Humic acid-containing foliar fertilizer based on biogas slurry as well as preparation method and application thereof

Abstract

The invention discloses a humic acid-containing foliar fertilizer based on biogas slurry as well as a preparation method and application of the foliar fertilizer. The humic acid-containing foliar fertilizer comprises the following components: humic acid-containing organic mother liquor, nitrogen, phosphorus, potassium and a trace metal element preparation solution, wherein the humic acid-containing organic mother liquor comprises the following components: a biogas slurry concentrated solution, humic acid and an organic weak acid salt; wherein the trace metal element preparation solution is prepared from the following components: water, a zinc salt, a magnesium salt, a calcium salt and chelated iron. All indexes of the humic acid-containing foliar fertilizer based on biogas slurry meet thetechnical indexes of liquid products in <humic acid-containing water-soluble fertilizers>. The fertilizer is diluted with field irrigation water and then sprayed in the earlier stage of booting and the earlier stage of filling of rice, the yield and quality of crops such as rice can be effectively improved, cadmium accumulation in agricultural products is reduced, and the fertilizer has the advantages of being easy and convenient to operate, high in applicability, easy to popularize, remarkable in effect and the like.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to biogas slurry-based foliar fertilizer containing humic acid, a preparation method and application thereof. Background technique [0002] With the development of industrial and mining industries, a large number of heavy metal pollutants enter the farmland soil environment through sewage irrigation and atmospheric deposition, resulting in excessive heavy metals in the soil, which seriously threatens my country's food security. Cadmium (Cd) is a highly harmful toxic carcinogen widely distributed in nature, easily absorbed by rice, and has the characteristics of strong accumulation and long-lasting toxicity. In recent years, cadmium rice incidents in many places have gradually drawn people's attention to cadmium pollution in farmland. How to reduce the absorption of rice paddies and reduce the cadmium content in rice has become one of the hot spots in the field of agr...

AI Technical Summary

Problems solved by technology

[0005] The patent document "A Plant Foliar Fertilizer Prepared Using Biogas Slurry" (publication number: CN 103724088 A) uses biogas slurry, bactericidal substances and vitamins as raw materials to prepare plant foliar fertilizer and then dilutes it by 1 to 5 times. Spraying surface fertilizer on the leaves of crops can quickly promote plant growth, but its product technical indicators and application methods do not meet the requirements of "Water-Soluble Fertilizers Containing Humic Acid" (NY 1106-2010) and "Technical Specifications for Biogas Fertilizer Application" (NY / T 2065-2011) related technical standard requirements, unable to meet product production requirements; the patent document "A Foliar Fertilizer Based on Household Biogas Pond Biogas Slurry and Its Preparation Method" (public number: CN 102249775 A) is based on household The biogas slurry is used as the base liquid, and the foliar fertilizer is prepared by adding nutrient packs, but it also fails to meet the relevant technical standard requirements of "Water-Soluble Fertilizer Containing Humic Acid" (NY 1106-2010), and cannot meet the production requirements of the product; the patent document " A Humic Acid Water-Soluble Fertilizer Specially Used for Drip Irrigation Rice and Its Preparation Method" (Publication No.: CN 107954798A) uses biogas slurry and bacterial liquid for secondary fermentation to obtain fermented liquid, and then adds compound vitamins, inorganic fertilizers, etc. It is made by dispersion treatment, and the operation of the fertilizer making process is relatively complicated and the cycle is long; the patent document "A Foliage Fertilizer for Upland Rice" (publication number: CN 108997052 A) uses biogas slurry as the base liquid, and adds pomace fermentation liquid and other The foliage fertilizer is prepared after the nutrient composition is obtained. The raw materials involved in the fertilizer making process are complex and the pomace fermentation liquid needs to be fermented for more than 10 days at different temperatures and pH environments. The cycle is long, and the pomace is not easy to obtain. The surface fertilizer also fails to meet the relevant technical standard requirements of "Water-Soluble Fertilizer Containing Humic Acid" (NY 1106-2010), and cannot meet the production requirements of the product; A) Potassium fulvic acid and potassium dihydrogen phosphate are used as the main ingredients, and the solid microbial foliar fertilizer is obtained by mixing the mixture of organic and inorganic fertilizers with the accelerator, spraying biogas slurry and biological bacterium powder, and then drying. The fertilizer making process involves many types of material raw materials, and the biogas slurry needs flocculation and activated carbon adsorption treatment, and correspondingly produces solid waste precipitation, which may cause secondary pollution problems

[0006] In summary, the above-mentioned patent documents all use biogas slurry as the base liquid or raw material to prepare foliage fertilizer through secondary fermentation and adding other organic and inorganic nutrient raw materials. The indicators do not meet the requirements of relevant technical standards or the raw materials are complex, the production cycle is long, and the cost is high, which makes it difficult to carry out effective large-scale production and popularization and application

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