Agricultural water retention type fertilizer

Abstract

The invention relates to an agricultural water retention type fertilizer, which is prepared through the following steps that: 10 to 15 weight parts of dry natural sheep manure is weighed and is crushed into powder of 100 meshes; carboxymethyl starch modified kaolin is prepared; 37 to 51 weight parts of phosphorus trichloride and 60 to 70 weight parts of acetone are added into a three-necked bottle provided with a back flow condensing tube and a stirring device, the stirring is carried out for 24 hours at the normal temperature, and then, a certain quantity of glacial acetic acid is added and is stirred for reaction for 10 hours at 30 DEG C; solvents and by-products are distilled out, and isopropenyl phosphonic acid is obtained; sodium carbonate and distilled water are added into a 250mL three-opening bottle provide with a magnetic force stirrer, a temperature indicator and a liquid dripping funnel, and after the dissolution is completed, the sheep manure powder and the kaolin compounded with the carboxymethyl starch are added and stirred for 10 minutes in water bath at 70 DEG C; then, the temperature is lowered to 25 DEG C, 15 to 25 weight parts of crylic acid and 10 to 15 weight parts of isopropenyl phosphonic acid are sequentially added, the continuously stirring is carried out for 5 minutes, and the ultrasonic processing is carried out for 30 minutes; next, initiating agents are added at the room temperature, and the system temperature is raised to 70 DEG C for taking reaction for 3 hours; and after the reaction completion, nutritional ingredients are added, and the final product is prepared. The agricultural water retention type fertilizer has the beneficial effects that the effective nutritional ingredients are reserved, the effective utilization of resources is enlarged, the water absorption rate is greatly improved, and the cost can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of superabsorbent resins, in particular to agricultural water-retaining fertilizers. Background technique [0002] my country is a large agricultural country, and agriculture is the foundation of the national economy and an irreplaceable primary industry. Modern agriculture is characterized by low input, high output, high efficiency and sustainable development. The closely related chemical fertilizer industry and water resource utilization are the important material basis for modern agricultural production and development. Chemical fertilizers play an important role in agricultural production. According to the estimates of the Food and Agriculture Organization of the United Nations (FAO), 55% of the increase in food production in developing countries comes from the role of chemical fertilizers. However, due to factors such as volatilization, loss, and infiltration, the current seasonal utilization rate of chemical ...

AI Technical Summary

Problems solved by technology

[0007] 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.

[0008] 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, while adding various components to the finished product further increases the cost of manufacturing