CN-122010628-A - Formula for producing fulvic acid potassium-containing calcium magnesium phosphate fertilizer and preparation method thereof

CN122010628ACN 122010628 ACN122010628 ACN 122010628ACN-122010628-A

Abstract

The invention discloses a formula and a preparation method for producing a fulvic acid potassium-containing calcium magnesium phosphate fertilizer, and belongs to the field of fertilizer production. Aims at solving the problems of slow release of available phosphorus, low nutrient utilization rate, unbalanced proportioning, uncomfortable formulation and the like of the traditional calcium magnesium phosphate fertilizer. The formula comprises 97.5-99.5% of calcium-containing magnesium phosphate fertilizer, 0.4-2.0% of biochemical potassium fulvate and 0.1-0.5% of activating auxiliary agent in percentage by weight, wherein the activating auxiliary agent is a compound of citric acid and aspartic acid or glutamic acid. The preparation process includes four steps of material pre-treatment, mixing grinding, ageing, curing, sieving and packing, activating the activity of biochemical potassium fulvate with activating assistant, superfine crushing and ageing to form stable nutritious system. The product is solid powder, has low cost and convenient transportation and storage, is suitable for various soils and planting scenes, can obviously improve the release rate of available phosphorus and the utilization rate of nutrients, improves the soil structure, avoids salinization, can optimize the microecology of the soil after long-term application, and promotes the growth and yield increase of crops.

Inventors

Ke Meitao
YANG FAN

Assignees

特拉创新(襄阳)科技发展有限公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (3)

1. A formula for producing a potassium fulvate-containing calcium magnesium phosphate fertilizer comprises calcium magnesium phosphate fertilizer, biochemical potassium fulvate and an activating auxiliary agent, and is characterized in that: The calcium magnesium phosphate fertilizer is an agricultural calcium magnesium phosphate fertilizer, wherein The content is more than or equal to 18%, the CaO content is more than or equal to 30%, the MgO content is more than or equal to 8%, and the grain size is 80-120 meshes, so that the nutrient basis and the dispersion uniformity are ensured; The biochemical potassium fulvate is a high-activity product prepared by taking plant residues as raw materials through biological fermentation, and the organic matter content is more than or equal to 50 percent, The content is more than or equal to 10%, the moisture content is less than or equal to 8%, the particle size is 100-150 meshes, and the active functional groups of the fertilizer can effectively complex ions in the calcium magnesium phosphate fertilizer to promote nutrient release; the activating auxiliary agent is a compound of citric acid and amino acid, the weight ratio of the citric acid to the amino acid is 1:1-3:1, wherein the amino acid is aspartic acid or glutamic acid, the activating auxiliary agent can adjust the pH value of a system, the ineffective combination of biochemical potassium fulvate and calcium magnesium phosphate fertilizer is avoided, and the synergistic activity of the biochemical potassium fulvate and the calcium magnesium phosphate fertilizer is improved.
2. The formula for producing the potassium fulvate-containing calcium magnesium phosphate fertilizer is characterized in that the raw material components of the calcium magnesium phosphate fertilizer, the biochemical potassium fulvate and the activating auxiliary agent are 97.5% -99.5% of the calcium magnesium phosphate fertilizer, 0.4% -2.0% of the biochemical potassium fulvate and 0.1% -0.5% of the activating auxiliary agent according to weight percentage.
3. A method for producing a potassium fulvate-containing calcium magnesium phosphate fertilizer, using a formulation for producing a potassium fulvate-containing calcium magnesium phosphate fertilizer according to claim 2, comprising the steps of: s1, pretreatment of raw materials Placing the calcium magnesium phosphate fertilizer into drying equipment, and drying for 2-3 hours at 80-100 ℃ to remove water until the water content is less than or equal to 5%; mixing the biochemical potassium fulvate with an activating auxiliary agent, uniformly stirring, standing for 15-30 minutes to obtain an activated mixture, fully soaking the biochemical potassium fulvate by the activating auxiliary agent, and activating active functional groups of the biochemical potassium fulvate; S2, mixing and grinding Adding the pretreated calcium magnesium phosphate fertilizer into a double-screw mixer, slowly adding the activated mixture, controlling the mixing rotating speed to be 150-200 r/min, and mixing for 30-60 minutes; Then, the mixed material is sent into an ultrafine grinder, ground to the particle size of 120-180 meshes, the components are ensured to be uniformly dispersed, and the specific surface area is increased to improve the reaction activity; S3, aging and curing Placing the ground material in an aging bin, and aging for 24-48 hours under the conditions of normal temperature and relative humidity of 50% -60%, so that the biochemical potassium fulvate and the calcium magnesium phosphate fertilizer fully undergo complex reaction to form a stable nutrition system; S4, screening and packaging And (5) sieving the aged material by a 120-mesh vibrating screen, returning the oversize material to the superfine pulverizer for regrinding, metering and packaging the undersize material, and thus obtaining the finished product.

Description

Formula for producing fulvic acid potassium-containing calcium magnesium phosphate fertilizer and preparation method thereof Technical Field The invention relates to the field of fertilizer production, in particular to a formula for producing a fulvic acid potassium-containing calcium magnesium phosphate fertilizer and a preparation method thereof. Background The calcium magnesium phosphate fertilizer is an important multi-element fertilizer, is rich in phosphorus, calcium, magnesium, silicon and other nutrient components, and can improve the physical and chemical properties of soil and promote the growth of crops, but the traditional calcium magnesium phosphate fertilizer has the problems of slow release of available phosphorus, low nutrient utilization rate and the like. In the prior art, an attempt is made to compound potassium fulvate with calcium magnesium phosphate, wherein the Chinese patent of the invention with the publication number of CN103265368A discloses a pasty water-soluble fertilizer taking potassium fulvate as a matrix, the formula of the pasty water-soluble fertilizer comprises 2.1-3.8 parts by weight of calcium magnesium phosphate, the adding amount of the potassium fulvate is 80-100 parts by weight, and the preparation method comprises the steps of mixing the potassium fulvate with water to prepare slurry, adding other crushed components, and uniformly stirring to obtain a pasty product. However, the prior art has the obvious defects that firstly, the proportion of components is unbalanced, the adding amount of potassium fulvate is too large (the proportion is far more than 50%), the effect of calcium magnesium phosphate fertilizer serving as a core functional component is weakened, the fertilizer cost is greatly increased, excessive potassium fulvate is easy to cause the enrichment of potassium ions in soil to cause the nutrition unbalance of crops, secondly, the formulation design is unreasonable, the paste formulation depends on a large amount of water as a matrix, the nutrient concentration is limited, the layering and water separation phenomena easily occur in the transportation and storage processes, special equipment is needed for application, the applicability is poor, thirdly, the preparation process does not carry out targeted treatment on the potassium fulvate, the active component of the potassium fulvate is easy to be combined with ions in the calcium magnesium phosphate fertilizer in a non-specific way, the synergistic effect of the potassium fulvate is reduced, the effective phosphorus release efficiency of the calcium magnesium phosphate fertilizer cannot be effectively improved, fourthly, a large amount of water-soluble salts such as potassium nitrate and monoammonium phosphate are introduced into the formulation, and the formulation is easy to be used for the long-term salinization of soil and is not suitable for saline-alkali soil and sensitive soil. Aiming at the defects of the prior art, the development of the potassium fulvate-containing calcium magnesium phosphate fertilizer which has scientific proportion, reasonable formulation and simple preparation, can remarkably improve the nutrient utilization rate of the calcium magnesium phosphate fertilizer and is suitable for various soils is urgently needed Disclosure of Invention The invention aims to provide the biochemical fulvic acid potassium-containing calcium magnesium phosphate fertilizer and the preparation method thereof, and the preparation method thereof improves the preparation process by optimizing the component proportion, reduces the cost, improves the effective phosphorus release rate and the nutrient synergistic utilization rate of the calcium magnesium phosphate fertilizer, is suitable for various soil environments, and is convenient for transportation, storage and application. According to the technical scheme, according to one aspect of the invention, the biochemical fulvic acid potassium-containing calcium magnesium phosphate fertilizer comprises, by weight, 97.5% -99.5% of calcium magnesium phosphate fertilizer, 0.4% -2.0% of biochemical fulvic acid potassium and 0.1% -0.5% of activating auxiliary agent, wherein the range can cover different embodiment proportions, and the activating effect and nutrition supply and cost control are considered. The calcium magnesium phosphate fertilizer is an agricultural calcium magnesium phosphate fertilizer meeting the national standard GB/T20412-2006, whereinThe content is more than or equal to 18%, the CaO content is more than or equal to 30%, the MgO content is more than or equal to 8%, the grain size is 80-120 meshes, and the nutrient basis and the dispersion uniformity are ensured. The biochemical potassium fulvate is a high-activity product prepared by taking plant residues as raw materials through biological fermentation, and the organic matter content is more than or equal to 50 percent,The content is more than or equal to 10%, the moisture content is l