Blue alga based urease inhibitor slow-release agent and preparation method thereof

By using iron III-modified cyanobacteria adsorbent to adsorb NBPT, a cyanobacteria-based urease inhibitor sustained-release body was prepared, which solved the problem of the source of raw materials and complex production processes of biological inhibitors, achieved long-lasting urease inhibition and resource utilization, and reduced the cost of Environmental pollution risks.

CN104193560AInactive Publication Date: 2014-12-10NANJING NORMAL UNIVERSITY
2 Cites 2 Cited by

Patent Information

Application Number
CN201410419959.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2014-08-22
Publication Date
2014-12-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The raw materials of existing biological inhibitors are not widely available, the production process is complex, and there are secondary pollution problems. Moreover, the nitrification inhibitors and urease inhibitors in conventional fertilizers have short half-lives and short effective inhibition times, making it difficult to effectively utilize cyanobacteria resources.

Method used

Cyanobacteria are used as the carrier of the urease inhibitor sustained-release body, and n-butyl thiophosphoric acid triamide (NBPT) is adsorbed through the iron III-modified cyanobacteria adsorbent to prepare cyanobacteria containing 1.0 to 2.5% iron and 1.1 to 2.0% NBPT. Urease inhibitor sustained release body to achieve sustained release effect.

Benefits of technology

In the pH range of 5.5-8.5, NBPT can be continuously released for 24 hours, significantly extending the inhibition time of urease activity in the soil to more than 30 days, reducing the loss rate of NBPT, improving utilization, realizing waste resource utilization, and avoiding environmental pollution. pollute.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to a blue alga based urease inhibitor slow-release agent and a preparation method thereof, belonging to the technical field of high-efficiency utilization of soil fertilizers. The preparation method comprises the following steps: 1, by taking blue alga sludge as a carrier, feeding ferric salt so as to prepare a ferric (III) modified blue alga sludge adsorbent; and 2, adsorbing a urease inhibitor NBPT by using the ferric (III) modified blue alga which is prepared in the step 1 as an adsorbent, thereby preparing the blue alga based NBPT slow-release agent, wherein the ferric content of the slow-release agent is 1.0-2.5%, and the content of NBPT is 1.1-2.0%. According to the blue alga based urease inhibitor slow-release agent, the blue algae sludge is adopted as the slow-release carrier, the raw materials are easy to obtain, the preparation method is simple and can be easily controlled, the purpose of waste recycling is achieved, and meanwhile when the slow-release agent is used in soil, the NBPT loss rate is remarkably reduced, and the problems that generation and supply of ammonia and nitrogen are instable when an ordinary urea and urease inhibitor is used in soil are solved.
Need to check novelty before this filing date? Find Prior Art