A red soil microstructure creating agent based on a double network hydrogel and a preparation method thereof

By constructing a dual-network hydrogel as a microstructure-building agent for red soil, and combining ionic crosslinking, covalent crosslinking, and hierarchical pore design, the problems of poor red soil structure and nutrient loss were solved, thereby achieving soil water and fertilizer retention and increased crop yield.

CN122104230APending Publication Date: 2026-05-29NANCHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANCHANG UNIV
Filing Date
2026-02-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Red soil has poor structure, is prone to compaction, and suffers from severe nutrient loss. Existing soil conditioners have low mechanical strength, limited functions, and poor environmental adaptability, making it difficult to simultaneously achieve water retention and slow fertilizer release.

Method used

A dual-network hydrogel is used, which combines ionic and covalent cross-linking networks, and incorporates quaternized chitosan and hydrophilic macromolecules to construct a multi-level porous microstructure building agent for red soil, thereby enhancing the soil's water and fertilizer retention capacity.

Benefits of technology

It significantly improves soil aggregate stability, reduces soil bulk density, increases capillary porosity, improves soil structure, and enhances crop yield. It is low-cost and highly adaptable to the environment.

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Abstract

The application discloses a kind of red soil microstructure creation agents based on double-network hydrogel and preparation method thereof.The double-network hydrogel is constituted by ionic crosslinking network formed by sodium carboxymethyl cellulose and trivalent iron ions and covalent crosslinking network formed by chitosan crosslinked by epichlorohydrin, and introduces quaternary ammonium chitosan and hydrophilic macromolecule, forms multi-level pore structure.The preparation method includes network construction, compounding, pore forming and post-processing steps.The red soil microstructure creation agent is applied to red soil improvement, can improve soil aggregate stability, reduce soil bulk density by 10%-20%, enhance water-retention capacity to make soil water-holding capacity increase to 800%-1200%, realize fertilizer slow release, nitrogen, phosphorus and potassium release period is extended to 40-60 days, effectively solve the problem of poor structure and weak water and fertilizer retention capacity of red soil, with the advantages of low cost, strong environmental adaptability and the like.
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