In-situ liquid gel-forming water-retaining agent, its preparation method and application

By applying a combination of natural modified polymers and cationic crosslinking agents in stages, hydrogels are formed in situ, solving the problem of clogging in drip irrigation systems, achieving integrated water retention and nutrient supply, promoting crop growth and improving soil environmental friendliness.

CN122256019APending Publication Date: 2026-06-23XINJIANG AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINJIANG AGRI UNIV
Filing Date
2026-03-26
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing water-retaining agents have clogging problems in drip irrigation systems, making it difficult to achieve compatibility with drip irrigation systems. They also have limited functionality, cannot provide micronutrients in a coordinated manner, and are not environmentally friendly.

Method used

The method employs two components, A and B, which are applied in stages. Component A is an aqueous solution of a natural modified polymer, and component B is an aqueous solution of a cationic crosslinking agent. These components are applied to the soil through a drip irrigation system, where they crosslink in situ to form a hydrogel, thereby achieving water retention and slow release of trace elements.

Benefits of technology

It achieves a high degree of integration between the water-retaining agent and the drip irrigation system, providing significant water and heat retention effects, and can slowly release trace elements to promote crop growth, while also being environmentally friendly.

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Abstract

The application provides an in-situ liquid gel-forming water-retaining agent and a preparation method and application thereof. The water-retaining agent is composed of A component and B component which are applied in steps. The A component contains an aqueous solution of a natural modified polymer, and the natural modified polymer is selected from one or two of carboxymethyl chitosan, carboxymethyl cellulose or a sodium salt thereof. The B component contains an aqueous solution of a cationic crosslinking agent, and the cationic crosslinking agent is selected from one or more cations of copper nitrate, iron nitrate, zinc nitrate, manganese nitrate, chitosan quaternary ammonium salt, calcium nitrate and magnesium nitrate. The water-retaining agent can realize the integrated functions of slow release of trace elements, water retention, soil improvement and precise nutrition supply. Furthermore, the water-retaining agent is applied to crop growth in combination with the "step-by-step drip irrigation and in-situ gel formation" technology, so that the agronomic characters of crops can be significantly improved.
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