Qinghai cold land bluegrass seed coating agent and preparation method thereof

The seed coating agent for Kentucky bluegrass in cold regions of Qinghai, with its three-layer heterogeneous structure, solves the problems of antagonism and functional mismatch of bioactive components in seed coating technology in high-altitude and cold regions. It enables efficient germination and seedling growth of seeds in high-altitude and cold environments and improves the freeze-thaw resistance and microbial activity of the coating agent.

CN121286485APending Publication Date: 2026-01-09QINGHAI SANJIANG GRP FORAGE SEED BREEDING FARM CO LTD
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Patent Information

Application Number
CN202511476132.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-16
Publication Date
2026-01-09

AI Technical Summary

Technical Problem

When existing seed coating technologies are applied in high-altitude and cold regions, the homogenization and mixing strategy leads to antagonism between bioactive components, a severe mismatch between the timing of functional release and the physiological rhythm of seeds, and rapid failure of the coating physical structure under severe freeze-thaw cycles. This makes it impossible to provide a spatiotemporally ordered and functionally synergistic microenvironment for diverse active components with different functions and conflicting needs.

Method used

The seed coating agent for Qinghai cold-region Kentucky bluegrass, which adopts a three-layer heterogeneous structure, includes a biological core layer, a nutrient buffer layer, and a functional protective layer. These layers are composed of compound microbial agents, low-temperature germination inducers and slow-release nutrient microcapsules, and an interpenetrating network polymer skeleton, respectively. The coating agent is constructed through a precisely controlled sequential coating process to achieve functional zoning and time-sequential release.

Benefits of technology

It achieves spatial isolation and temporal sequential release of microorganisms, nutrients and germination regulators, enhances the long-lasting effectiveness of coating in high-altitude and cold environments, and improves seed germination rate and seedling biomass, which is significantly better than traditional coating.

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Abstract

The invention belongs to the technical field of multifunctional composite seed coatings for ecological restoration of high and cold regions, discloses a Qinghai cold-region bluegrass seed coating agent and a preparation method thereof, and aims to solve the composite problems of component antagonism, time sequence mismatch, freeze-thaw failure and the like in the prior art. The coating agent is characterized in that a three-layer composite structure of a biological core layer, a nutrition buffer layer and a functional protection layer is sequentially coated on the surface of a seed from inside to outside. The biological core layer comprises complex microbial inoculant particles and a first adhesive; the nutrition buffer layer comprises a low-temperature germination inducer, a slow-release nutrition microcapsule and a second adhesive; the functional protection layer comprises an interpenetrating network polymer skeleton, high molecular weight sodium alginate, nano silicon dioxide particles subjected to surface modification by a silane coupling agent KH-570 and food-grade indigo dye. By means of the scheme, efficient germination and stable planting of the Qinghai cold land bluegrass seeds in the high and cold environment are achieved.
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