Controlled-release fertilizer as well as producing method and using method of controlled-release fertilizer

Abstract

The invention provides a controlled-release fertilizer. The controlled-release fertilizers comprises 50-75 parts of a base fertilizer which is obtained by mixing urea, a calcium magnesium phosphate fertilizer and potassium sulfate in a ratio of 8 to 4 to 17. The controlled-release fertilizer is characterized by further comprising the following components in parts by weight: 2-4 parts of a micro fertilizer which is obtained by mixing borax, zinc sulfate and bunge corydalis herb in a ratio of 1 to 1 to 1.8, 3-5 parts of powder prepared by extracts of aconite, rhizoma anemarrhenae, asarum, siberian cocklebur fruit and Chinese stellera, 10-15 parts of plant ashes, 3-5 parts of modified starch, 2-4 parts of starch-grafted copolymer, 3-5 parts of lignin, 6-8 parts of potassium fulvate, and 5-8 parts of coating materials, wherein the coating materials can be any one of sulfur coating materials, resin coating materials or urease inhibitor coating materials. The controlled-release fertilizer is simple in proportion, convenient to use, long in curative effect, controlled-release in release, comprehensive in nutrition and capable of effectively preventing soil pests and diseases.

Description

Technical field: [0001] The invention relates to the technical field of fertilizers, in particular to a controlled-release fertilizer and its production and use methods. Background technique: [0002] Controlled-release fertilizer is a fertilizer coated with a polymer. The micropores on the membrane are usually only a few hundred nanometers. Liquid water cannot pass through the membrane at all, and can only enter the membrane in the form of water molecules, so water molecules can freely enter and exit the membrane. , fertilizer particles are completely isolated from the outside, while nutrients are excluded from the membrane through the osmotic pressure of the membrane. Therefore, the release speed of nutrients is only related to the movement speed of water molecules and the pores of the membrane micropores. When a controlled-release fertilizer is applied to the soil (the micropores have been set), it is only related to the movement speed of water molecules, and the water mo...

AI Technical Summary

Problems solved by technology

Wild potatoes are highly toxic, and solanine poisoning can cause headaches, diarrhea, convulsions, coma, and even death

However, the toxicity of generally cultivated potatoes is very low, and few potato poisoning incidents occur.

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