Production methods of water-retentive biodegradable fertilizer

Abstract

The invention discloses two production methods of a water-retentive biodegradable fertilizer produced with a water-absorbing degradable material. The water-absorbing degradable material is konjak, starch, carboxymethyl cellulose or chitosan. One method comprises the following steps: mixing a chemical fertilizer with the water-absorbing degradable material according to the weight ratio of 20: (1-5), the chemical fertilizer being nitrogen fertilizer, phosphate fertilizer or potash fertilizer, adding water into the mixture, then drying, cutting, sterilizing and subpackaging the mixture to obtain the water-retentive biodegradable fertilizer. The other method comprises the following steps: firstly utilizing the water-absorbing degradable material to filter a body of water by multistage, purifying the eutrophic body of water, after the quality of the body of water is qualified, precipitating, drying, sterilizing and subpackaging the water-absorbing degradable material to obtain the water-retentive biodegradable fertilizer. On one hand, the water-retentive biodegradable fertilizer is provided from the aspect of improving the biodegradability, and on the other hand, the eutrophic body of water is processed in advance to obtain the water-retentive material rich in nitrogen, phosphorus and sulfur, so as to reduce the discharge of nitrogen, phosphorus and sulfur.

Description

technical field [0001] The invention relates to water-retaining chemical fertilizers, in particular to a method for producing water-retaining and biodegradable fertilizers. Background technique [0002] my country's water resources are generally tense, and arid and semi-arid areas are relatively large. Even if some areas are not arid throughout the year, large-scale droughts may occur in a certain period of time, which will affect crop harvests. [0003] Existing drought water retention methods mainly adopt anti-drought measures according to the drought situation itself, such as water transportation, irrigation, etc. In addition, the technology of water retention materials focuses on the water absorption capacity of materials, and the biodegradability of materials is often poor. On the other hand, nitrogen, phosphorus, and sulfur, which are important nutrients for organisms in the water body pollutants, are excessive, thus making the water body eutrophic. In the prior art, ...

AI Technical Summary

Problems solved by technology

Although this method can achieve the effect of purifying the water and adding natural beauty, if the discharge of eutrophic substances is too large (expansion and increase of factories around the water body, the increase of the population around the water body, and the increase of the discharge intensity around the water body, etc., it may cause eutrophic substances. discharge is too large), the practice of planting plant landscapes on the water surface is often unresponsive, and cannot fundamentally solve the problem of water eutrophication