Preparation method of full-effect selenium-containing slow-release drug fertilizer

Abstract

The invention discloses a preparation method of a full-effect selenium-containing slow-release drug fertilizer. The preparation method comprises the following steps: adding benfuracarb, sodium selenite and zeolite powder into a granulating machine to perform granulation so as to obtain a drug fertilizer basic core; adding urea into distilled water, adding a sodium hydroxide solution to adjust the pH value, adding formaldehyde for reaction, adding ammonium dihydrogen phosphate, adjusting the pH value by using phosphoric acid, and reacting continuously to obtain urea formaldehyde compound phosphorus; and adding the drug fertilizer basic core into the granulating machine, and performing granulation by using a mixture containing urea formaldehyde compound phosphorus, lignin, sodium selenite and benthiavalicarb-isopropyl, thereby obtaining the full-effect selenium-containing slow-release drug fertilizer. The preparation method disclosed by the invention has the advantages that the process is reasonable, an effect of long-acting relief is achieved, the utilization ratios of pesticides and fertilizers can be improved, selenium and a drug fertilizer are organically combined, and inorganic selenium is absorbed and converted by crops and becomes biological organic selenium enriched in agricultural products.

Description

technical field [0001] The invention relates to a preparation method of full-effect selenium-containing medicinal fertilizer. Background technique [0002] In agricultural production, medicinal fertilizers have the function of killing crop diseases and insect pests or regulating crop growth. But medicinal fertilizer has the problem of short duration of drug effect and fertilizer effect. The drug effect period is generally only 20 days to 30 days, the fertilizer effect period is only 30 days to 50 days, and the crops generally need fertilizer for 90 days to 120 days, so it is necessary to apply pesticides and fertilizers multiple times, which is time-consuming and laborious. The utilization rate of pesticides in medicinal fertilizers is only 30% to 40%, and most of them enter the atmosphere and water due to volatilization and wetting, causing environmental pollution and serious waste of medicinal fertilizers; the utilization rate of fertilizers is also very low, such as ...

AI Technical Summary

Problems solved by technology

However, medicinal fertilizers have the problem of short duration of efficacy and fertilizer effects

The drug effect period is generally only 20 days to 30 days, the fertilizer effect period is only 30 days to 50 days, and the crops generally need fertilizer for 90 days to 120 days, so it is necessary to apply pesticides and fertilizers multiple times, and the operation is time-consuming and laborious.

The utilization rate of pesticides in medicinal fertilizers is only 30% to 40%, and most of them enter the atmosphere and water due to volatilization and wetting, causing environmental pollution and serious waste of medicinal fertilizers; the utilization rate of fertilizers is also very low, such as nitrogen in fertilizers Easy to volatilize, phosphorus in fertilizer is easily fixed by soil colloid, making it difficult for crops to absorb

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