Seed germination control coating material, coated seed and preparation method thereof

Abstract

The invention relates to a seed germination control drought-resistant coating material, a coated seed and a preparation method thereof. The coating material mainly comprises an inner layer of the coating material (a water-retaining layer), an intermediate layer of the coating material (a buffer layer) and an outer layer of coating (water control layer). The water-retaining layer contains a water-retaining agent and can play functions of water storing and water retaining; on the one hand, the buffer layer can smoothen and round the surface of the water-retaining layer so as to wrap the water control layer, and on the other hand, the buffer layer can absorb a small amount of water which permeates the water control layer due to the water solubility; the water control layer cannot dissolve in water but can swell to control the pore sizes of water passing pore passages so as to control the water feeding. When the rainfall is small and cannot enable seeds to germinate into seedlings, a micro amount of water permeates the water control layer, then is absorbed by the buffer layer and the water-retaining layer but does not enter the seeds; when the rainfall is abundant, a large amount of water permeates the water control layer, at the moment, the buffer layer is completely corroded, the water-retaining agent absorbs water to rapidly expand so as to break the water control layer, so that the seeds start to absorb water to germinate and successfully grow into the seedlings under the action of the water-retaining agent.

Description

technical field [0001] The invention relates to a drought-resistant coating agent for afforestation seeds, coated seeds and a preparation method for coated seeds, in particular to a coating agent for seeds used for sand control and afforestation aerial sowing, coated seeds and a preparation method thereof, belonging to ecological protection, Restoration and governance areas. Background technique [0002] According to statistics, my country's arid and semi-arid areas account for 52.5% of the total land area, and areas with an average annual precipitation of less than 400 mm account for 45% of the total land area. my country is one of the countries that are seriously harmed by desertification. The main way to prevent and control desertification is to plant trees and grass and restore vegetation. After studying governance, important achievements have been made, but the overall situation is still grim. [0003] As a fast and effective modern afforestation measure, seed granula...

AI Technical Summary

Problems solved by technology

However, the survival rate of seeds after aerial sowing is low, and it is often necessary to continuously aerial sow several times

In these areas, natural precipitation is the most important water source. In many cases, rainfall can satisfy the germination of seeds, but it is not enough to make the seeds germinate and emerge into seedlings. The subsequent drought and the rapid formation of dry sand layers will cause these germinated seeds to Can not get enough water and cannot continue to grow, which will lead to death and reduce the survival rate of seedlings after aerial sowing

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