Biomass fertilizer for improving soil environment and preparation method thereof
By preparing a composite hydrogel of lignin graft copolymer and modified sodium alginate, combined with biochar and other components, the problem of insufficient water retention and antibacterial effect of biomass fertilizer was solved, and a better soil environment improvement effect was achieved.
CN121159342BActive Publication Date: 2026-05-26
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Filing Date
- 2025-09-28
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing biomass fertilizers are insufficient in terms of water retention and antibacterial effects, making it difficult to effectively improve the soil environment.
Method used
By preparing lignin graft copolymers and modified sodium alginate, combined with calcium ion crosslinking agents, a composite hydrogel is formed. Biochar, urea, and potassium dihydrogen phosphate are then added to form a biomass fertilizer that improves the soil environment.
Benefits of technology
It improves the water retention and antibacterial effects of fertilizers, and enhances the soil's ability to retain water and inhibit bacteria.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN121159342B_ABST
Abstract
This invention relates to the field of fertilizer technology and discloses a biomass fertilizer for improving the soil environment and its preparation method. The invention uses lignin graft copolymer and modified sodium alginate as raw materials, and prepares a composite hydrogel using the calcium ion in-situ gelation method. Biochar, urea, and potassium dihydrogen phosphate are then added to the hydrogel to obtain a biomass fertilizer for improving the soil environment. The pyrrole groups in the lignin graft copolymer and the nitrogen atoms in the Mannich base structure act as hydrogen bond acceptors, enhancing the hydrogen bonding with the hydrogel molecular chains and improving the water retention capacity of the fertilizer. The rigid structure of lignin itself also plays a role in the gel network, reducing the collapse of the cross-linked network, thereby forming a richer three-dimensional porous structure and enhancing the water retention capacity of the fertilizer. Quaternary ammonium salt groups can disrupt the bacterial cell membrane structure, leading to the extravasation of bacterial substances and enhancing the antibacterial effect of the fertilizer. Thiourea groups can bind to enzymes within bacterial cells, exerting an antibacterial effect.
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