Special carbon-based slow-release nitrogen-potassium fertilizer for flue-cured tobacco, and preparation method thereof

Abstract

The present invention relates to a special carbon-based slow-release nitrogen-potassium fertilizer for flue-cured tobacco. The special carbon-based slow-release nitrogen-potassium fertilizer comprises a biomass granular charcoal and a base fertilizer, wherein the biomass granular charcoal is a rape straw bio-charcoal or corn straw biomass charcoal, the base fertilizer is the mixture of potassium sulfate, potassium nitrate, diammonium hydrogen phosphate, potassium magnesium sulfate and boric acid, the mass ratio of the base fertilizer to the biomass granular charcoal is 7:3, and corn straw or rape straw is carbonized under a 400-450 DEG C anaerobic condition to obtain the biomass granular charcoal. Compared with the existing special fertilizer for flue-cured tobacco, the special carbon-based slow-release nitrogen-potassium fertilizer of the present invention has the following advantages that the slow release effect is good; the raw materials are easy to obtain, and the environment is protected; the quality and the yield of the tobacco can be improved; the environmental protection is achieved, the safety is provided, and after the used biomass granular charcoal is applied into the soil, the physical and chemical structure of the soil can be improved, and the advantages of environmental protection and safety can be provided; and the quality of the product is stable, the particles are uniform and have the particle size of 1-5 mm, the strength of the product particles is high (can achieve more than 30 Newton), and the particles are smooth and complete, are not easily broken during the storage, transportation and circulation process, are not easily agglomerated, and have the good appearance quality.

Description

Technical field [0001] The invention relates to a carbon-based slow-release nitrogen and potassium special fertilizer for flue-cured tobacco and a preparation method thereof, and belongs to the technical field of agricultural fertilizers. Background technique [0002] The fertilization of flue-cured tobacco is the key factor for the proper yield and quality of tobacco, and the nitrogen utilization rate has the greatest impact on the yield and quality of tobacco. When the nitrogen utilization rate is low, it will not only lead to a decline in the output value of the tobacco leaf and affect the economic benefits of the flue-cured tobacco, but also cause a significant reduction in the content of amino acids and petroleum ether extracts in the tobacco leaves, which leads to a decline in the quality of tobacco leaves. In terms of the quality of smoking food, when the nitrogen supply is insufficient, the aroma of tobacco leaves is obviously insufficient, the odor is light, the taste is...

AI Technical Summary

Problems solved by technology

[0004] To this end, a charcoal-based slow-release nitrogen and potassium special fertilizer for flue-cured tobacco was developed, which can realize the slow release of nitrogen and potassium nutrients, ensure the absorption and demand of nitrogen and potassium in the middle and late stages of flue-cured tobacco growth, improve the yield and economic benefits of flue-cured tobacco, and can solve the problem of fertilization in flue-cured tobacco. There are many problems such as high frequency of fertilization, high labor intensity, low fertilizer utilization rate, etc.