fertilizer. The preparation method comprises the following steps: preparing cottonseed meal humic acid from the cottonseed meal and KOH solution; and then adding the polyacrylic acid substance and inorganic fertilizer so as to obtain the humic acid soil conditioner. The humic acid soil conditioner is simple in preparation flow, easy to apply and low in cost, can improve the agglomeration structure of soil, growth and development properties of crops and crop yield, has good water-solubility and can be applied wit water; and the humic acid soil conditioner is especially suitable for drip irrigation application, exerts obvious effect and can be extensively promoted and applied in the technical field of agricultural production.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and relates to a humic acid soil conditioner and its composition, preparation method and application method. Background technique [0002] There are more than 10 million tons of cottonseed in China every year, and the annual output of cottonseed cake is more than 6 million tons. The amount of cottonseed cake resources ranks first in the world. Cotton meal is a kind of reddish or yellow granular substance obtained from cottonseed through pressing, leaching and other processes. The toxic substance gossypol contained in cotton meal limits the popularization and application of cottonseed protein products. Therefore, in the existing processing technology, cotton meal is only Used as animal feed. Some scientists in Japan and the former Soviet Union produced regenerated humic acid from mild oxygen decomposition of coal and studied its use in agriculture, but this method is costly and po...

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Problems solved by technology

However, the production cost of existing soil conditioners is too high and the composition is complex, which is not suitable for modern agricultural water and fertilizer facilities such as drip irrigation, which greatly limits the promotion and application of soil conditioners in agricultural production.

Patent CN103320140A discloses a soil conditioner, which improves the soil and has a good effect, but the soil conditioner invented by it has many materials and complex components, which are mixed from various components, and it is not clear It has the function of water retention, increased production and income, and high quality. Its improvement has limitations, and its water solubility is not good. It cannot be applied with water in areas such as drip irrigation.

Patent CN102701885A discloses a soil conditioner. Although the soil conditioner can increase the utilization rate of nitrogen fertilizer and promote the absorption of other elemental fertilizers, its main function is to increase the utilization rate of fertilizer and improve the soil structure. The root system grows and does not have water solubility. Although weathered coal is used as waste, the heavy metals contained in it are harmful to crops and accumulate in the soil, which can cause certain potential pollution to farmland.

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