Novel polysaccharide gel water retaining and slow release fertilizer

Abstract

The invention discloses a novel polysaccharide gel water retaining and slow release fertilizer and relates to the technical field of slow release fertilizers. The fertilizer consists of fertilizer particles and film covered water retaining and slow release layers covering on the surfaces of the fertilizer surfaces, wherein materials for forming the film covered water retaining and slow release layers comprise tamarindus polysaccharide and plant polysaccharide, and the plant polysaccharide is in crosslinking with the tamarindus polysaccharide and is one or several materials in starch, soluble cellulose, guar gum and konjac polysaccharide. A high molecular gel reticular structure formed by the pure nature plant polysaccharide is used for building a slow release system, so the novel polysaccharide gel water retaining and slow release fertilizer integrating the water retaining and the slow and controlled release is obtained, and the fertilizer has the advantages that stronger water absorption and water retaining performance, the nutrient loss is little, nontoxicity is realized, the biodegradable and environment-friendly effects are realized, and the like. The novel polysaccharide gel water retaining and slow release fertilizer particularly has good market prospects in regions of drought, water lack or regions with great daily evaporation capacity.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a slow-release fertilizer using polysaccharide gel as a water-retaining slow-release layer. Background technique [0002] Fertilizers play an important role in agricultural production. The Food and Agriculture Organization of the United Nations concluded that about 55% of the increase in food production in developing countries comes from chemical fertilizers. my country is a large agricultural country, and the growth of crops mainly depends on the fertilizer and water used, so increasing the utilization rate of these two can effectively improve the growth of crops. However, during the use of common fertilizers currently on the market, 40-70% of nitrogen, 80-90% of phosphorus, and 50-70% of potassium are lost with soil and water, and have no effective effect on the fertilized crops. This is far below the level of developed countries in the world. In the case of ...

AI Technical Summary

Problems solved by technology

Although today's agricultural water-retaining agents have strong water-absorbing and water-retaining properties, they do not have the nutrients necessary for crop growth

However, although the existing slow and controlled release fertilizers on the market have the advantages of long effective time, high utilization rate, less nutrient loss, and environmental friendliness, they do not have strong water absorption and water retention.

If water-retaining agent and slow-release fertilizer are used separately on crops, it will be inconvenient and the cost will increase, and the compatibility between the two may not achieve the desired effect

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