A kind of high inorganic nutrient granular all-element bio-organic fertilizer and preparation method thereof

Abstract

The invention discloses a granular comprehensive biological organic fertilizer with a high content of inorganic nutrients and a preparation method thereof. The organic fertilizer comprises the following components in percentage by weight: 60.0 to 110.0% of decomposed cow dung, 18.0 to 22.5% of urea, 10.0 to 16.0% of mono-ammonium phosphate, 15.0 to 18.5% of potassium sulfate, 1.0 to 5.0% of calcium-magnesium-phosphor fertilizer, 0.0 to 5.0% of clay, 0.3 to 0.5% of animal grease, 0.5 to 1.0% of adhesive, and 0.1 to 1.0% of microbe powder. The animal grease is used to separate abundant inorganicnutrients from microbes. The adhesive, which has a good bonding property and biocompatibility, is used to adsorb microbe powder. At the same time, the adhesive is applied to the soil as a fertilizerand supplies nutrients for the growth and reproduction of microbes. The industrial wastes are converted into resources. The fertilizer has the advantages that the inorganic nutrients can be absorbed rapidly, the organic substances can supply nutrients for a long term, and the biological inoculant generates a synergistic effect. The fertilizer can be easily produced by adding an adhesive tank, a metering pump, and a nozzle on an inorganic-organic device and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of microbial fertilizers, in particular to a high-inorganic nutrient granule full-element bio-organic fertilizer and a preparation method thereof. Background technique [0002] Fertilizers provide essential nutrients for crop growth and development, which is the key to increasing production and harvest. Chemical fertilizers have played an indelible contribution to ensuring food security in our country. my country is a big country in the production and use of chemical fertilizers, with the world's largest fertilizer output and fertilizer use intensity, but the lowest fertilizer utilization rate in the world, only 25% to 35%. The long-term excessive application and inefficient use of chemical fertilizers have caused serious damage to the soil structure, such as soil compaction, soil salinization, soil acidification, and decline in soil organic matter content, which eventually lead to a continuous decline in fertilizer u...

AI Technical Summary

Problems solved by technology

The long-term excessive application and inefficient use of chemical fertilizers have caused serious damage to the soil structure, such as soil compaction, soil salinization, soil acidification, and decline in soil organic matter content, which eventually lead to a continuous decline in fertilizer use efficiency, declining quality of agricultural products, and increasing environmental pollution. serious

[0003] Microbial fertilizer is a new type of fertilizer. Through the life activities of microorganisms contained in it, it can increase the supply of plant nutrients or promote plant growth, increase yield, improve the quality of agricultural products and the agricultural ecological environment (NY1113-2006 microbial fertilizer term), due to microbial fertilizer The microorganisms in the fertilizer must be living organisms to function, which limits the inability to add a large amount of inorganic nutrients to microbial fertilizers, because the high salt, high osmotic pressure, high nitrogen, and acidity introduced by inorganic materials will directly affect the microorganisms that come into contact with them. , the low inorganic nutrient content in microbial fertilizers is not enough to meet the nutritional needs of crops in the current season, and the amount used is too small to meet the needs of stable agricultural production, which limits the use of microbial fertilizers

The solid dosage form of microbial fertilizer includes powder and granule. The cost of powder microbial fertilizer is low because it does not need to introduce granulation equipment, and the process is relatively simple. The microbial fertilizer produced by most microbial fertilizer manufacturers is powder, but due to excessive water content (20%-30%) and powder form are not conducive to the preservation of microorganisms and mechanized large-scale application, especially in the case of excessive water content and high inorganic nutrients (total nutrients > 15%, inorganic salt mass fraction > 30%), Due to the direct contact of microorganisms with fertilizers, high salt and high osmotic pressure lead to massive death of microorganisms

Granular microbial fertilizers can reduce the water content to below 20% or even lower due to the drying process. The common ways of adding granular microbial fertilizers are in liquid form and solid powder form. The liquid form is mainly sprayed with microbial fermentation liquid On the surface of granular fertilizers, this method is limited by the capital and technology of the production enterprises, and the general enterprises cannot guarantee the stability and purity of microbial fermentation, and the fermentation liquid is not resistant to storage, and it is easy to contaminate miscellaneous bacteria

Because microorganisms are not resistant to high temperature for a long time, microbial solid bacterial powder is generally added in the coating process after the drying and cooling process. Most manufacturers directly add powder on the surface of fertilizer particles during coating. This process is relatively simple, but When the water content of the fertilizer granules is low (<5%), because the surface of the fertilizer granules is too dry, and the coating oil is generally a hydrophobic compound, it is difficult for the bacterial powder to adsorb on the surface of the fertilizer granules. The surface falls off and settles at the bottom of the packaging bag, resulting in a reduction in the number of viable bacteria in the sampling test or even substandard and uneven application.

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