High-nitrogen compound microbial fertilizer as well as preparation method and application thereof

Abstract

The invention relates to the field of microbial fertilizers, in particular to a high-nitrogen compound microbial fertilizer as well as a preparation method and application of the high-nitrogen compound microbial fertilizer. Thehigh-nitrogen compound microbial fertilizer comprises amicrobial fermentation inoculant and potassium fertilizer. The microbial fermentation inoculant is prepared by the following steps: inoculating paenibacillus polymyxa, bacillus subtilis and paenibacillus mucilaginosus intoa microbial fermentation culture medium for fermentation culture, and obtaining the microbial fermentation inoculant after fermentation is finished, the microbial fermentation culture medium comprises the following substances in percentage by mass: 50-80g / L of urea; 210-300 g / L of soybean meal; 30-50 g / L of corn flour; 0.5-30 g / L of calcium chloride; 3-5 g / L of dipotassium phosphate; 0.1 to 10g / L of magnesium sulfate; 0.1 to 10 g / L of manganese sulfate; and water. According to the high-nitrogen compound microbial fertilizer disclosed by the invention, mixed fermentation of various microorganisms does not have an antagonism effect, the activity of a single strain can be obviously improved, the fermentation period is shortened to 2d, and meanwhile, the conversion rate of urea and soybean meal is increased.

Description

technical field [0001] The invention relates to the field of microbial fertilizers, in particular to a high-nitrogen compound microbial fertilizer and its preparation method and application. Background technique [0002] Urea, also known as urea, carbonamide or carbonamide, is synthesized from ammonia and carbon dioxide under high pressure and is the most commonly used dehydrated nitrogen fertilizer product. Urea is the first neutral organic compound synthesized. It exists in the soil in a molecular state after being applied to the soil, but its utilization rate is low, and only a small part of nitrogen is absorbed by the soil colloid. Urea is converted into ammonium carbonate by the action of urease in the soil to form NH4 + -N, its fate is the same as ammonium nitrogen fertilizer. At present, the fertilizer efficiency of urea in my country is generally 20% to 35%, usually lower than 30%. One of the important reasons is that too much or too much activity of urease in the ...

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Problems solved by technology

However, the invention does not specify the specific ratio. If the selection is improper, antagonism may occur between the various strains, resulting in the inability of the strains to coexist or difficulty in exerting their own effects.

Moreover, the culture temperature of bacteria is generally 28-37°C, the culture temperature of yeast is 25-30°C, and the culture temperature of mold is 25-28°C. It is difficult to unify the culture temperature and culture time of different bacteria, and most fungi They are all molds, and molds are too broad, and it is difficult to coordinate the culture temperature and culture cycle, so the preparation is more complicated, and the synergy between strains is difficult to ensure, and it is difficult to achieve the effect of stable nitrogen fixation

There are also literatures disclosing another high-nitrogen compound microbial fertilizer and its preparation method. This technology completes microbial nitrogen fixation, humic acid activation, amino acid synthesis and organic fertilizer fermentation in one step during the biochemical reaction process, which greatly reduces production costs. The amount of urea in this fertilizer is relatively high (10-33%), and the raw materials also contain fish meal and soybean meal, and the fermentation time is as long as 15-25 days

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