Preparation method for sustained-release microelement fertilizer for controlling plant diseases and insect pests

Abstract

The invention relates to a preparation method for sustained-release microelement fertilizer for controlling plant diseases and insect pests. The method comprises the following steps of: putting 50 to 80 weight parts of acrylic acid in a container, adding 350 weight parts of deionized water, stirring uniformly, and adjusting the pH value by using potassium hydroxide to ensure that the pH value is about 7.0; weighing 30 to 50 weight parts of dried natural goat manure, and crushing the dried natural goat manure into powder with the particle size of 100 meshes; adding the obtained goat manure powder into a solution, adding 60 to 90 weight parts of urea and 10 to 15 weight parts of diammonium hydrogen phosphate, stirring and dissolving, introducing nitrogen, and stirring at high speed for 30 minutes; heating to 65 DEG C under pressure of 0.03 to 0.05Mpa, and pasting for 20 minutes; and adding 1.0 weight part of potassium persulfate salt and 1.0 weight part of sodium sulfite, stirring uniformly, adding 0.5 weight part of N,N-methylene-bisacrylamide, polymerizing at the temperature of between 50 and 60 DEG C for 1 hour to obtain a crosslinking polymerisate, supplementing various trace elements and other nutritional ingredients, and finally adding farm-oriented streptomycin to obtain a final product. Therefore, the fertilizer has the effect of controlling the plant diseases and insect pests.

Description

Technical field [0001] The invention belongs to the field of super absorbent resins, and specifically relates to a preparation method of slow-release micro-fertilizer suitable for preventing diseases and insect pests. Background technique [0002] Trace elements such as zinc, boron, copper, manganese, molybdenum, iron, etc., as essential elements for plant nutrition, entered the agricultural production system in the form of fertilizers. It began in the 1920s and 1930s. As far as the world is concerned, since the 1960s and 1970s At the beginning, it was applied to large-scale production, which was an emerging field and developed rapidly. In the past 20 years, the application area has continued to expand. my country began to study the effects of trace elements on plant growth and development in the 1940s. Research on the content and form of soil trace elements began in the 1950s. In the 1960s, I began to study the application of micro-fertilizers in production, and successively ...

AI Technical Summary

Problems solved by technology

[0009] In agricultural applications, due to the high cost of superabsorbent resins, the application and promotion of superabsorbent resins have been seriously hindered. Many domestic scientists have done a lot of work in reducing the cost of superabsorbent resins, but most of the work is mainly concentrated on Add cheap materials such as bentonite, kaolin and attapulgite to the polymerization system to achieve the purpose of reducing costs. Although adding some inorganic minerals can improve the hydrogel strength of the water-retaining material after absorbing water, but the performance is high. The amount of resin soil added is low, which cannot fundamentally reduce the cost of raw materials

In addition, the product function only has the same water absorption and water release functions as ordinary water-absorbent resins, and lacks nutritional functions.

[0010] The invention patent application with the publication number CN101113119A discloses a water-retaining fertilizer and its preparation method. It is prepared by mixing a superabsorbent resin with a chelating agent. The chelating agent is used to provide some nutrients, and this method has no way to reduce The processing cost of superabsorbent resin and the addition of various components to the finished product further increase the manufacturing cost, and the proportion of trace elements in the fertilizer is unbalanced, making it difficult to achieve a good fertilizer effect