Method for preparing selenium-water-soluble polysaccharide hydrogel and use thereof in selenium enrichment in plants

Abstract

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.