Composite macroelement water-soluble fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of water-soluble fertilizers, in particular to a composite macroelement water-soluble fertilizer and a preparation method of the composite macroelement water-soluble fertilizer. Comprising the following components in parts by mass: 15-20 parts of a water-soluble nitrogen fertilizer, 25-40 parts of a water-soluble potassium fertilizer, 17-22 parts of a water-soluble phosphate fertilizer, 7-15 parts of a medium element nutritional agent, 0.2-0.8 part of a trace element nutritional agent, 8-12 parts of a nutrition enhancer, 3-9 parts of a chelating agent, 0.3-1 part of a chelating aid and 0.1-0.5 part of a wetting agent. The compound macroelement water-soluble fertilizer provided by the invention can effectively improve the utilization rate of nutrients and improve the yield and quality of crops.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water-soluble fertilizer, and particularly relates to a composite macroelement water-soluble fertilizer and a preparation method thereof. BACKGROUND

[0002] The water-soluble fertilizer is a multi-element compound fertilizer which can be completely dissolved in water, can be quickly dissolved in water, is easy to be absorbed by crops, and has a relatively high nutrient absorption and utilization rate, and can be applied to facility agriculture such as sprinkling irrigation and drip irrigation to realize water and fertilizer integration, achieve water saving, fertilizer saving, labor saving and yield increase. The water-soluble fertilizer has the advantages of good water solubility, few impurities, low conductivity, convenient concentration adjustment, fast fertilizer effect, high crop absorption rate, simple fertilization, low risk of seedling burning and strong applicability, and is one of important directions of future fertilizer development; the macroelement refers to an essential nutrient element required for normal growth and development of plants or having a relatively large content, nitrogen, phosphorus and potassium; the composite water-soluble fertilizer adds one or more of medium elements (calcium, magnesium, etc.) and trace elements (iron, manganese, zinc, etc.) on the basis of the macroelement, and / or adds a functional substance, and a design target thereof is to provide more comprehensive and balanced nutrition and has a specific physiological regulation or soil improvement function. However, the preparation process of the existing water-soluble powder fertilizer is complicated, the combination state of the macroelement and the trace element in the composite water-soluble fertilizer prepared by the preparation process is poor, the use effect of the water-soluble fertilizer is affected, the function and efficacy of the water-soluble fertilizer are single, and the water-soluble fertilizer cannot better meet the needs of crop growth, and therefore, it is necessary to provide a composite macroelement water-soluble fertilizer and a preparation method thereof to solve the above technical problems. SUMMARY

[0003] The application aims to provide a composite macroelement water-soluble fertilizer and a preparation method thereof to solve the problems in the prior art.

[0004] To achieve the above object, the application adopts the following technical scheme: a composite macroelement water-soluble fertilizer, characterized by comprising the following components in mass fraction: 15-20 parts of water-soluble nitrogen fertilizer, 25-40 parts of water-soluble potassium fertilizer, 17-22 parts of water-soluble phosphorus fertilizer, 7-15 parts of medium element nutrient agent, 0.2-0.8 parts of trace element nutrient agent, 8-12 parts of nutrient enhancer, 3-9 parts of chelating agent, 0.3-1 part of chelating auxiliary agent and 0.1-0.5 part of wetting agent.

[0005] Further, the water-soluble nitrogen fertilizer is urea, the water-soluble potassium fertilizer is potassium sulfate, and the water-soluble phosphorus fertilizer is monoammonium phosphate.

[0006] Further, the medium element nutrient agent is a mixture of calcium chloride and magnesium sulfate, and the mass ratio of the calcium chloride to the magnesium sulfate is 7:3.

[0007] Further, the trace element nutrient agent is a mixture of ferrous sulfate, zinc sulfate, boric acid and manganese sulfate, wherein the mass ratio of the ferrous sulfate, zinc sulfate, boric acid and manganese sulfate is 15:4:1:1.

[0008] Further, the nutrient enhancer is alginic acid, glycyrrhiza polysaccharide, marigold extract and perilla leaf extract with a mass ratio of 5:1:1:1.

[0009] Further, the chelating agent is iminodisuccinic acid, and the chelating auxiliary agent is citric acid.

[0010] Further, the wetting agent is alkyl polyglycoside (for example, APG-1214).

[0011] A preparation method of a composite macronutrient water-soluble fertilizer, wherein a nutrient enhancer, a chelating agent, a chelating auxiliary agent and a wetting agent are added to 200 parts of water, stirred until fully dissolved, concentrated, dried, pulverized, and then granulated, and then water-soluble nitrogen fertilizer, water-soluble potassium fertilizer, water-soluble phosphorus fertilizer, medium element nutrient agent and trace element nutrient agent are added, and then fully mixed to obtain the composite macronutrient water-soluble fertilizer.

[0012] The present application has the following beneficial effects: according to the growth characteristics of crops, the present application optimizes the ratio of macronutrients, medium elements and trace elements, and the prepared composite powder water-soluble fertilizer contains the required macronutrients of plants, medium or trace elements such as calcium, iron, zinc and boron, and the nutrient balance of the composite macronutrient water-soluble fertilizer can meet the requirements of crop growth, effectively improve the nutrient utilization rate, and improve the yield and quality of crops; at the same time, the present application optimizes the efficient chelating agent which is environmentally friendly and can be quickly degraded, effectively reduces the amount of chemicals, and can be quickly and completely degraded in the natural environment, greatly reduces the persistent residue risk of the chelating agent in the environment, and significantly improves the environmental safety during use and subsequent disposal. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0014] Embodiment 1 The nutrient enhancer 8 (alginic acid, glycyrrhiza polysaccharide, marigold extract, perilla leaf extract in a mass ratio of 5:1:1:1), imino disuccinic acid 6, citric acid 0.5, alkyl polyglycoside 0.3 are added into 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, granulated, then urea 18, potassium sulfate 35, monoammonium phosphate 20, medium element nutrient agent (calcium chloride and magnesium sulfate are mixed in a mass ratio of 7:3) 10, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, manganese sulfate are mixed in a mass ratio of 15:4:1:1) 0.4 are added, fully mixed to obtain the compound type macronutrient water-soluble fertilizer.

[0015] Example 2 The nutrient enhancer 8 (alginic acid, glycyrrhiza polysaccharide, marigold extract, perilla leaf extract in a mass ratio of 5:1:1:1), imino disuccinic acid 3, citric acid 0.3, alkyl polyglycoside 0.1 are added into 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, granulated, then urea 15, potassium sulfate 25, monoammonium phosphate 17, medium element nutrient agent (calcium chloride and magnesium sulfate are mixed in a mass ratio of 7:3) 7, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, manganese sulfate are mixed in a mass ratio of 15:4:1:1) 0.2 are added, fully mixed to obtain the compound type macronutrient water-soluble fertilizer.

[0016] Example 3 The nutrient enhancer 12 (alginic acid, glycyrrhiza polysaccharide, marigold extract, perilla leaf extract in a mass ratio of 5:1:1:1), imino disuccinic acid 9, citric acid 1, alkyl polyglycoside 0.5 are added into 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, granulated, then urea 20, potassium sulfate 40, monoammonium phosphate 22, medium element nutrient agent (calcium chloride and magnesium sulfate are mixed in a mass ratio of 7:3) 15, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, manganese sulfate are mixed in a mass ratio of 15:4:1:1) 0.8 are added, fully mixed to obtain the compound type macronutrient water-soluble fertilizer.

[0017] Example 4 The nutrient enhancer 10 (alginic acid, glycyrrhiza polysaccharide, marigold extract, perilla leaf extract in a mass ratio of 5:1:1:1), imino disuccinic acid 5, citric acid 0.8, alkyl polyglycoside 0.4 are added into 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, granulated, then urea 16, potassium sulfate 30, monoammonium phosphate 18, medium element nutrient agent (calcium chloride and magnesium sulfate are mixed in a mass ratio of 7:3) 12, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, manganese sulfate are mixed in a mass ratio of 15:4:1:1) 0.6 are added, fully mixed to obtain the compound type macronutrient water-soluble fertilizer.

[0018] Comparative Example 1 Urea 18 parts, potassium sulfate 35 parts, monoammonium phosphate 20 parts were added to 200 parts of water, stirred to fully dissolve, and then concentrated, dried, crushed, and granulated to obtain the water-soluble fertilizer of Comparative Example 1.

[0019] Comparative Example 2 Nutrient enhancer 12 parts (mass ratio of 5:1:1:1 of alginic acid, glycyrrhizin, marigold extract, and perilla leaf extract), disodium ethylenediaminetetraacetate 10 parts, and alkyl polyglycoside 0.5 part were added to 200 parts of water, stirred to fully dissolve, and then concentrated, dried, crushed, and granulated. Urea 20 parts, potassium sulfate 40 parts, monoammonium phosphate 22 parts, medium element nutrient agent (calcium chloride and magnesium sulfate mixed at a mass ratio of 7:3) 15 parts, and trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate mixed at a mass ratio of 15:4:1:1) 0.8 part were added, and then fully mixed to obtain the water-soluble fertilizer of Comparative Example 2.

[0020] Comparative Example 3 Iminodisuccinic acid 9 parts, citric acid 1 part, and alkyl polyglycoside 0.5 part were added to 200 parts of water, stirred to fully dissolve, and then concentrated, dried, crushed, and granulated. Urea 20 parts, potassium sulfate 40 parts, monoammonium phosphate 22 parts, medium element nutrient agent (calcium chloride and magnesium sulfate mixed at a mass ratio of 7:3) 15 parts, and trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate mixed at a mass ratio of 15:4:1:1) 0.8 part were added, and then fully mixed to obtain the water-soluble fertilizer of Comparative Example 3.

[0021] Comparative Example 4 Alginic acid 12 parts, iminodisuccinic acid 9 parts, citric acid 1 part, and alkyl polyglycoside 0.5 part were added to 200 parts of water, stirred to fully dissolve, and then concentrated, dried, crushed, and granulated. Urea 20 parts, potassium sulfate 40 parts, monoammonium phosphate 22 parts, medium element nutrient agent (calcium chloride and magnesium sulfate mixed at a mass ratio of 7:3) 15 parts, and trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate mixed at a mass ratio of 15:4:1:1) 0.8 part were added, and then fully mixed to obtain the water-soluble fertilizer of Comparative Example 4.

[0022] Comparative Example 5 The nutrient enhancer 12 (alginic acid, marigold extract, perilla leaf extract at a mass ratio of 5:1:1) 12 parts, imino disuccinic acid 9 parts, citric acid 1 part, alkyl polyglycoside 0.5 parts, are added to 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, and granulated, then urea 20 parts, potassium sulfate 40 parts, monoammonium phosphate 22 parts, medium element nutrient agent (calcium chloride and magnesium sulfate mixed at a mass ratio of 7:3) 15 parts, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate mixed at a mass ratio of 15:4:1:1) 0.8 parts are added, and then fully mixed to obtain the water-soluble fertilizer of Comparative Example 5.

[0023] Comparative Example 6 The nutrient enhancer 12 (alginic acid, glycyrrhiza polysaccharide) 12 parts, imino disuccinic acid 9 parts, citric acid 1 part, alkyl polyglycoside 0.5 parts, are added to 200 parts of water, stirred to fully dissolve, concentrated, dried, crushed, and granulated, then urea 20 parts, potassium sulfate 40 parts, monoammonium phosphate 22 parts, medium element nutrient agent (calcium chloride and magnesium sulfate mixed at a mass ratio of 7:3) 15 parts, trace element nutrient agent (ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate mixed at a mass ratio of 15:4:1:1) 0.8 parts are added, and then fully mixed to obtain the water-soluble fertilizer of Comparative Example 6.

[0024] Test Example The comparative test was carried out in a cooperative tomato yield planting base, and the test variety was “Fengguan”. The test adopted a randomized block arrangement test design, and four treatment groups were set to apply the fertilizers of Examples 1-4 at 25 kg / acre. Three control groups were set, and the control group 1 applied the fertilizer of Comparative Example 1 at 25 kg / acre, the control group 2 applied the fertilizer of Comparative Example 2 at 25 kg / acre, the control group 3 applied the fertilizer of Comparative Example 3 at 25 kg / acre, the control group 4 applied the fertilizer of Comparative Example 4 at 25 kg / acre, the control group 5 applied the fertilizer of Comparative Example 5 at 25 kg / acre, and the control group 6 applied the fertilizer of Comparative Example 6 at 25 kg / acre. The other agronomic measures of each group were completely the same. Each group had three repetitions, and the results were averaged. The specific parameters are shown in Table 1. The vitamin C in Table 1 was determined according to the first method specified in GB 5009.86-2016; The lycopene was determined according to NY / T 1651-2008 “Determination of Lycopene in Vegetables and Products by High Performance Liquid Chromatography”. The soluble sugar was determined according to NY / T 1278-2007 “Determination of Soluble Sugar in Vegetables and Products by Copper Reduction Iodine Method”.

[0025] It can be known from the results of the test examples that the composite macroelement water-soluble fertilizer of the embodiments 1-4 can effectively improve the yield and quality of tomatoes, and the effect is better than that of the comparative examples 1-6.

[0026] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any skilled person in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical range disclosed by the present application, or make equivalent replacement to some technical features thereof. The modification, change or replacement does not make the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application.

Claims

1. A compound water-soluble fertilizer containing macro-elements, characterized in that, It includes the following components in parts by weight: 15-20 parts water-soluble nitrogen fertilizer, 25-40 parts water-soluble potassium fertilizer, 17-22 parts water-soluble phosphate fertilizer, 7-15 parts medium-element nutrients, 0.2-0.8 parts micro-element nutrients, 8-12 parts nutrient fortifier, 3-9 parts chelating agent, 0.3-1 part chelating aid, and 0.1-0.5 parts wetting agent.

2. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The water-soluble nitrogen fertilizer is urea, the water-soluble potassium fertilizer is potassium sulfate, and the water-soluble phosphate fertilizer is monoammonium phosphate.

3. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The medium-element nutrient is a mixture of calcium chloride and magnesium sulfate, wherein the mass ratio of calcium chloride to magnesium sulfate is 7:

3.

4. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The trace element nutrient is a mixture of ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate, wherein the mass ratio of ferrous sulfate, zinc sulfate, boric acid, and manganese sulfate is 15:4:1:

1.

5. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The nutritional fortifier consists of alginic acid, licorice polysaccharide, marigold extract, and perilla leaf extract in a mass ratio of 5:1:1:

1.

6. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The chelating agent is iminodisuccinic acid, and the chelating aid is citric acid.

7. The compound water-soluble fertilizer containing macro-elements as described in claim 1, characterized in that, The wetting agent is an alkyl polysaccharide glycoside.

8. A method for preparing a compound macro-element water-soluble fertilizer according to any one of claims 1-7, characterized in that: Nutrient fortifier, chelating agent, chelating aid and wetting agent are added to 200 parts of water and stirred until fully dissolved. After concentration, drying, crushing and granulation, water-soluble nitrogen fertilizer, water-soluble potassium fertilizer, water-soluble phosphorus fertilizer, medium element nutrients and micro element nutrients are added and mixed thoroughly to obtain compound macro-element water-soluble fertilizer.

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