Selenium Polysaccharide Hydrogel for Uniform Plant Enrichment
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Solution Overview
Problem
Existing selenium enrichment methods in plants face issues of low selenium content, unbalanced distribution, and environmental pollution due to traditional selenium fertilizers, necessitating a green and efficient solution.
Innovation Solution
A selenium-water-soluble high-molecular polysaccharide hydrogel is prepared by mixing a water-soluble high-molecular polysaccharide with a selenium-containing compound, forming a hydrogel through physical cross-linking, which is applied to enrich plants and recycled for efficient selenium uptake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional selenium fertilizers are applied to enrich plants, then selenium content in agricultural products is improved, but selenium distribution becomes unbalanced and environmental pollution occurs
Solution Approach 1:
The patent uses a water-soluble polysaccharide hydrogel as an intermediary carrier to deliver selenium to plants. The hydrogel encapsulates selenium compounds (such as sodium selenite or selenocystine) and releases them gradually, preventing direct contact of selenium with soil and water, thus avoiding pollution while ensuring uniform distribution and absorption by plants.
Solution Approach 2:
The hydrogel network structure provides porous channels that allow controlled release of selenium ions to plant roots. The porous structure enables uniform distribution of selenium throughout the hydrogel matrix, ensuring consistent enrichment across all plants without localized concentration that would cause pollution.
2Quantity of substance
If traditional selenium fertilizers are used, then selenium enrichment in plants is achieved, but utilization efficiency is low and persistence is poor
Solution Approach 1:
The hydrogel provides periodic, controlled release of selenium to plants over an extended period. Instead of a single large application that runs off with rain, the hydrogel releases selenium ions gradually through its porous structure, maintaining optimal concentrations for plant absorption and significantly improving utilization efficiency and persistence.
3Quantity of substance
If artificial selenium application is performed, then selenium content in agricultural products is improved, but selenium runs away with rain causing pollution
Solution Approach 1:
The hydrogel acts as a retaining intermediary that holds selenium compounds in place within its three-dimensional network. The gel structure prevents selenium from being washed away by rain, as the porous matrix physically constrains the selenium ions until they are gradually released through controlled diffusion to plant roots.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hydrogel method achieves uniform selenium enrichment in plants, avoids pollution, and allows for recycling, ensuring sustainable selenium utilization.
Implementation Method 1
A selenium-water-soluble high-molecular polysaccharide hydrogel is formed by mixing of a water-soluble high-molecular polysaccharide and a selenium-containing compound in an aqueous solution and by the physical cross-linking by the polysaccharide
Implementation Method 2
The hydrogel is applicable to selenium enrichment in plants... can be recycled, to avoid the problems of low selenium content in agricultural products and selenium pollution
Implementation Method 3
the consumption of selenium-rich agricultural products, such as selenium-enriched radish and selenium-enriched rice, is a safe, efficient, and healthy approach
Data Source
AI summary
The invention provides preparation of a selenium-water-soluble high-molecular polysaccharide hydrogel and use thereof. The preparation method includes: (1) water solution of polysaccharide and seleno-compound was prepared by heating the mixture with stirring; and (2) the solution was cooled with standing within shaped container to obtain the selenium-polysaccharide composite hydrogel. Plant seeds are sown on the surface of the composite hydrogel and cultivated to obtain selenium-rich plants. Shape-controllable hydrogel could be prepared by recycled hydrogel through high-temperature dissolution followed with cooling to realize the effective utilization of selenium in the hydrogel. Compared with the traditional selenium enrichment method, current method showed advances in prevent of selenium pollution, which normally caused by the application of selenium fertilizers.