Multifunctional compound fertilizer additive and preparation method thereof

Abstract

The invention discloses a multifunctional compound fertilizer additive and a preparation method thereof. The preparation method comprises the following steps: uniformly spraying a compound amino acid complex solution of trace elements containing Fe, B, Mn, Cu, Zn and Mo, rare earth elements containing Ce and La and beneficial mineral elements containing Ni, Co and Ti on grass carbon, brown coal or weathered coal powder, airing or drying, and then crushing to obtain a material A; preparing dicyandiamide used as a nitrification inhibitor into an ammonia solution to be adsorbed on carboxymethyl cellulose used as a water retention agent, airing or drying, and then crushing to obtain a material B; mixing cobalt sulfide and molybdenum sulfide which are used as nitrogen fixation catalysts with bean cakes or corn starch to obtain a material C; and uniformly mixing the material A, the material B and the material C to obtain the additive. The multifunctional compound fertilizer added with the additive of the invention has the advantages of fixing nitrogen, dissolving phosphorus, enriching soil, reducing nutrient loss, improving nutrient utilization ratio, improving crop enzyme activity, promoting metabolism, improving crop quality, increasing crop yield, retaining water, saving water, resisting drought, regulating buffering acidity or saline-alkali soil, and improving soil structure.

Description

technical field

[0001] The invention belongs to the technical field of fertilizer additives, in particular to a multifunctional compound fertilizer additive and a preparation method thereof. Background technique

[0002] At present, there are many brands of multifunctional compound fertilizers produced in China, but the actual use functions are not satisfactory, and some functions have almost no functions. There are many reasons for this result. In order to make the compound fertilizer multifunctional, the methods and measures currently adopted include: adding urease inhibitors and nitrification inhibitors to inhibit the hydrolysis of NH4 by urea + and NH4 + Nitrification, prolonging the fertilizer effect period of nitrogen fertilizer. Because the prices of the two inhibitors are high, the amount of addition is insufficient, and the inhibition is limited. In addition, the two inhibitors are also lost with rainwater or due to soil desertification, just like nitrogen fertil...