Preparation method for water retention type humic acid compound fertilizer

Abstract

The invention provides a preparation method for a water retention type humic acid compound fertilizer. The preparation method comprises the following steps: firstly, mixing acrylic acid, a cross-linking agent, an accelerant, a neutralizing agent, water, humic acid, urea, diammonium phosphate and potassium chloride at a certain weight ratio; continuously agitating and reacting; then, drying a reactant at a certain temperature; crushing and sieving to prepare the water retention type humic acid compound fertilizer. According to the method, a macromolecular network cross-linking structure formed by cross-linking and polymerizing the humic acid and the acrylic acid is utilized; after the water retention type humic acid compound fertilizer is applied to soil, a lot of water molecules can be absorbed and are preserved in a colloid manner, so that the irrigation water capacity and the irrigation times are reduced; the requirements of stably supplying the water to a plant root system are met; the production process is simple, needed equipment is less and the preparation cost is low; the water retention type humic acid compound fertilizer is convenient to popularize and promote and is especially applicable to arid regions.

Description

technical field [0001] The invention relates to a preparation method of humic acid compound fertilizer, in particular to a preparation method of water-retaining humic acid compound fertilizer. Background technique [0002] At present, the area of ​​arid land in my country is about 1.511 billion mu, accounting for 76% of the total cultivated land area, of which about 1.171 billion mu has no irrigation conditions. Super absorbent resin is a new type of functional polymer material. It can absorb and maintain hundreds or even thousands of times its own mass of pure water or tens of times of normal saline. It has good effects of drought resistance and water retention, and can be used as a water-retaining agent in agriculture. But because its price is too expensive, it is difficult to popularize and apply it as a water-retaining agent in agriculture. [0003] Humic acid is an organic macromolecular compound widely existing in nature, and it is the main component of soil humus, a...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of common drought in cultivated land, serious soil compaction and low fertilizer utilization rate, the present invention provides a water-retaining humic acid compound fertilizer with multiple functions such as water absorption and water retention, improvement of soil quality, stimulation of crop growth and development, and provision of nutrition for crops. Preparation