Slow-release drip irrigation diammonium water-soluble fertilizer composition and preparation method thereof

Abstract

The invention belongs to the technical field of water-soluble fertilizers, and particularly relates to a slow-release drip irrigation diammonium water-soluble fertilizer composition and a preparation method thereof. The slow-release drip irrigation diammonium water-soluble fertilizer composition comprises a water-soluble fertilizer and fermentation liquor, the water-soluble fertilizer comprises the following raw materials in parts by weight: 1-20 parts of a slow-release material, 1-5 parts of a surfactant, 5-30 parts of urea, 5-20 parts of ammonium sulfate, 30-55 parts of monoammonium phosphate, 1-5 parts of organic silicon, 1-5 parts of polyglutamic acid, 1-10 parts of an amino acid extracting solution, 1-5 parts of a polymer composite peptide protein solution, 1-3 parts of potassium fulvate raw powder, 1-3 parts of chitin raw powder and 1-3 parts of a urease inhibitor. The water-soluble fertilizer prepared by the invention is good in slow release effect, and can improve the yield and starch content of potatoes planted in aeolian sandy soil when being compounded with fermentation liquor for use.

Description

Technical Field

[0001] The invention belongs to the technical field of water-soluble fertilizers, and in particular relates to a slow-release drip irrigation diammonium water-soluble fertilizer composition and a preparation method thereof. Background Art

[0002] Aeolian sandy soil refers to a type of soil developed on aeolian sandy parent material. This type of soil is mainly composed of fine sand particles transported and deposited by wind. The main component of aeolian sandy soil is sand particles, usually with a particle size between 0.05 and 2 mm, loose texture, good air permeability and water permeability. Due to the lack of clay and organic matter, the aggregate structure of aeolian sandy soil is weak and easily blown away by the wind, leading to serious wind erosion problems. This type of soil usually lacks organic matter and nutrients, especially low levels of key nutrients such as nitrogen and phosphorus, and needs to be improved through fertilization or improvement. Due to its loose texture, aeolian sandy soil has poor water retention capacity and is prone to drought, which affects plant growth.

[0003] In recent years, more and more research has been devoted to improving sandy soil to improve its physical properties and increase its nutrient content, so as to better meet the growth needs of potatoes. Potatoes are still one of the main crops grown in this area. In the prior art, various methods are explored to improve sandy soil, aiming to optimize its physical structure and increase nutrient levels, so as to provide a more suitable growth environment for potatoes. For example, by adding polyaspartic acid, EDTA, and citric acid to water-soluble fertilizers, trace elements can be fixed and released slowly through complexation, but this method cannot complex macroelements such as nitrogen, phosphorus, potassium, and anions, resulting in that if the plant cannot absorb the water-soluble fertilizer in time after it is dissolved in water, the nutrients will seep into the ground or be fixed, which will not only cause fertilizer loss, but also pollute groundwater.

[0004] Therefore, there is an urgent need for a slow-release drip irrigation diammonium water-soluble fertilizer composition and a preparation method thereof. Summary of the invention

[0005] The invention aims to provide a slow-release drip irrigation diammonium water-soluble fertilizer composition and a preparation method thereof.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A slow-release diammonium phosphate water-soluble fertilizer composition for drip irrigation comprises a water-soluble fertilizer and a fermentation liquid. The water-soluble fertilizer comprises the following raw materials in parts by weight: 1-20 parts of a slow-release material, 1-5 parts of a surfactant, 5-30 parts of urea, 5-20 parts of ammonium sulfate, 30-55 parts of monoammonium phosphate, 1-5 parts of organosilicon, 1-5 parts of polyglutamic acid, 1-10 parts of an amino acid extract, 1-5 parts of a high-molecular composite peptide protein liquid, 1-3 parts of potassium humate powder, 1-3 parts of chitin powder and 1-3 parts of a urease inhibitor.

[0007] Furthermore, the sustained-release material comprises the following components in parts by weight: 1 to 3 parts of chitosan, 4 to 6 parts of gum arabic, 5 to 7 parts of polymaleic anhydride and 2 to 4 parts of carboxymethyl cellulose.

[0008] The slow-release material prepared by compounding multiple components of the present invention can improve the slow-release effect of water-soluble fertilizer. Chitosan has strong cationic properties and can adsorb anionic fertilizer components through electrostatic interaction, thereby delaying their release; at the same time, chitosan can form a thin film on the surface of fertilizer particles, which can control the diffusion rate of water and nutrients and prolong the release time of fertilizer. Gum arabic can increase the viscosity of the solution and form a stable colloidal system, which helps to wrap the fertilizer particles and control their release. Polymaleic anhydride can form stable complexes with various metal ions, and these complexes can slowly decompose in the soil to release nutrients; carboxymethyl cellulose has good water retention, can retain moisture in the soil, and promote the slow release of fertilizer. After these components are compounded in specific proportions, they work synergistically, can prolong the slow-release time, and improve the slow-release effect.

[0009] Furthermore, the surfactant is a water-soluble surfactant, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1: (1.2-1.5): (0.5-0.8).

[0010] Furthermore, the preparation method of the water-soluble surfactant comprises the following steps: S1: maleic anhydride and butylamine in a molar ratio of 1: (1.03-1.06) are mixed, the temperature is raised to 80-90°C, and the temperature is kept for 3-5 hours to obtain maleic acid monoamide; S2: Add sodium sulfite sulfonate to maleic acid monoamide, raise the temperature to 90-100°C, and react for 4-6 hours to obtain sodium sulfonate succinic acid monoamide; S3: Under nitrogen protection, add polyetheramine to sodium sulfonate succinic acid monoamide, raise the temperature to 185-195°C, continue the reaction for 5-7 hours, cool, and obtain a water-soluble surfactant.

[0011] Furthermore, the polyetheramine has a hydroxyl value of 54.5-57.5 mgKOH / g and is purchased from Wuhan Baiyite Chemical Co., Ltd.

[0012] Furthermore, the molar ratio of the sodium sulfite to maleic anhydride is (1.02-1.04):1.

[0013] Furthermore, the molar ratio of the polyetheramine to maleic anhydride is 1:1.

[0014] The surface tension of water-soluble fertilizer contributes to better solubility and leaf / root absorption. In order to enable the fertilizer solution to better cover the soil surface, the present invention attempts to add conventional surfactants to water-soluble fertilizers to improve surface tension, but the application effect is not good in sandy soil. The present invention can improve the surface tension of water-soluble fertilizers by compounding homemade surfactants and commercially available surfactants, so that the water-soluble fertilizers have better solubility and leaf / root absorption, which helps potatoes in sandy soil to absorb water-soluble fertilizers more effectively, thereby increasing yield.

[0015] The method for preparing the fermentation broth comprises the following steps: (1) mixing the residue of Fuke Qianjin Tablets and water in a weight ratio of 1:(10-12) to obtain a mixed liquid; (2) Adding complex enzyme to the mixed liquid, performing enzymolysis at 40-45°C for 6-8 hours, and obtaining enzymolysis products after inactivating the enzyme; (3) adding composite bacteria to the enzymatic hydrolyzate, performing anaerobically fermentation at 38-40°C for 20-24 hours, sterilizing, and obtaining a fermentation product; (4) The fermentation product is placed in a microwave reactor for microwave extraction, centrifuged, and the liquid is collected to obtain a fermentation broth.

[0016] Furthermore, the complex enzyme comprises cellulase, pectinase and bromelain; the amount of the cellulase in the mixed liquid is 100-110 U / mL; the amount of the pectinase in the mixed liquid is 120-130 U / mL; the amount of the bromelain in the mixed liquid is 80-90 U / mL.

[0017] Furthermore, the composite bacteria include Lactobacillus plantarum, Bifidobacterium longum and Lactobacillus bulgaricus.

[0018] Furthermore, the amount of the plant lactobacillus in the enzymatic hydrolysate is 10 8 ~10 9 CFU / mL; the amount of Bifidobacterium longum in the enzymatic hydrolysate was 10 7 ~10 8 CFU / mL; the amount of Lactobacillus bulgaricus in the enzymatic hydrolysate was 10 6 ~10 7 CFU / mL.

[0019] Furthermore, the conditions of microwave extraction are: microwave power 260~300W, temperature 60~65℃, and extraction time 1~2h.

[0020] Due to the bad soil conditions of windy sandy soil, it is not conducive to improving the quality of potato single tubers and affects the quality of potatoes. The present invention applies water-soluble fertilizer and fermentation liquid at the same time, which can improve the quality of potato single tubers. Analysis is that the combined use of water-soluble fertilizer and medicinal residue fermentation liquid realizes the complementarity of quick-acting nutrients and slow-release nutrients, ensures that potatoes can obtain sufficient and balanced nutrition throughout the growth period, and promotes the development and quality improvement of tubers. The combined effect of the two improves the physical and chemical properties and biological activity of the soil, provides a more suitable growth environment for potatoes, and promotes the development of the root system and the absorption of water and nutrients. The fermentation liquid of the present invention uses medicinal residues, and can also realize the reuse of waste resources.

[0021] Furthermore, every 666.67m 2 The amount of fermentation liquid for sandy soil is 3-5kg, and the amount of water-soluble fertilizer is 18~22kg.

[0022] The method for using the water-soluble fertilizer composition is to mix the water-soluble fertilizer and the fermentation liquid in a proportion and then apply the mixture.

[0023] During the test, it was found that the fermentation liquid prepared by the present invention using specific enzymes and bacteria and a surfactant in a specific ratio can improve the starch content in potatoes. The fermentation liquid prepared by using specific enzymes and bacteria contains rich nutrients, and the surfactant in a specific ratio can increase the absorption efficiency of these nutrients by the plant root system. Adequate nutrient supply and a good soil environment help to improve photosynthesis efficiency and promote the synthesis and accumulation of starch. Specific enzymes and bacteria can also enhance the activity of enzymes related to starch synthesis by promoting plant metabolic activities, thereby further increasing the starch content.

[0024] The present invention also provides a preparation method of a slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition, comprising the following steps: uniformly mixing raw materials of the water-soluble fertilizer to obtain the water-soluble fertilizer; and separately packaging the water-soluble fertilizer and fermentation material to obtain the slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition.

[0025] Compared with the prior art, the advantages and beneficial effects of the present invention are: 1. The present invention provides a slow-release drip irrigation diammonium water-soluble fertilizer composition, which has high utilization rate, less loss after application, long fertilizer effect, and can avoid the adverse effects of excessive local soil fertilizer concentration on crop growth in a short period of time, which not only improves economic benefits but also reduces pollution and is beneficial to protecting the ecological environment.

[0026] 2. The slow-release material prepared by compounding multiple components in the present invention can improve the slow-release effect of water-soluble fertilizer.

[0027] 3. The present invention can improve the surface tension of water-soluble fertilizer by compounding homemade surfactants and commercially available surfactants, which helps potatoes in sandy soil to absorb water-soluble fertilizer more effectively, thereby increasing yield.

[0028] 4. The present invention applies water-soluble fertilizer and fermentation liquid simultaneously, which can improve the quality of single potato tubers. The fermentation liquid of the present invention uses drug residues, and can also realize the recycling of waste resources.

[0029] 5. The present invention uses fermentation liquid prepared by specific enzymes and bacteria and surfactants in a specific ratio to improve the starch content in potatoes. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The raw materials used in the following examples of the present invention are all commercially available products: The Qianjin Tablets used in the present invention are decocted twice with hot water by Radix Angelicae Pubescentis, Radix Chrysanthemi Indici, Muscicapus ulmoides, Caulis Spatholobi and Radix Angelicae Pubescentis, and extracted twice by a method of extracting once every 2 hours, and the dregs obtained after filtering. The weight ratio of the five Chinese medicines in the Qianjin Tablets of the present invention is 16 parts of Radix Angelicae Pubescentis, 16 parts of Radix Chrysanthemi Indici, 16 parts of Muscicapus ulmoides, 16 parts of Caulis Spatholobi and 9 parts of Radix Angelicae Pubescentis; the above ratio is consistent with that recorded in the Pharmacopoeia, and is also consistent with the invention patent of application number CN98112696.0. Since the other three Chinese medicines are added after being powdered, Andrographis paniculata, Codonopsis pilosula and Radix Angelicae Sinensis are not included in the dregs.

[0032] The polyetheramine has a hydroxyl value of 54.5-57.5 mgKOH / g and is purchased from Wuhan Baiyite Chemical Co., Ltd.

[0033] Lactobacillus plantarum was purchased from China Center for Type Culture Collection, strain number: CCTCCAB2010210.

[0034] Lactobacillus bulgaricus was purchased from China Center for Type Culture Collection, strain number: CCTCCCB20082295.

[0035] Bifidobacterium longum was purchased from China Center for Type Culture Collection, strain number: CCTCCHB20082718.

[0036] Streptococcus thermophilus was purchased from China Center for Type Culture Collection, strain number: CCTCCAB2010206.

[0037] Lactobacillus helveticus was purchased from China Center for Type Culture Collection, strain number: CCTCCAB2010205.

[0038] Bifidobacterium lactis was purchased from Shanghai Microbiological Collection Center, strain number: SHBCCD24675.

[0039] Silicone, Anhui Mingyi Silicon Industry Co., Ltd., model MY2000.

[0040] Polyglutamic acid, Shandong Liyang Biotechnology Co., Ltd., model LY001.

[0041] Amino acid extract, Shandong Fuyite Agricultural Technology Co., Ltd., L-free amino acid, amino acid ≥ 200g / L.

[0042] High molecular weight composite peptide protein liquid, Henan Hansen Agricultural Technology Co., Ltd., Bige, high molecular weight composite peptide organic protein liquid fertilizer for leafy vegetables.

[0043] Potassium humate powder, Shanxi Jiayou Humic Acid Technology Co., Ltd.

[0044] Chitosan powder, Shanghai Jijing Biotechnology Co., Ltd.

[0045] Urease inhibitor, n-butylthiophosphoric acid triamide, Hubei Shineng Chemical Technology Co., Ltd.

[0046] The enzymes used were purchased from Shanghai Yuanye Biotechnology Co., Ltd.

[0047] Chitosan, Xi'an Jinxiang Pharmaceutical Excipients Co., Ltd.

[0048] Gum Arabic, Zhejiang Yicun Biotechnology Co., Ltd.

[0049] Polymaleic anhydride, CAS registration number 26099~09~02, Shandong Wanhua Tianhe New Materials Co., Ltd.

[0050] Carboxymethyl cellulose, Jinan Duanxing Chemical Technology Co., Ltd.

[0051] Sodium lignin sulfonate, Donghao Chemical (Shandong) Co., Ltd.

[0052] Fatty alcohol polyoxyethylene ether, AEO~3, Hai'an Petrochemical Plant, Jiangsu Province.

[0053] Triethanolamine sulfonate, Dongying Xinwang Chemical Co., Ltd. Example

[0054] The present embodiment provides a slow-release drip irrigation diammonium water-soluble fertilizer composition, including a water-soluble fertilizer and a fermentation liquid. The water-soluble fertilizer includes the following raw materials in parts by weight: 10 parts of slow-release material, 3 parts of surfactant, 15 parts of urea, 12 parts of ammonium sulfate, 42 parts of monoammonium phosphate, 3 parts of organosilicon, 3 parts of polyglutamic acid, 7 parts of amino acid extract, 3 parts of high molecular weight composite peptide protein liquid, 2 parts of potassium humate powder, 2 parts of chitin powder and 2 parts of urease inhibitor.

[0055] The sustained-release material comprises the following components in parts by weight: 2 parts of chitosan, 5 parts of gum arabic, 6 parts of polymaleic anhydride and 3 parts of carboxymethyl cellulose.

[0056] The surfactant is a water-soluble surfactant, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1:1.3:0.6.

[0057] The preparation method of the water-soluble surfactant comprises the following steps: S1: maleic anhydride and butylamine in a molar ratio of 1:1.05 are mixed, the temperature is raised to 85°C, and the temperature is kept for 4 hours to obtain maleic acid monoamide; S2: adding sodium sulfite sulfonate to maleic acid monoamide, wherein the molar ratio of sodium sulfite sulfonate to maleic anhydride is 1.03:1; heating to 95° C. and reacting for 5 hours to obtain sodium sulfonate succinic acid monoamide; S3: Under nitrogen protection, polyetheramine was added to sodium sulfonate succinic acid monoamide, wherein the hydroxyl value of the polyetheramine was 54.5-57.5 mgKOH / g (purchased from Wuhan Baiyite Chemical Co., Ltd.); the molar ratio of the polyetheramine to maleic anhydride was 1:1, the temperature was raised to 190°C, the reaction was continued for 6 hours, and the reaction was cooled to obtain a water-soluble surfactant.

[0058] The method for preparing the fermentation broth comprises the following steps: (1) mixing the residue of Fuke Qianjin Tablets and water in a weight ratio of 1:11 to obtain a mixed liquid; (2) adding a composite enzyme to the mixed liquid, performing enzymolysis at 42° C. for 7 h, and obtaining an enzymolysis product after inactivating the enzyme; the composite enzyme comprises cellulase, pectinase and bromelain; the amount of the cellulase in the mixed liquid is 105 U / mL; the amount of the pectinase in the mixed liquid is 125 U / mL; and the amount of the bromelain in the mixed liquid is 85 U / mL.

[0059] (3) Adding composite bacteria to the enzymatic hydrolysate, anaerobic fermentation at 38°C for 22 hours, sterilization, and obtaining a fermentation product; the composite bacteria include Lactobacillus plantarum, Bifidobacterium longum and Lactobacillus bulgaricus. The amount of Lactobacillus plantarum in the enzymatic hydrolysate is 10 9 CFU / mL; the amount of Bifidobacterium longum in the enzymatic hydrolysate was 10 8 CFU / mL; the amount of Lactobacillus bulgaricus in the enzymatic hydrolysate was 10 6 CFU / mL.

[0060] (4) The fermentation product was placed in a microwave reactor for microwave extraction. The microwave extraction conditions were as follows: microwave power 280 W, temperature 62 °C, and extraction time 1.5 h. Centrifugation was performed and the liquid was collected to obtain the fermentation broth.

[0061] The preparation method of the slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition comprises the following steps: uniformly mixing raw materials of the water-soluble fertilizer to obtain the water-soluble fertilizer; and separately packaging the water-soluble fertilizer and the fermentation material to obtain the slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition. Example

[0062] The present embodiment provides a slow-release drip irrigation diammonium water-soluble fertilizer composition, including a water-soluble fertilizer and a fermentation liquid. The water-soluble fertilizer includes the following raw materials in parts by weight: 5 parts of slow-release material, 2 parts of surfactant, 7 parts of urea, 9 parts of ammonium sulfate, 30 parts of monoammonium phosphate, 5 parts of silicone, 1 part of polyglutamic acid, 10 parts of amino acid extract, 1 part of high molecular weight composite peptide protein liquid, 3 parts of potassium humate powder, 1 part of chitin powder and 3 parts of urease inhibitor.

[0063] The sustained-release material comprises the following components in parts by weight: 1 part of chitosan, 6 parts of gum arabic, 5 parts of polymaleic anhydride and 4 parts of carboxymethyl cellulose.

[0064] The surfactant is a water-soluble surfactant, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1:1.2:0.5.

[0065] The preparation method of the water-soluble surfactant comprises the following steps: S1: maleic anhydride and butylamine in a molar ratio of 1:1.03 are mixed, the temperature is raised to 80°C, and the temperature is kept for 5 hours to obtain maleic acid monoamide; S2: adding sodium sulfite sulfonate to maleic acid monoamide, wherein the molar ratio of sodium sulfite sulfonate to maleic anhydride is 1.02:1; heating to 90° C. and reacting for 6 hours to obtain sodium sulfonate succinic acid monoamide; S3: under nitrogen protection, polyetheramine was added to sodium sulfonate succinic acid monoamide, wherein the molar ratio of the polyetheramine to maleic anhydride was 1:1, the temperature was raised to 185° C., the reaction was continued for 7 hours, and the reaction was cooled to obtain a water-soluble surfactant.

[0066] The method for preparing the fermentation broth comprises the following steps: (1) mixing the residue of Fuke Qianjin Tablets and water in a weight ratio of 1:10 to obtain a mixed liquid; (2) adding a composite enzyme to the mixed liquid, performing enzymolysis at 40° C. for 8 h, and obtaining an enzymolysis product after inactivating the enzyme; the composite enzyme comprises cellulase, pectinase and bromelain; the amount of the cellulase in the mixed liquid is 100 U / mL; the amount of the pectinase in the mixed liquid is 130 U / mL; and the amount of the bromelain in the mixed liquid is 80 U / mL.

[0067] (3) Adding composite bacteria to the enzymatic hydrolysate, anaerobic fermentation at 40°C for 24 hours, sterilization, and obtaining a fermentation product; the composite bacteria include Lactobacillus plantarum, Bifidobacterium longum and Lactobacillus bulgaricus. The amount of Lactobacillus plantarum in the enzymatic hydrolysate is 10 8 CFU / mL; the amount of Bifidobacterium longum in the enzymatic hydrolysate was 10 8 CFU / mL; the amount of Lactobacillus bulgaricus in the enzymatic hydrolysate was 10 7 CFU / mL.

[0068] (4) The fermentation product was placed in a microwave reactor for microwave extraction. The microwave extraction conditions were as follows: microwave power 260 W, temperature 65 °C, and extraction time 1 h. Centrifugation was performed and the liquid was collected to obtain the fermentation broth.

[0069] The preparation method of the slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition comprises the following steps: uniformly mixing raw materials of the water-soluble fertilizer to obtain the water-soluble fertilizer; and separately packaging the water-soluble fertilizer and the fermentation material to obtain the slow-release drip irrigation diammonium phosphate water-soluble fertilizer composition.

[0070] Comparative Example 1 The difference between this comparative example and Example 1 is that the sustained-release material comprises the following components in parts by weight: 5 parts of chitosan, 2 parts of gum arabic, 3 parts of polymaleic anhydride and 6 parts of carboxymethyl cellulose.

[0071] Comparative Example 2 The difference between this comparative example and Example 1 is that the surfactant is a water-soluble surfactant, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1:1:1. The preparation method of the water-soluble surfactant is the same as that of Example 1.

[0072] Comparative Example 3 The difference between this comparative example and Example 1 is that the surfactant is a water-soluble surfactant, a fatty alcohol polyoxyethylene ether and triethanolamine sulfonate in a weight ratio of 1:1.3:0.6. The preparation method of the water-soluble surfactant is the same as that of Example 1.

[0073] Comparative Example 4 The difference between this comparative example and Example 1 is that the surfactant is octadecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1:1.3:0.6.

[0074] Comparative Example 5 The difference between this comparative example and Example 1 is that the complex enzyme includes neutral protease, pectinase and ficin; the amount of the neutral protease in the mixed liquid is 105 U / mL; the amount of the pectinase in the mixed liquid is 125 U / mL; the amount of the ficin in the mixed liquid is 85 U / mL.

[0075] Comparative Example 6 The difference between this comparative example and Example 1 is that the composite bacteria include thermophilic streptococcus, helveticus lactis and bifidobacterium lactis. The amount of thermophilic streptococcus in the enzymatic hydrolysate is 10 9 CFU / mL; the amount of Lactobacillus helveticus in the enzymatic hydrolysate was 10 8 CFU / mL; the amount of Bifidobacterium lactis in the enzymatic hydrolysate was 10 6 CFU / mL.

[0076] Performance Testing 1. The surface tension of the water-soluble fertilizer (excluding the fermentation liquid) in the water-soluble fertilizer compositions prepared in Examples 1 to 2 and Comparative Examples 1 to 6 was measured using the Wilhelmy plate method.

[0077] 2. Referring to the requirements of GB / T23348-2009, the slow-release performance of the water-soluble fertilizer (excluding the fermentation liquid) in the water-soluble fertilizer compositions prepared in Examples 1 to 2 and Comparative Examples 1 to 6 was tested by the 25°C static water dissolution rate method. When the cumulative dissolution rate of nitrogen reached 80% of the total nitrogen content, sampling was stopped and the time was recorded.

[0078] The results are shown in Table 1.

[0079] Table 1 Performance test results

[0080] 2. Actual planting performance verification Potato variety: Favorita, test site location: Shenmu City, Shaanxi Province.

[0081] The basic information of the test site is shown in Table 2.

[0082] Table 2 Soil types and physical and chemical properties

[0083] Treatment method: On the basis of conventional fertilization (50 kg per mu, Guangxi Zhuangfang Liyuan Biotechnology Co., Ltd. (15~5~5), drip irrigation of the water-soluble fertilizer composition of the present invention was carried out during the clustering stage and tuber expansion stage, and drip irrigation was carried out twice in total, each time every 666.67m 2 The amount of fermentation liquid for sandy soil is 4kg, the amount of water-soluble fertilizer is 20kg, and the concentration of watering is 120 times. The method of using the water-soluble fertilizer composition is to mix the water-soluble fertilizer and fermentation liquid in proportion and then apply. The control group is conventional fertilization. Each treatment of the experiment is repeated 3 times, the area of ​​the plot is 35㎡, randomly arranged, and a protection row is set.

[0084] The results are shown in Table 3.

[0085] Table 3 Effects of different treatments on potato yield

[0086] From the above performance test results, it can be seen that the water-soluble fertilizers of Examples 1 and 2 have high surface tension and good slow-release effect, and the water-soluble fertilizer composition can increase the yield and starch content of potatoes. In particular, the comprehensive performance of Example 1 is the most outstanding, which is mainly due to the synergistic effect of the water-soluble fertilizer and the fermentation liquid.

[0087] However, the comparative examples are obviously inferior to the embodiments in the corresponding performance tests because they do not adopt the necessary technical solutions. The composition of the slow-release material in comparative example 1 is different, and the slow-release effect of the water-soluble fertilizer decreases. The compositions of the surfactants in comparative examples 2 to 4 are different, the surface tension of the water-soluble fertilizer decreases, the potato yield decreases, and the starch content in the potatoes decreases. The complex enzymes used to prepare the fermentation liquid in comparative example 5 are different, and the strains in comparative example 6 are different, and the quality of the single potato tuber decreases. At the same time, the starch content in the potatoes decreases. The above experimental results further prove the importance of the technical solution defined in the present invention for its technical effects.

[0088] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A slow-release drip irrigation diammonium water-soluble fertilizer composition, characterized in that: It comprises a water-soluble fertilizer and a fermentation liquid, wherein the water-soluble fertilizer comprises the following raw materials in parts by weight: 1-20 parts of a slow-release material, 1-5 parts of a surfactant, 5-30 parts of urea, 5-20 parts of ammonium sulfate, 30-55 parts of monoammonium phosphate, 1-5 parts of organosilicon, 1-5 parts of polyglutamic acid, 1-10 parts of an amino acid extract, 1-5 parts of a polymer composite peptide protein liquid, 1-3 parts of potassium humate powder, 1-3 parts of chitin powder and 1-3 parts of a urease inhibitor; The method for preparing the fermentation broth comprises the following steps: (1) mixing the residue of Fuke Qianjin Tablets and water in a weight ratio of 1:(10-12) to obtain a mixed liquid; (2) Adding complex enzyme to the mixed liquid, performing enzymolysis at 40-45°C for 6-8 hours, and obtaining enzymolysis products after inactivating the enzyme; (3) adding composite bacteria to the enzymatic hydrolyzate, performing anaerobically fermentation at 38-40°C for 20-24 hours, sterilizing, and obtaining a fermentation product; (4) The fermentation product is placed in a microwave reactor for microwave extraction, centrifuged, and the liquid is collected to obtain a fermentation broth.

2. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: The complex enzyme comprises cellulase, pectinase and bromelain; the amount of the cellulase in the mixed liquid is 100-110 U / mL; the amount of the pectinase in the mixed liquid is 120-130 U / mL; and the amount of the bromelain in the mixed liquid is 80-90 U / mL.

3. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: The composite bacteria include Lactobacillus plantarum, Bifidobacterium longum and Lactobacillus bulgaricus.

4. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 3, characterized in that: The amount of plant lactobacillus in the enzymatic hydrolysate is 10 8 ~10 9 CFU / mL; the amount of Bifidobacterium longum in the enzymatic hydrolysate was 10 7 ~10 8 CFU / mL; the amount of Lactobacillus bulgaricus in the enzymatic hydrolysate was 10 6 ~10 7 CFU / mL.

5. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: The conditions of microwave extraction are: microwave power 260~300W, temperature 60~65℃, and extraction time 1~2h.

6. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: The sustained-release material comprises the following components in parts by weight: 1 to 3 parts of chitosan, 4 to 6 parts of gum arabic, 5 to 7 parts of polymaleic anhydride and 2 to 4 parts of carboxymethyl cellulose.

7. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: The surfactant is a water-soluble surfactant, hexadecyltrimethylammonium chloride and sodium lignin sulfonate in a weight ratio of 1: (1.2-1.5): (0.5-0.8); The preparation method of the water-soluble surfactant comprises the following steps: S1: maleic anhydride and butylamine in a molar ratio of 1: (1.03-1.06) are mixed, the temperature is raised to 80-90°C, and the temperature is kept for 3-5 hours to obtain maleic acid monoamide; S2: adding sodium sulfite sulfonate to maleic acid monoamide, raising the temperature to 90-100° C., and reacting for 4-6 hours to obtain sodium sulfonate succinic acid monoamide; S3: Under nitrogen protection, add polyetheramine to sodium sulfonate succinic acid monoamide, raise the temperature to 185-195°C, react for 5-7 hours, cool, and obtain a water-soluble surfactant.

8. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 7, characterized in that: The hydroxyl value of the polyetheramine is 54.5-57.5 mgKOH / g.

9. The slow-release drip irrigation diammonium water-soluble fertilizer composition according to claim 1, characterized in that: Every 666.67m 2 The amount of fermentation liquid for sandy soil is 3-5kg, and the amount of water-soluble fertilizer is 18~22kg.

10. The method for preparing the slow-release drip irrigation diammonium water-soluble fertilizer composition according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing raw materials of water-soluble fertilizer evenly to obtain water-soluble fertilizer; and packaging the water-soluble fertilizer and fermented material separately to obtain a slow-release drip irrigation diammonium water-soluble fertilizer composition.

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