Organic water-soluble fertilizer as well as preparation method and application thereof

Abstract

The invention provides an organic water-soluble fertilizer as well as a preparation method and application thereof. The organic water-soluble fertilizer comprises the following components: ammonium sulfate waste liquid, compost fermentation waste liquid, an organic nutritional supplement and a nano microelement synergist, the organic nutritional supplement comprises any one or a combination of at least two of fulvic acid, spermidine, chitin or algin; the nano microelement synergist comprises any one or a combination of at least two of nano molybdenum oxide, nano nickel oxide, nano selenium oxide, nano boron oxide or nano manganese oxide. According to the method, the ammonium sulfate waste liquid and the compost fermentation waste liquid are reused for production of the agricultural fertilizer for the first time, the green and environment-friendly organic water-soluble fertilizer is prepared in combination with the organic nutritional supplement and the nano microelement synergist, and resource utilization of the ammonium sulfate waste liquid and the compost fermentation waste liquid is achieved; the product effectively improves physical, chemical and biological properties of soil, improves soil nutrients, promotes crop growth and improves crop yield.

Description

Technical Field

[0001] This invention belongs to the field of soil improvement technology, specifically relating to an organic water-soluble fertilizer, its preparation method, and its application. Background Technology

[0002] The large-scale production and use of chemical fertilizers and pesticides in agricultural production have enabled rapid agricultural development, meeting the needs for food supply and a large amount of other resources. However, soil problems are becoming increasingly prominent, becoming a significant factor affecting agricultural production and limiting sustainable agricultural development.

[0003] Industrial sectors such as chemical production and semiconductor manufacturing generate large quantities of ammonium sulfate waste liquid, which includes byproducts or waste products from industrial processes. Under certain conditions, ammonium sulfate decomposes to produce harmful substances such as ammonia. Direct discharge of untreated ammonium sulfate waste liquid will pollute water bodies and soil, and the volatilization of ammonia will also have a negative impact on the atmospheric environment.

[0004] The composting and fermentation process of organic waste generates a large amount of fermentation waste liquid, which also contains some soluble carbohydrates, proteins and fatty acids. However, current technologies are often based on solid compost fermentation products, and the compost fermentation waste liquid has not been properly recycled and utilized.

[0005] Therefore, it is necessary to develop a compound organic water-soluble fertilizer to rationally recycle and utilize ammonium sulfate waste liquid and compost fermentation waste liquid, realize the value-added utilization of waste resources, provide high-quality agricultural production fertilizer, and provide strong support for stable agricultural production and supply and green high-quality development. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide an organic water-soluble fertilizer, its preparation method and application. The organic water-soluble fertilizer provided by this invention can effectively improve the physical, chemical and biological properties of soil, increase soil nutrients, promote crop growth and increase crop yield.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides an organic water-soluble fertilizer, wherein the components of the organic water-soluble fertilizer include ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist;

[0009] The organic nutritional supplement includes any one or a combination of at least two of fulvic acid, spermidine, chitin, or phycocyanin.

[0010] The nano-trace element synergist includes any one or a combination of at least two of nano-molybdenum oxide, nano-nickel oxide, nano-selenium oxide, nano-boron oxide, or nano-manganese oxide.

[0011] This invention is the first to reuse ammonium sulfate waste liquid and compost fermentation waste liquid in the production of agricultural fertilizers. By combining organic nutrient supplements and nano-trace element synergists, a green and environmentally friendly organic water-soluble fertilizer is prepared, realizing the resource utilization of ammonium sulfate waste liquid and compost fermentation waste liquid. The organic water-soluble fertilizer provided by this invention can effectively improve the physical, chemical, and biological properties of soil, increase soil nutrients, promote crop growth, and increase crop yield.

[0012] In this invention, ammonium sulfate waste liquid and compost fermentation waste liquid have a synergistic effect, which can increase the organic matter content of the soil, improve the aggregate structure, enhance the air permeability and water retention, and maintain the soil micro-ecological balance.

[0013] In this invention, the organic nutrient supplement and the nano-trace element enhancer have a synergistic effect, providing crops with sufficient nutrients, replenishing soil trace elements, and improving the soil's acid-base buffering capacity.

[0014] Preferably, the organic water-soluble fertilizer comprises, by weight, 10-20 parts ammonium sulfate waste liquid, 30-45 parts compost fermentation waste liquid, 25-35 parts organic nutrient supplement, and 0.1-10 parts nano-trace element synergist.

[0015] The weight percentage of the ammonium sulfate waste liquid can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 parts, etc.

[0016] The weight percentages of the composting fermentation waste liquid can be 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, or 45 parts, etc.

[0017] The organic nutritional supplement may be available in portions of 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, or 35 by weight.

[0018] The weight percentage of the nano-trace element synergist can be 0.1 parts, 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, or 10 parts, etc.

[0019] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0020] The components of the organic water-soluble fertilizer in this invention, when formulated in the specific ratios described above, exhibit better soil improvement performance, enhance soil nutrients, promote crop growth, and increase crop yield.

[0021] Preferably, the nitrogen content in the ammonium sulfate waste liquid is not less than 102.6 g / L, for example, it can be 102.6 g / L, 103 g / L, 105 g / L, 110 g / L, 115 g / L, 120 g / L, 125 g / L or 130 g / L, etc.; the sulfur content is not less than 50.2 g / L, for example, it can be 50.2 g / L, 51 g / L, 53 g / L, 55 g / L, 60 g / L, 65 g / L, 70 g / L, 75 g / L or 80 g / L, etc.; the total heavy metal content is not higher than 4.55 mg / kg, for example, it can be 4.55 mg / kg, 4.5 mg / kg, 4.4 mg / kg, 4.2 mg / kg, 4 mg / kg, 3 mg / kg, 2 mg / kg, 1 mg / kg or 0.5 mg / kg, etc.

[0022] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0023] Preferably, the ammonium sulfate waste liquid is treated by the following steps before use: the raw ammonium sulfate waste liquid is filtered to remove insoluble matter, the pH value is adjusted, and then it is passed through a cation exchange resin to collect the liquid.

[0024] Preferably, the filtration method is physical filtration, such as passing the ammonium sulfate waste liquid raw solution through a fiber cloth or nylon mesh to intercept suspended solids.

[0025] Preferably, the reagent for adjusting the pH value includes any one or a combination of at least two of potassium hydroxide, ammonium bicarbonate, sodium hydroxide, sodium carbonate, or sodium bicarbonate.

[0026] Preferably, the pH value is 3-6, for example, it can be 3, 3.2, 3.5, 3.7, 4, 4.3, 4.5, 4.8, 5, 5.5 or 6, etc.

[0027] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0028] Preferably, the cation exchange resin is a regenerable cation exchange resin.

[0029] Preferably, the regenerator of the cation exchange resin includes any one or a combination of at least two of hydrochloric acid, sulfuric acid, nitric acid, or sodium chloride.

[0030] Preferably, the composting fermentation waste liquid contains 40-60 g / L of organic matter, for example, 40 g / L, 42 g / L, 44 g / L, 46 g / L, 48 g / L, 50 g / L, 52 g / L, 54 g / L, 56 g / L, 58 g / L, or 60 g / L; 2-5 g / L of nitrogen, for example, 2 g / L, 2.2 g / L, 2.4 g / L, 2.6 g / L, 2.8 g / L, 3 g / L, 3.2 g / L, 3.4 g / L, 3.6 g / L, 3.8 g / L, 4 g / L, 4.2 g / L, 4.4 g / L, 4.6 g / L, 4.8 g / L, or 5 g / L; and 5-10 g / L of phosphorus, for example, 5 g / L, 5.5 g / L, 6 g / L, 6.5 g / L, or 7 g / L. The concentrations are 7.5 g / L, 8 g / L, 8.5 g / L, 9 g / L, 9.5 g / L, or 10 g / L, etc.; the potassium content is 3-6 g / L, for example, it can be 3 g / L, 3.5 g / L, 4 g / L, 4.5 g / L, 5 g / L, 5.5 g / L, or 6 g / L, etc.

[0031] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0032] Preferably, the organic nutritional supplement includes fulvic acid, spermidine, chitin, and phycocyanin.

[0033] In this invention, fulvic acid, spermidine, chitin, and alginate have a synergistic effect, which improves the soil's acid-base buffering capacity, provides sufficient nutrients for crops, and increases crop yield.

[0034] Preferably, the mass ratio of humic acid, spermidine, chitin and phycocyanin is (1-10):(1-10):(1-10):(1-10).

[0035] The specific point values ​​in the first (1-10) can be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0036] The specific point values ​​in the second (1-10) can be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0037] The specific point values ​​in the third (1-10) can be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0038] The specific point values ​​in the fourth (1-10) can be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0039] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0040] Preferably, the nano-trace element synergist includes nano-molybdenum oxide, nano-nickel oxide, nano-selenium oxide, nano-boron oxide, and nano-manganese oxide.

[0041] In this invention, nano molybdenum oxide, nano nickel oxide, nano selenium oxide, nano boron oxide, and nano manganese oxide have a synergistic effect, providing more nanoscale trace elements (1-100 nm) for crop growth and improving crop yield and quality.

[0042] Preferably, the mass ratio of the nano molybdenum oxide, nano nickel oxide, nano selenium oxide, nano boron oxide and nano manganese oxide is (0.5-5):(0.5-5):(0.5-5):(0.5-5):(0.5-5).

[0043] The specific point values ​​in the first (0.5-5) can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0044] The specific point values ​​in the second (0.5-5) can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0045] The specific point values ​​in the third (0.5-5) can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0046] The specific point values ​​in the fourth (0.5-5) can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0047] The specific point values ​​in the fifth (0.5-5) can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5, etc.

[0048] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0049] Preferably, the components of the organic water-soluble fertilizer also include a suspending agent.

[0050] Preferably, the organic water-soluble fertilizer further comprises 1-5 parts by weight of a suspending agent.

[0051] The weight percentage of the suspending agent can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts, etc.

[0052] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0053] Preferably, the suspending agent comprises any one or a combination of at least two of xanthan gum, sodium alginate, chitosan, carboxymethyl cellulose, polyacrylamide, polyvinyl alcohol, sodium lignosulfonate, sodium dodecylbenzenesulfonate, kaolin, or bentonite.

[0054] In a second aspect, the present invention provides a method for preparing organic water-soluble fertilizer as described in the first aspect, the method comprising: mixing ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist, heating, homogenizing, cooling, and obtaining the organic water-soluble fertilizer.

[0055] Preferably, the mixing method is stirring.

[0056] Preferably, the heating process specifically involves raising the temperature to 70-80°C, for example, 70°C, 71°C, 72°C, 73°C, 74°C, 75°C, 76°C, 77°C, 78°C, 79°C, or 80°C.

[0057] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0058] Preferably, the homogenization process also includes the addition of a suspending agent.

[0059] Preferably, the homogenization time is 30-60 min, for example, it can be 30 min, 35 min, 40 min, 45 min, 50 min, 55 min or 60 min, etc.

[0060] Preferably, the cooling process specifically involves reducing the temperature to 20-30°C, for example, 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, or 30°C.

[0061] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0062] Thirdly, the present invention provides the application of the organic water-soluble fertilizer as described in the first aspect in soil remediation.

[0063] Preferably, the soil includes any one of compacted soil, acidic soil, or soil from continuous cropping.

[0064] Compared with the prior art, the present invention has the following beneficial effects:

[0065] This invention is the first to reuse ammonium sulfate waste liquid and compost fermentation waste liquid in the production of agricultural fertilizers. By combining organic nutrient supplements and nano-trace element synergists, a green and environmentally friendly organic water-soluble fertilizer is prepared, realizing the resource utilization of ammonium sulfate waste liquid and compost fermentation waste liquid. The organic water-soluble fertilizer provided by this invention can effectively improve the physical, chemical and biological properties of the soil, increase soil nutrients, promote crop growth, and increase crop yield.

[0066] In this invention, ammonium sulfate waste liquid and compost fermentation waste liquid have a synergistic effect, which increases the organic matter content of the soil, improves the aggregate structure, enhances the air permeability and water retention, and maintains the soil micro-ecological balance; organic nutrient supplement and nano trace element synergist have a synergistic effect, which provides sufficient nutrients for crops, supplements soil trace elements, and improves the soil's acid-base buffering capacity. Detailed Implementation

[0067] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0068] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with the techniques or conditions described in the literature in this field, or in accordance with the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels.

[0069] The sources of materials used in the following specific embodiments are as follows:

[0070] The ammonium sulfate waste liquid sourced from Evonik Specialty Chemicals (Shanghai) Co., Ltd.; the composting fermentation waste liquid was collected from the Jinshan plant of Shike Biotechnology (Shanghai) Co., Ltd. After centralized collection, the composting fermentation waste liquid was allowed to settle and the supernatant was extracted for later use.

[0071] Fulvic acid was purchased from Shandong Agricultural University Fertilizer Technology Co., Ltd., model: mineral fulvic acid; spermidine was purchased from Shaanxi Bolin Biotechnology Co., Ltd.; chitin was purchased from Xi'an Shizeyuan Biotechnology Co., Ltd., CAS No. 9012-76-4; alginate was purchased from Nanjing Qiangsheng Agricultural Technology Co., Ltd.; nano molybdenum oxide was purchased from Bohuas Nanotechnology (Ningbo) Co., Ltd.; nano nickel oxide was purchased from Tianjin Xidian Chemical Technology Co., Ltd.; nano selenium oxide was purchased from Xi'an Qiyue Biotechnology; nano boron oxide was purchased from Beijing Deco Island Gold Technology Co., Ltd.; nano manganese oxide was purchased from Nanjing Dongna Biotechnology Co., Ltd.; xanthan gum was purchased from Jiangsu Guangrui Biotechnology Co., Ltd.; sodium alginate was purchased from Wuhan Jinyixiang Fine Chemical Co., Ltd.; and chitosan was purchased from Shanghai Maokang Biotechnology Co., Ltd.

[0072] Example 1

[0073] This embodiment provides an organic water-soluble fertilizer, which comprises the following components by weight:

[0074]

[0075] The preparation method includes: mixing pretreated ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist, stirring evenly, heating to 75°C, adding suspending agent and homogenizing for 45 min, cooling to 25°C, to obtain the organic water-soluble fertilizer.

[0076] The ammonium sulfate waste liquid undergoes the following pretreatment before use: the raw ammonium sulfate waste liquid is filtered through a fiber cloth to remove insoluble matter, the pH is adjusted to 5 with potassium hydroxide, and after passing through a strongly acidic sulfonic acid resin, the effluent is collected. Testing revealed that the treated ammonium sulfate waste liquid contained 110 g / L of nitrogen, 70 g / L of sulfur, and 1 mg / kg of total heavy metals.

[0077] The composting fermentation waste liquid was tested and found to contain 50 g / L of organic matter, 4 g / L of nitrogen, 8 g / L of phosphorus, and 5 g / L of potassium.

[0078] Example 2

[0079] This embodiment provides an organic water-soluble fertilizer, which comprises the following components by weight:

[0080]

[0081] The preparation method includes: mixing pretreated ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist, stirring evenly, heating to 70°C, adding suspending agent and homogenizing for 30 min, cooling to 20°C, to obtain the organic water-soluble fertilizer.

[0082] The ammonium sulfate waste liquid undergoes the following pretreatment before use: the raw ammonium sulfate waste liquid is filtered through a fiber cloth to remove insoluble matter, the pH is adjusted to 6 with potassium hydroxide, and after passing through a strongly acidic sulfonic acid resin, the effluent is collected. Testing revealed that the treated ammonium sulfate waste liquid contained 105 g / L of nitrogen, 60 g / L of sulfur, and 2 mg / kg of total heavy metals.

[0083] The composting fermentation waste liquid was tested and found to contain 40 g / L of organic matter, 5 g / L of nitrogen, 5 g / L of phosphorus, and 6 g / L of potassium.

[0084] Example 3

[0085] This embodiment provides an organic water-soluble fertilizer, which comprises the following components by weight:

[0086]

[0087] The preparation method includes: mixing pretreated ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist, stirring evenly, heating to 80°C, adding suspending agent and homogenizing for 60 min, cooling to 30°C, to obtain the organic water-soluble fertilizer.

[0088] The ammonium sulfate waste liquid undergoes the following pretreatment before use: the raw ammonium sulfate waste liquid is filtered through a fiber cloth to remove insoluble matter, the pH is adjusted to 3 with potassium hydroxide, and after passing through a strongly acidic sulfonic acid resin, the effluent is collected. Testing revealed that the treated ammonium sulfate waste liquid contained 115 g / L of nitrogen, 80 g / L of sulfur, and 1.5 mg / kg of total heavy metals.

[0089] The composting fermentation waste liquid was tested and found to contain 60 g / L of organic matter, 2 g / L of nitrogen, 10 g / L of phosphorus, and 3 g / L of potassium.

[0090] Example 4

[0091] This embodiment provides an organic water-soluble fertilizer, which differs from Embodiment 1 only in that: fulvic acid is not added, and its reduced amount is proportionally allocated to the other three components of the organic nutrient supplement, while other raw materials and steps remain unchanged.

[0092] Example 5

[0093] This embodiment provides an organic water-soluble fertilizer, which differs from Example 1 only in that: spermidine is not added, and its reduced amount is proportionally allocated to the other three components of the organic nutrient supplement, while other raw materials and steps remain unchanged.

[0094] Example 6

[0095] This embodiment provides an organic water-soluble fertilizer, which differs from Embodiment 1 only in that: chitin is not added, and its reduced amount is proportionally allocated to the other three components of the organic nutrient supplement, while other raw materials and steps remain unchanged.

[0096] Example 7

[0097] This embodiment provides an organic water-soluble fertilizer, which differs from Embodiment 1 only in that: no seaweed extract is added, and its reduced amount is proportionally allocated to the other three components of the organic nutrient supplement, while other raw materials and steps remain unchanged.

[0098] Example 8

[0099] This embodiment provides an organic water-soluble fertilizer, which differs from Embodiment 1 only in that: nano molybdenum oxide, nano nickel oxide, and nano selenium oxide are not added, and their reduction is proportionally allocated to nano boron oxide and nano manganese oxide, while other raw materials and steps remain unchanged.

[0100] Example 9

[0101] This embodiment provides an organic water-soluble fertilizer, which differs from Embodiment 1 only in that: nano selenium oxide, nano boron oxide, and nano manganese oxide are not added, and their reduction is proportionally allocated to nano molybdenum oxide and nano nickel oxide, while other raw materials and steps remain unchanged.

[0102] Comparative Example 1

[0103] This comparative example provides an organic water-soluble fertilizer, which differs from Example 1 only in that: no ammonium sulfate waste liquid is added, and the reduction is made up by composting fermentation waste liquid, while other raw materials and steps remain unchanged.

[0104] Comparative Example 2

[0105] This comparative example provides an organic water-soluble fertilizer, which differs from Example 1 only in that: no composting fermentation waste liquid is added, and the reduction is made up by ammonium sulfate waste liquid, while other raw materials and steps remain unchanged.

[0106] Comparative Example 3

[0107] This comparative example provides an organic water-soluble fertilizer, which differs from Example 1 only in that: no organic nutrient supplement is added, and the reduction is made up by a nano-trace element synergist, while other raw materials and steps remain unchanged.

[0108] Comparative Example 4

[0109] This comparative example provides an organic water-soluble fertilizer, which differs from Example 1 only in that: no nano-trace element synergist is added, and the reduction is made up by organic nutrient supplements, while other raw materials and steps remain unchanged.

[0110] Test Example 1

[0111] The soil in the greenhouse facilities with severe compaction was divided into equal sections, and organic water-soluble fertilizers prepared in Examples 1-9 and Comparative Examples 1-4 were applied respectively, at a rate of 100 kg / mu. After 10 days, the soil physicochemical properties were tested. Organic matter was tested according to NT / Y1121.6-2006 "Soil Testing Part 6: Determination of Soil Organic Matter". Total nitrogen was digested with potassium dichromate-sulfuric acid accelerator and determined by SKD-2000 fully automatic Kjeldahl nitrogen analyzer. Available phosphorus was tested according to NY / T1121.7-2014 "Soil Testing Part 7: Determination of Available Phosphorus in Soil". Available potassium was tested according to NY / T889-2004 "Determination of Available and Slow-release Potassium Content in Soil".

[0112] The test results are shown in Table 1. The organic water-soluble fertilizer provided by this invention can effectively improve the physical and chemical properties of the soil, increase the content of organic matter, total nitrogen, available phosphorus and available potassium, which is beneficial to crop growth. Ammonium sulfate waste liquid and compost fermentation waste liquid have a synergistic effect, organic nutrient supplement and nano trace element synergist have a synergistic effect, which improves soil nutrients. Fulvic acid, spermidine, chitin and seaweed extract have a synergistic effect, nano molybdenum oxide, nano nickel oxide, nano selenium oxide, nano boron oxide and nano manganese oxide have a synergistic effect, which effectively improves the soil environment.

[0113]

[0114] Test Example 2

[0115] (1) Test location: No. 2070, Lvxin Road, Jinshan District, Shanghai (Shike Jinshan Base owns greenhouse);

[0116] (2) Test soil: organic matter 28.05 g / kg, available nitrogen 144 mg / kg, available phosphorus 46.51 mg / kg, available potassium 225.07 mg / kg, pH 6.24;

[0117] (3) Test crop: Chinese cabbage, variety "Meilv Qinggengcai";

[0118] (4) Testing process: The test crop was transplanted in raised beds, with a total of 45 plots and a measured area of ​​22 m² per plot. 2 (2 m × 11 m), spray 22 mL / plot (10 L / hm) of organic water-soluble fertilizer prepared in Examples 1-9 and Comparative Examples 1-4 respectively. 2 Dilute 100 times and use, spray 3 times, with each treatment repeated 3 times; Control group 1 (CK1): no fertilizer, no spraying; Control group 2 (CK2): no fertilizer, sprayed with an equal amount of water at the same time;

[0119] (5) Test results: As shown in Table 2, the organic water-soluble fertilizer provided by the present invention can effectively improve the physical and chemical properties of the soil, increase soil nutrients, promote crop growth, and increase crop yield; ammonium sulfate waste liquid and compost fermentation waste liquid have a synergistic effect, organic nutrient supplement and nano trace element synergist have a synergistic effect, improve soil nutrients, and improve crop yield and quality; humic acid, spermidine, chitin and seaweed extract have a synergistic effect, nano molybdenum oxide, nano nickel oxide, nano selenium oxide, nano boron oxide and nano manganese oxide have a synergistic effect, effectively promoting crop growth.

[0120]

[0121] This invention illustrates an organic water-soluble fertilizer, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

[0122] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0123] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. An organic water-soluble fertilizer, characterized in that, The components of the organic water-soluble fertilizer include ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplements, and nano-trace element synergists. The organic nutritional supplement includes any one or a combination of at least two of fulvic acid, spermidine, chitin, or phycocyanin. The nano-trace element synergist includes any one or a combination of at least two of nano-molybdenum oxide, nano-nickel oxide, nano-selenium oxide, nano-boron oxide, or nano-manganese oxide.

2. The organic water-soluble fertilizer according to claim 1, characterized in that, The organic water-soluble fertilizer comprises, by weight, 10-20 parts ammonium sulfate waste liquid, 30-45 parts compost fermentation waste liquid, 25-35 parts organic nutrient supplement, and 0.1-10 parts nano-trace element synergist.

3. The organic water-soluble fertilizer according to claim 1 or 2, characterized in that, The ammonium sulfate waste liquid contains not less than 102.6 g / L of nitrogen, not less than 50.2 g / L of sulfur, and not more than 4.55 mg / kg of total heavy metals.

4. The organic water-soluble fertilizer according to any one of claims 1-3, characterized in that, The composting fermentation waste liquid contains 40-60 g / L of organic matter, 2-5 g / L of nitrogen, 5-10 g / L of phosphorus, and 3-6 g / L of potassium.

5. The organic water-soluble fertilizer according to any one of claims 1-4, characterized in that, The organic nutritional supplement includes fulvic acid, spermidine, chitin, and alginate; Preferably, the nano-trace element synergist includes nano-molybdenum oxide, nano-nickel oxide, nano-selenium oxide, nano-boron oxide, and nano-manganese oxide.

6. The organic water-soluble fertilizer according to any one of claims 1-5, characterized in that, The components of the organic water-soluble fertilizer also include a suspending agent; Preferably, the organic water-soluble fertilizer further comprises 1-5 parts by weight of a suspending agent; Preferably, the suspending agent comprises any one or a combination of at least two of xanthan gum, sodium alginate, chitosan, carboxymethyl cellulose, polyacrylamide, polyvinyl alcohol, sodium lignosulfonate, sodium dodecylbenzenesulfonate, kaolin, or bentonite.

7. The method for preparing the organic water-soluble fertilizer according to any one of claims 1-6, characterized in that, The preparation method includes: mixing ammonium sulfate waste liquid, compost fermentation waste liquid, organic nutrient supplement and nano-trace element synergist, heating, homogenizing, cooling, and obtaining the organic water-soluble fertilizer.

8. The preparation method according to claim 7, characterized in that, The mixing method is stirring; Preferably, the heating process specifically involves raising the temperature to 70-80°C; Preferably, the homogenization process further includes the addition of a suspending agent; Preferably, the homogenization time is 30-60 min; Preferably, the cooling process specifically involves reducing the temperature to 20-30°C.

9. The application of the organic water-soluble fertilizer according to any one of claims 1-6 in soil remediation.

10. The application according to claim 9, characterized in that, The soil includes any one of compacted soil, acidic soil, or soil from continuous cropping.

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