Microorganism-containing compound fertilizer and preparation method thereof

Abstract

The invention discloses microorganism-containing compound fertilizer and a preparation method thereof. The microorganism-containing compound fertilizer has a water content of less than or equal to 5.0%; based on a mass fraction, the total nutrient of nitrogen, phosphorus and potassium is more than or equal to 35%, and the effective viable cell count is not less than 2.0*10<7> CFU / g; the compound fertilizer is mainly prepared from 10-40% of urea, 10-35% of monoammonium phosphate, 10-40% of ammonium sulfate, 10-40% of potassium sulfate, 10-35% of potassium chloride, 2-15% of calcium-magnesium-phosphate fertilizer, 2-15% of clay, 0.3-0.5% of coating material and 0.01-1% of microbial powder. The preparation method provided by the invention effectively avoids the influence of high temperature on effective viable counts of microorganisms in a fertilizer production process; the yield, single plant weight and Vc content of lettuce treated by using the compound fertilizer provided by the invention are generally higher than those of lettuce treated by using the common compound fertilizer; the effect of the compound fertilizer is significantly higher than that of the similar products in the market; the compound fertilizer can increase the yield and improve the quality, maintains the survival rate of the microbial agent, and has certain stability.

Description

technical field [0001] The invention relates to the field of chemical fertilizers, in particular to a compound fertilizer containing microorganisms and a preparation method thereof. Background technique [0002] Chemical fertilizers are referred to as chemical fertilizers. Fertilizers made by chemical or physical methods containing one or several nutrients needed for crop growth are also called inorganic fertilizers, including nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, micro-fertilizers, and compound fertilizers. [0003] They have the following common characteristics: simple ingredients, high nutrient content; quick fertilizer effect, strong fertilizer; some fertilizers have acid-base reaction; generally do not contain organic matter, and have no effect of improving soil and fertilizing. There are many types of chemical fertilizers, and their properties and application methods are quite different. [0004] The long-term unreasonable application o...

AI Technical Summary

Problems solved by technology

[0005] The traditional granular fertilizer process adopts continuous two-stage drying and continuous two-stage cooling after the granulation process. The drying temperature is high, which affects the addition of active microorganisms; and the powdery microbial agent is rolled onto the During the surface process of fertilizer granules, due to the low water content of the fertilizer and the dry surface, it is easy to cause problems such as shedding, unevenness, and low utilization rate of the bacterial agent. The liquid bacterial agent spraying method is used, and the spraying is relatively uniform, but a low-temperature drying process is required to be added later. , has higher requirements on the production temperature control process

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