CN102816027B - Preparation method of composite coated fertilizer containing amino acid chelating solution specially used for soybean basal fertilizer - Google Patents

Abstract

The invention discloses a preparation method of a composite coated fertilizer containing amino acid chelating liquid specially used for soybean base fertilizer. -5 parts by weight of zinc sulfate, 1-2 parts by weight of borax, 1-3 parts by weight of flavescens powder, 1-2 parts by weight of gelatin powder, and 3-5 parts by weight of compound powder are mixed evenly by weight, and then sprayed into 4 - 6 parts by weight of amino acid chelating liquid and 4-5 parts by weight of binding liquid are granulated to obtain compound fertilizer granules; 7-10 parts by weight of molten paraffin coating is sprayed on the surface of 100 parts by weight of compound fertilizer particles to obtain the product. In the invention, the compound fertilizer is prepared by rationally compounding various nutrient elements required for soybean growth, and has the advantages of light weight, water retention, fertilizer retention and excellent slow-release performance.

Description

A kind of preparation method of compound coated fertilizer containing amino acid chelating liquid special for soybean base fertilizer

technical field

The invention relates to the field of fertilizers, in particular to a method for preparing a compound-coated fertilizer specially used for soybean base fertilizers containing amino acid chelating liquid.

Background technique

Coated fertilizers are also called coated fertilizers and film fertilizers. Fertilizers made of quick-acting fertilizer granules wrapped with semi-permeable or impermeable film substances. Film-forming substances include plastics, resins, paraffin, polyethylene and elemental sulfur. The purpose of the coating is to slowly release the quick-acting nutrients in the coated fertilizer after it is applied to the soil, so as to prolong the fertilizer effect. The release rate depends on the type of coating, thickness, particle size, fertilizer solubility, soil temperature, soil water content, and soil microbial activity. It is suitable for crops with high economic value, long growth period, large amount of fertilizer but inconvenient to fertilize in batches, and high temperature, rainy areas or irrigated areas where nutrients are prone to leaching, especially on light sandy soil. Most of the existing coated fertilizers lack pertinence.

Contents of the invention

The purpose of the present invention is to provide a kind of preparation method of the composite coated fertilizer containing amino acid chelating liquid specially used for soybean base fertilizer with strong pertinence and good effect.

The above purpose is achieved through the following schemes:

A kind of preparation method of the composite coated fertilizer containing amino acid chelating liquid special for soybean base fertilizer, it is characterized in that: comprise the following steps:

(1) Mix raw materials 1-3 parts by weight of calcium carbonate, 1-2 parts by weight of iron ore, 1-2 parts by weight of dolomite, 1-2 parts by weight of potassium feldspar, 1-2 parts by weight of slag, and then mix them in 400 After burning at -500°C for 6-8 hours, add corn oil of 1-2% of the total weight of the above-mentioned raw materials to grind into powder, and mix with 2-4 parts by weight of fulvic acid to obtain a compound powder for use;

(2) Add animal feathers to 25-35% sulfuric acid and hydrolyze at 100-110°C for 1-2 hours to generate amino acids, then add lime to neutralize to pH 6.0-6.8 to obtain a hydrolyzate, 15 parts by weight Add 3-4 parts by weight of carboxymethyl cellulose to the hydrolyzate, then add 1-2 parts by weight of ferrous sulfate and 3-4 parts by weight of ammonium molybdate to dissolve, and react at 90-105°C for 5-6 hours to obtain amino acid chelate Combined liquid standby;

(3) 10-12 parts by weight of urea, 22-25 parts by weight of diammonium phosphate, 18-22 parts by weight of potassium chloride, 2-5 parts by weight of zinc sulfate, 1-2 parts by weight of borax, 1-3 parts by weight of bitter Ginseng powder, 1-2 parts by weight of gelatin powder, and 3-5 parts by weight of compound powder are uniformly mixed according to parts by weight, then sprayed with 4-6 parts by weight of amino acid chelating liquid and 4-5 parts by weight of binding liquid, and granulated , to obtain compound fertilizer granules;

(4) Spray 7-10 parts by weight of molten paraffin coating on the surface of 100 parts by weight of compound fertilizer particles to obtain the product.

The preparation method of the compound coated fertilizer containing amino acid chelating liquid special for a kind of soybean base fertilizer is characterized in that: the bonding liquid refers to water glass, styrene-acrylic emulsion, vinegar-acrylic emulsion, phenolic resin, polyester One of vinyl acetate emulsion and rosin.

The preparation method of the composite coated fertilizer containing amino acid chelating liquid for soybean base fertilizer is characterized in that the specific gravity of the hydrolyzed liquid is 1.1-1.3 g/ml.

The preparation method of the composite coated fertilizer containing amino acid chelating liquid for soybean base fertilizer is characterized in that: every 80-150g of animal feathers is hydrolyzed with 200-300ml of sulfuric acid with a concentration of 25-35%.

The preparation method of the compound coated fertilizer containing amino acid chelating liquid special for a kind of soybean base fertilizer is characterized in that: the operation process of step (4) is: put the compound fertilizer granules in parts by weight in the drum coater, 60 Preheat at -70°C for 12-15min, the rotating speed of the coating machine is 40-50r/min, spray heated and molten paraffin into the drum, after spraying the paraffin by weight, reduce the temperature to 20-30°C, wrap The rotating speed of the washing machine is 35-45r/min. After 12-15 minutes, the material is discharged, and the product is obtained after cooling and drying at room temperature.

The beneficial effects of the present invention are:

In the invention, the compound fertilizer is prepared by rationally compounding various nutrient elements required for soybean growth, and has the advantages of light weight, water retention, fertilizer retention and excellent slow-release performance. Sophora flavescens has bactericidal and insecticidal effects, and it can be ground into powder and mixed into compound fertilizers to help prevent and control pests and diseases. The amino acid chelating liquid mixes micro-elements and medium-quantity elements in it, which increases the nutrition of the fertilizer and at the same time allows the micro- and medium-quantity elements to be released more slowly.

Paraffin as the outer coating agent can adjust the slow-release effect of the coated fertilizer. Through the good adsorption of chemical fertilizer nutrients by the compound powder and the blocking effect on the penetration of soil pore water to delay the release of chemical fertilizer nutrients, good results have been achieved. At the same time, it also enriches the nutritional elements of fertilizers together with the amino acid chelating solution.

Detailed ways

A kind of preparation method of the compound coating fertilizer special-purpose containing amino acid chelating liquid of soybean base fertilizer, comprises the following steps:

(1) Mix raw materials 3kg calcium carbonate, 1kg iron ore, 1kg dolomite, 1kg potassium feldspar, 1kg slag, burn at 500°C for 6 hours, add 1% of the total weight of the above raw materials and grind them into powder , after mixing with 4kg fulvic acid by weight, the compound powder is ready for use;

(2) First add animal feathers to 30% sulfuric acid and hydrolyze at 100-110°C for 1-2 hours to generate amino acids, then add lime to neutralize to a pH value of 6.0-6.8 to obtain a hydrolyzate, add 3kg per 15kg of hydrolyzate Carboxymethyl cellulose, then add 1kg of ferrous sulfate and 3kg of ammonium molybdate to dissolve, and react at 90-105°C for 5-6 hours to obtain the amino acid chelating solution for later use;

(3) Mix 10kg of urea, 25kg of diammonium phosphate, 20kg of potassium chloride, 3kg of zinc sulfate, 1kg of borax, 1.5kg of flavescens powder, 1.5kg of gelatin powder, and 3kg of compound powder in parts by weight, and then spray into 5kg Amino acid chelating liquid and 4kg vinegar-acrylic emulsion are granulated to obtain compound fertilizer granules;

(4) Put 100kg of compound fertilizer granules in the drum coating machine, preheat at 70°C for 15 minutes, and spray 10 kg of heated and melted paraffin into the drum coating machine at a speed of 50 r/min. After spraying the paraffin, put The temperature drops to 25°C, the rotating speed of the coating machine is 40r/min, and after 15 minutes, the material is discharged, and the product is obtained after cooling and drying at room temperature.

Every 150g of animal feathers is hydrolyzed with 300ml of 25% sulfuric acid.

Compared with the application of the same amount of common nitrogen fertilizer, the application of the fertilizer obtained by the invention increases the yield of soybeans by 20-30% on average.

According to the national standard "Slow-release fertilizer" (GB/T23348-2009), the slow-release fertilizer should be soaked in still water at 25°C for 24 hours with an initial nutrient release rate of less than 15%, and a 28-day cumulative nutrient release rate of less than 80%.

Table 1 Product Index Comparison

As can be seen from Table 1, the product obtained in this embodiment meets the national standard

Claims (5)

1. a kind of preparation method of the composite coated fertilizer that contains amino acid chelating liquid special for soybean base fertilizer, it is characterized in that: comprise the following steps: (1) Mix raw materials 1-3 parts by weight of calcium carbonate, 1-2 parts by weight of iron ore, 1-2 parts by weight of dolomite, 1-2 parts by weight of potassium feldspar, 1-2 parts by weight of slag, and then mix them in 400 After burning at -500°C for 6-8 hours, add corn oil of 1-2% of the total weight of the above-mentioned raw materials to grind into powder, and mix with 2-4 parts by weight of fulvic acid to obtain a compound powder for use; (2) Add animal feathers to 25-35% sulfuric acid and hydrolyze at 100-110°C for 1-2 hours to generate amino acids, then add lime to neutralize to pH 6.0-6.8 to obtain a hydrolyzate, 15 parts by weight Add 3-4 parts by weight of carboxymethyl cellulose to the hydrolyzate, then add 1-2 parts by weight of ferrous sulfate and 3-4 parts by weight of ammonium molybdate to dissolve, and react at 90-105°C for 5-6 hours to obtain amino acid chelate Combined liquid standby; (3) 10-12 parts by weight of urea, 22-25 parts by weight of diammonium phosphate, 18-22 parts by weight of potassium chloride, 2-5 parts by weight of zinc sulfate, 1-2 parts by weight of borax, 1-3 parts by weight of bitter Ginseng powder, 1-2 parts by weight of gelatin powder, and 3-5 parts by weight of compound powder are uniformly mixed according to parts by weight, and then sprayed with 4-6 parts by weight of amino acid chelating liquid and 4-5 parts by weight of binding liquid, and granulated , to obtain compound fertilizer granules; (4) Spray 7-10 parts by weight of molten paraffin coating on the surface of 100 parts by weight of compound fertilizer particles to obtain the product. 2. the preparation method of the composite coated fertilizer containing amino acid chelating liquid special for a kind of soybean bottom fertilizer according to claim 1, is characterized in that: described binding liquid refers to water glass, styrene-acrylic emulsion, vinegar acrylic One of emulsion, phenolic resin, polyvinyl acetate emulsion and rosin. 3. The method for preparing a composite coated fertilizer containing amino acid chelating liquid for soybean base fertilizer according to claim 1, characterized in that: the specific gravity of the hydrolyzed liquid is 1.1-1.3 g/ml. 4. the preparation method of the composite coating fertilizer of a kind of soybean base fertilizer special-purpose containing amino acid chelating liquid according to claim 1, is characterized in that: every 80-150g animal feather adopts the concentration of 200-300ml to be 25-35% Sulfuric acid hydrolysis. 5. the preparation method of the composite coated fertilizer containing amino acid chelating liquid special for a kind of soybean base fertilizer according to claim 1, is characterized in that: step (4) operating technique is: put in drum coater by weight parts Put the compound fertilizer granules, preheat at 60-70°C for 12-15min, the rotating speed of the coating machine is at 40-50r/min, spray heated and melted paraffin in the tumbler, after spraying the paraffin in parts by weight, lower the temperature to 20-30°C, the speed of the coating machine is 35-45r/min, after 12-15 minutes, the material is discharged, and the product is obtained after cooling and drying at room temperature.