Fruit and vegetable nutrient solution as well as preparation method and application thereof

Abstract

The invention relates to a fruit and vegetable nutrient solution and a preparation method and application thereof, and belongs to the technical field of agricultural planting. The fruit and vegetable nutrient solution comprises a solution A and a solution B, water is used as a solvent, and each liter of the solution A comprises the following components by mass: 50-80 g of boric acid, 30-50 g of manganese sulfate tetrahydrate, 60-100 g of ammonium sulfate, 60-100 g of potassium fulvate, 40-60 g of magnesium sulfate, 30-50 g of citric acid chelated titanium, 30-50 g of ethylene diamine tetraacetic acid chelated molybdenum, 40-60 g of sugar alcohol zinc, 40-60 g of amino acid chelated iron, 40-60 g of sugar alcohol calcium and 30-50 g of algae iodine; water is taken as a solvent, and each liter of the solution B comprises the following components by mass: 1-2g of bacillus megatherium and 3-5g of bacillus mucilaginosus; the volume ratio of the solution A to the solution B is (1-2): 1. The fruit and vegetable nutrient solution is used after being diluted by 80-100 times, the yield of fruits and vegetables can be increased, and the quality of the fruits and vegetables can be improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural planting technology, and in particular to a fruit and vegetable nutrient solution, its preparation method, and its application. Background Technology

[0002] Fruit and vegetable nutrient solutions are liquids prepared by mixing substances with certain effects to increase crop yield. Most existing fruit and vegetable nutrient solutions are prepared by mixing essential plant elements such as nitrogen, phosphorus, and potassium. While these solutions can increase crop yield to some extent, the effect is not significant. Some fruit and vegetable nutrient solutions also add micronutrients necessary for plant growth. However, the effects of these solutions are relatively singular; they only increase crop yield without improving crop quality, reducing pesticide residues, providing preservatives, or protecting color.

[0003] Based on this, the present invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a fruit and vegetable nutrient solution, its preparation method, and its application.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides a fruit and vegetable nutrient solution, comprising solution A and solution B;

[0007] Using water as a solvent, each liter of solution A contains the following components by mass:

[0008] Boric acid 50-80g, manganese sulfate tetrahydrate 30-50g, ammonium sulfate 60-100g, potassium humate 60-100g, magnesium sulfate 40-60g, citric acid chelated titanium 30-50g, ethylenediaminetetraacetic acid chelated molybdenum 30-50g, sugar alcohol zinc 40-60g, amino acid chelated iron 40-60g, sugar alcohol calcium 40-60g, seaweed iodine 30-50g;

[0009] Using water as a solvent, each liter of solution B contains the following components by mass:

[0010] 1-2g of Bacillus megaterium and 3-5g of Bacillus mucilaginosus;

[0011] The volume ratio of liquid A to liquid B is 1 to 2:1.

[0012] As a preferred option, liquid A and liquid B are included;

[0013] Using water as a solvent, each liter of solution A contains the following components by mass:

[0014] Boric acid 60-70g, manganese sulfate tetrahydrate 35-45g, ammonium sulfate 70-90g, potassium humate 70-90g, magnesium sulfate 45-55g, citric acid chelated titanium 35-45g, ethylenediaminetetraacetic acid chelated molybdenum 35-45g, sugar alcohol zinc 45-55g, amino acid chelated iron 45-55g, sugar alcohol calcium 45-55g, seaweed iodine 35-45g;

[0015] Using water as a solvent, each liter of solution B contains the following components by mass:

[0016] Bacillus megaterium 1.25–1.75 g, Bacillus mucilaginosus 3.5–4.5 g;

[0017] The volume ratio of liquid A to liquid B is 1.25 to 1.75:1.

[0018] As a preferred option, liquid A and liquid B are included;

[0019] Using water as a solvent, each liter of solution A contains the following components by mass:

[0020] Boric acid 65g, manganese sulfate tetrahydrate 40g, ammonium sulfate 80g, potassium humate 80g, magnesium sulfate 50g, citric acid chelated titanium 40g, ethylenediaminetetraacetic acid chelated molybdenum 40g, sugar alcohol zinc 50g, amino acid chelated iron 50g, sugar alcohol calcium 50g, seaweed iodine 40g.

[0021] Using water as a solvent, each liter of solution B contains the following components by mass (g):

[0022] 1.5g of Bacillus megaterium and 4g of Bacillus mucilaginosus;

[0023] The volume ratio of liquid A to liquid B is 1.5:1.

[0024] Preferably, the initial viable concentration of the *Bacillus megaterium* is ≥1.0 × 10⁻⁶. 10 cfu / g;

[0025] The initial viable concentration of the *Bacillus mucilaginosus* is ≥5.0 × 10⁻⁶. 9 cfu / g.

[0026] The present invention also provides a method for preparing the aforementioned fruit and vegetable nutrient solution, comprising the following steps:

[0027] (1) Mix boric acid, manganese sulfate tetrahydrate, ammonium sulfate, potassium humate, magnesium sulfate, citrate chelated titanium, ethylenediaminetetraacetic acid chelated molybdenum, sugar alcohol zinc, amino acid chelated iron, sugar alcohol calcium, seaweed iodine and water, stir to obtain solution A;

[0028] (2) Mix Bacillus megaterium and Bacillus mucilaginosus with water and stir to obtain solution B;

[0029] (3) Mix the A solution with the B solution and let stand to obtain the fruit and vegetable nutrient solution.

[0030] Preferably, the stirring speed in step (1) is 200-300 rpm;

[0031] The stirring time in step (1) is 1 to 2 hours.

[0032] Preferably, the stirring speed in step (2) is 100-200 rpm;

[0033] The stirring time in step (2) is 30 to 50 minutes.

[0034] Preferably, the settling time in step (3) is 5 to 10 minutes.

[0035] The present invention also provides the application of the fruit and vegetable nutrient solution and the fruit and vegetable nutrient solution prepared by the preparation method in improving the yield and / or quality of fruits and vegetables.

[0036] Preferably, fruit and vegetable nutrient solutions are used to improve the yield and / or quality of fruits and vegetables by spraying and / or drenching.

[0037] This invention provides a fruit and vegetable nutrient solution, its preparation method, and its application. The fruit and vegetable nutrient solution of this invention has the following advantages:

[0038] (1) The fruit and vegetable nutrient solution of the present invention not only contains nitrogen, phosphorus and potassium elements necessary for crop growth, but also contains medium and trace elements such as boron, molybdenum, zinc and iron. Potassium humate and beneficial bacteria are added, which can gradually loosen the compacted soil in saline-alkali land, thoroughly improve the physical and chemical properties of the soil, increase the organic components of the soil, facilitate ventilation and aeration, and promote the soil to achieve the purpose of water retention and fertilizer retention.

[0039] (2) The fruit and vegetable nutrient solution of the present invention contains Bacillus megaterium and Bacillus mucilaginosus. Bacillus megaterium has a strong ability to fix nitrogen and solubilize phosphorus, reducing the content of fixed nitrogen and phosphorus in the soil and enabling crops to obtain more nitrogen and phosphorus. Bacillus mucilaginosus has a strong ability to decompose potassium. A single Bacillus mucilaginosus cell is surrounded by a capsule, and multiple cells are cross-linked together through the capsule to form a gelatinous mass. These gelatinous masses are formed by extracellular polysaccharides secreted by the cells during their growth and reproduction. Extracellular polysaccharides are one of the essential conditions for bacteria to destroy the mineral crystal structure. Their presence can release potassium nutrients in the mineral structure for crop utilization.

[0040] (3) The fruit and vegetable nutrient solution of the present invention can promote the formation and storage of amino acids, proteins, and sugars in crops, forming strong antibodies. The beneficial bacteria in the fruit and vegetable nutrient solution of the present invention multiply rapidly, forming a dominant population in the crop rhizosphere soil micro-ecosystem, inhibiting the growth and reproduction of other harmful microorganisms, and even antagonizing some harmful pathogens, reducing the chances of harm from harmful microorganisms. The beneficial bacteria of the present invention can also secrete metabolites, which can stimulate crop growth and improve crop resistance to adverse environments. The mucopolysaccharides secreted by the beneficial bacteria can increase soil aggregate structure, improve fertilizer utilization, promote robust crop growth, and result in good plant type and a reasonable population structure, enhancing crop disease resistance and reducing the occurrence of diseases.

[0041] (4) The fruit and vegetable nutrient solution of the present invention has a strong cation exchange capacity, which can absorb more nutrients such as potassium, ammonium, magnesium, and zinc, prevent leaching, improve soil fertility, and increase the content of available calcium in the soil. At the same time, the organic acids produced by microorganisms decomposing organic matter can also activate the calcium adsorbed in the soil, strengthen the replacement of adsorbed sodium in the soil, and lead to desalination and dealkalization. Under the action of the fruit and vegetable nutrient solution of the present invention, the content of harmful ions and pH value of saline-alkali land are significantly reduced, the soil buffering capacity is increased, and the acidity changes caused by long-term application of chemical fertilizers can prevent them from affecting crop growth, improve the soil's own stress resistance, and ensure that crops have a good soil ecological environment.

[0042] (5) The fruit and vegetable nutrient solution of the present invention can be seen after 5 to 10 days of use. It can not only make weak seedlings stronger, yellow leaves turn green, small leaves larger and roots developed in the early stage, but also make the stems strong, drought-resistant, waterlogging-resistant, lodging-resistant, fruit setting rate high, grains full, bright color, and excellent quality, resulting in high yield and income increase.

[0043] (6) The fruit and vegetable nutrient solution of the present invention has a wide range of applications and can be applied to wheat, corn, cotton, peanuts, rapeseed, rice, soybeans, tobacco, melons, fruits, vegetables, Chinese medicinal materials, yam, sweet potato, potato, beet, flowers, tea, fruit trees, forest trees and various crops. Detailed Implementation

[0044] This invention provides a fruit and vegetable nutrient solution, comprising solution A and solution B;

[0045] Using water as a solvent, each liter of solution A contains the following components by mass:

[0046] Boric acid 50-80g, preferably 60-70g, more preferably 65g;

[0047] 30-50g of manganese sulfate tetrahydrate, preferably 35-45g, and more preferably 40g;

[0048] Ammonium sulfate 60-100g, preferably 70-90g, more preferably 80g;

[0049] Potassium humate 60-100g, preferably 70-90g, more preferably 80g;

[0050] Magnesium sulfate 40-60g, preferably 45-55g, more preferably 50g;

[0051] Citric acid chelated titanium 30-50g, preferably 35-45g, more preferably 40g;

[0052] 30-50g of molybdenum chelated with ethylenediaminetetraacetic acid, preferably 35-45g, and more preferably 40g;

[0053] Zinc sugar alcohol 40-60g, preferably 45-55g, more preferably 50g;

[0054] Amino acid chelated iron: 40-60g, preferably 45-55g, more preferably 50g;

[0055] Sugar alcohol calcium 40-60g, preferably 45-55g, more preferably 50g;

[0056] 30-50g of seaweed iodine, preferably 35-45g, and more preferably 40g;

[0057] Using water as a solvent, each liter of solution B contains the following components by mass (g):

[0058] 1-2g of Bacillus megaterium, preferably 1.25-1.75g, and more preferably 1.5g;

[0059] The amount of Bacillus mucilaginosus is 3-5g, preferably 3.5-4.5g, and more preferably 4g;

[0060] The volume ratio of liquid A to liquid B is 1 to 2:1, preferably 1.25 to 1.75:1, and more preferably 1.5:1.

[0061] In this invention, the initial viable concentration of the *Bacillus megaterium* is ≥1.0 × 10⁻⁶. 10 cfu / g; the initial viable concentration of the *Bacillus mucilaginosus* is ≥5.0 × 10⁻⁶. 9 CFU / g. In this invention, the *Bacillus megaterium* was purchased from Shandong Qilu Chemical Technology Co., Ltd., and this *Bacillus megaterium* is water-soluble; the *Bacillus mucilaginosus* was purchased from Weifang Ruichen Biotechnology Co., Ltd., and this *Bacillus mucilaginosus* is also water-soluble.

[0062] The present invention also provides a method for preparing the aforementioned fruit and vegetable nutrient solution, comprising the following steps:

[0063] (1) Mix boric acid, manganese sulfate tetrahydrate, ammonium sulfate, potassium humate, magnesium sulfate, citric acid chelated titanium, ethylenediaminetetraacetic acid chelated molybdenum, sugar alcohol zinc, amino acid chelated iron, sugar alcohol calcium, seaweed iodine and water, stir to obtain solution A; (2) Mix Bacillus megaterium and Bacillus mucilaginosus with water, stir to obtain solution B; (3) Mix solution A and solution B, let stand to obtain fruit and vegetable nutrient solution.

[0064] In this invention, the stirring in step (1) is performed using a magnetic stirrer. The stirring speed in step (1) is 200-300 rpm, preferably 250 rpm; the stirring time in step (1) is 1-2 hours, preferably 1.5 hours. The purpose of stirring in step (1) is to accelerate dissolution and achieve more uniform dissolution. In this invention, the stirring speed in step (2) is 100-200 rpm, preferably 150 rpm; the stirring time in step (2) is 30-50 minutes, preferably 40 minutes. In this invention, the settling time in step (3) is 5-10 minutes, preferably 7.5 minutes.

[0065] This invention also provides the application of the aforementioned fruit and vegetable nutrient solution and the fruit and vegetable nutrient solution prepared by the aforementioned method in improving fruit and vegetable yield and / or quality. In this invention, the fruit and vegetable nutrient solution is used to improve fruit and vegetable yield and / or quality by spraying and / or root irrigation. In this invention, the fruit and vegetable nutrient solution is diluted before use, with a dilution ratio of 80 to 100 times. In this invention, solution B in the fruit and vegetable nutrient solution will have better results when freshly prepared before use.

[0066] The following detailed description of the solutions provided by the present invention, in conjunction with the embodiments, should not be construed as limiting the scope of protection of the present invention.

[0067] The Bacillus megaterium described in this embodiment of the invention was purchased from Shandong Qilu Chemical Technology Co., Ltd., and its initial viable cell concentration was ≥1.0×10⁻⁶. 10 cfu / g; the Bacillus mucilaginosus was purchased from Weifang Ruichen Biotechnology Co., Ltd., with an initial viable bacterial concentration ≥5.0×10⁻⁶. 9 cfu / g.

[0068] Example 1

[0069] Take 1L of distilled water, add 50g boric acid, 50g manganese sulfate tetrahydrate, 80g ammonium sulfate, 60g potassium humate, 50g magnesium sulfate, 50g citric acid chelated titanium, 40g ethylenediaminetetraacetic acid chelated molybdenum, 40g sugar alcohol zinc, 40g amino acid chelated iron, 60g sugar alcohol calcium, and 40g seaweed iodine. Turn on the magnetic stirrer, adjust the speed to 300 rpm, and stir for 1.5 hours until all substances are completely dissolved to obtain solution A.

[0070] Take 1L of distilled water, add 2g of Bacillus megaterium and 3g of Bacillus mucilaginosus, and stir in a stirrer at 100rpm for 40min to dissolve the bacterial agent, thus obtaining solution B.

[0071] Mix 1A solution with 1LB solution and let stand for 5 minutes to obtain fruit and vegetable nutrient solution.

[0072] Example 2

[0073] Take 1L of distilled water, add 80g boric acid, 40g manganese sulfate tetrahydrate, 60g ammonium sulfate, 80g potassium humate, 60g magnesium sulfate, 30g citrate chelated titanium, 50g ethylenediaminetetraacetic acid chelated molybdenum, 50g sugar alcohol zinc, 60g amino acid chelated iron, 50g sugar alcohol calcium, and 30g seaweed iodine. Turn on the magnetic stirrer, adjust the speed to 200 rpm, and stir for 2 hours until all substances are completely dissolved to obtain solution A.

[0074] Take 1L of distilled water, add 1.5g of Bacillus megaterium and 4g of Bacillus mucilaginosus, and stir in a stirrer at 200rpm for 30min to dissolve the bacterial agent, thus obtaining solution B.

[0075] Mix 1.5LA solution with 1LB solution and let stand for 10 minutes to obtain fruit and vegetable nutrient solution.

[0076] Example 3

[0077] Take 1L of distilled water, add 60g boric acid, 30g manganese sulfate tetrahydrate, 100g ammonium sulfate, 100g potassium humate, 40g magnesium sulfate, 40g citric acid chelated titanium, 30g ethylenediaminetetraacetic acid chelated molybdenum, 60g sugar alcohol zinc, 50g amino acid chelated iron, 40g sugar alcohol calcium, and 50g seaweed iodine. Turn on the magnetic stirrer, adjust the speed to 300 rpm, and stir for 2 hours until all substances are completely dissolved to obtain solution A.

[0078] Take 1L of distilled water, add 1g of Bacillus megaterium and 5g of Bacillus mucilaginosus, and stir in a stirrer at 100rpm for 50min to dissolve the bacterial agent and obtain solution B.

[0079] Mix 1A solution with 1LB solution and let stand for 10 minutes to obtain fruit and vegetable nutrient solution.

[0080] Experimental Example 1

[0081] The sensory morphology of the fruit and vegetable nutrient solutions from Examples 1 to 3 was observed. The fruit and vegetable nutrient solutions from Examples 1 to 3 were diluted 80 and 100 times respectively, and the contents of macro-elements, micro-elements, meso-elements, and water-insoluble matter in the diluted solutions were then measured. The results are shown in Table 1.

[0082] After observation, the fruit and vegetable nutrient solutions obtained in Examples 1-3 were clear, without sediment or impurities.

[0083] Table 1. Nutrient composition content in fruit and vegetable nutrient solutions diluted 80 and 100 times.

[0084]

[0085]

[0086] Table 1 shows that after the fruit and vegetable nutrient solutions of Examples 1 to 3 were diluted 80 and 100 times, the macro-elements, micro-elements, and meso-elements still met the requirements of the national standard for macro-elements in water-soluble fertilizers (NY1107-2010).

[0087] Application Example 1

[0088] The fruit and vegetable nutrient solution obtained in Example 1 was diluted 100 times and used in the planting of Longshu No. 9 sweet potato. When Longshu No. 9 was just entering the branching and tuber-forming stage, an 8cm deep trench was dug 5cm away from the sweet potato root. The fruit and vegetable nutrient solution from Example 1, diluted 100 times, was poured into the trench at a rate of 50L / mu. After irrigating the roots, the soil was covered, completing the first root irrigation. 15 days after the first root irrigation, the roots were irrigated again in the same way. The remaining management methods were the same as those for conventional sweet potato planting. A control group was established using conventional sweet potato planting without root irrigation. When the sweet potatoes matured, they were harvested, and the yield of each group was calculated. The sweet potatoes from each group were dried, and 100g of sweet potato flour was taken to test the content of protein, amino acids, and free fatty acids in the sweet potato flour. The results are shown in Table 2.

[0089] Table 2. Effects of the fruit and vegetable nutrient solution of the present invention on the yield and quality of Longshu No. 9.

[0090] project Sweet potatoes treated with root irrigation Unwatered sweet potatoes Yield (kg / mu) 6184 4283 Protein (g / 100g) 5.8 3.2 Amino acids (g / 100g) 4.3 3.3 Free fatty acids (g / 100g) 1.52 0.98

[0091] Table 2 shows that the yield of sweet potatoes obtained by root irrigation with the fruit and vegetable nutrient solution of the present invention is higher than that of sweet potatoes without root irrigation treatment, and the protein content, amino acid content and free fatty acid content of sweet potato powder are also higher than those of sweet potato powder without root irrigation treatment.

[0092] Application Example 2

[0093] The fruit and vegetable nutrient solution obtained in Example 1 was diluted 80 times and used in the cultivation of Zhengza No. 5 watermelons. When the watermelons were just entering the fruit-setting stage, a root irrigation treatment was performed at a rate of 50 L / mu. An 8 cm deep trench was dug 5 cm away from the watermelon roots, and the 80-fold diluted fruit and vegetable nutrient solution from Example 1 was poured into the trench and covered with soil, completing the first root irrigation treatment. During the vigorous growth period of the watermelon fruit, a second root irrigation treatment was performed using the same method. The remaining methods were the same as conventional watermelon cultivation. The conventional watermelon cultivation method without root irrigation served as a control. After harvesting the watermelons, the yields of the watermelons with and without root irrigation were compared. The vitamin C content and reducing sugar content of the watermelons with and without root irrigation were measured, and the results are shown in Table 3.

[0094] Table 3. Effects of the fruit and vegetable nutrient solution of the present invention on watermelon yield and quality.

[0095] Group Yield (kg / mu) Vitamin C content (mg / kg) Reducing sugar content (g / kg) Root drenching treatment 2984 13.48 72.31 No root drenching treatment 2132 10.51 60.83

[0096] Table 3 shows that the fruit and vegetable nutrient solution of the present invention can improve the yield and quality of watermelons.

[0097] As can be seen from the above embodiments, the present invention provides a fruit and vegetable nutrient solution, its preparation method, and its application. Even after being diluted 100 times, the nutrients in the fruit and vegetable nutrient solution of the present invention still meet the standards specified in "NY 1107-2010 Water-soluble Fertilizers of Macronutrients". Furthermore, the fruit and vegetable nutrient solution of the present invention can not only increase the yield of fruits and vegetables but also improve their quality.

[0098] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fruit and vegetable nutrient solution, characterized in that, Includes liquid A and liquid B; Using water as a solvent, each liter of solution A contains the following components by mass: Boric acid 50-80g, manganese sulfate tetrahydrate 30-50g, ammonium sulfate 60-100g, potassium humate 60-100g, magnesium sulfate 40-60g, citric acid chelated titanium 30-50g, ethylenediaminetetraacetic acid chelated molybdenum 30-50g, sugar alcohol zinc 40-60g, amino acid chelated iron 40-60g, sugar alcohol calcium 40-60g, seaweed iodine 30-50g; Using water as a solvent, each liter of solution B contains the following components by mass: 1-2g of Bacillus megaterium and 3-5g of Bacillus mucilaginosus; The volume ratio of liquid A to liquid B is 1 to 2:

1.

2. The fruit and vegetable nutrient solution according to claim 1, characterized in that, Includes liquid A and liquid B; Using water as a solvent, each liter of solution A contains the following components by mass: Boric acid 60-70g, manganese sulfate tetrahydrate 35-45g, ammonium sulfate 70-90g, potassium humate 70-90g, magnesium sulfate 45-55g, citric acid chelated titanium 35-45g, ethylenediaminetetraacetic acid chelated molybdenum 35-45g, sugar alcohol zinc 45-55g, amino acid chelated iron 45-55g, sugar alcohol calcium 45-55g, seaweed iodine 35-45g; Using water as a solvent, each liter of solution B contains the following components by mass: Bacillus megaterium 1.25–1.75 g, Bacillus mucilaginosus 3.5–4.5 g; The volume ratio of liquid A to liquid B is 1.25 to 1.75:

1.

3. The fruit and vegetable nutrient solution according to claim 2, characterized in that, Includes liquid A and liquid B; Using water as a solvent, each liter of solution A contains the following components by mass: Boric acid 65g, manganese sulfate tetrahydrate 40g, ammonium sulfate 80g, potassium humate 80g, magnesium sulfate 50g, citric acid chelated titanium 40g, ethylenediaminetetraacetic acid chelated molybdenum 40g, sugar alcohol zinc 50g, amino acid chelated iron 50g, sugar alcohol calcium 50g, seaweed iodine 40g. Using water as a solvent, each liter of solution B contains the following components by mass: 1.5g of Bacillus megaterium and 4g of Bacillus mucilaginosus; The volume ratio of liquid A to liquid B is 1.5:

1.

4. The fruit and vegetable nutrient solution according to any one of claims 1 to 3, characterized in that, The initial viable concentration of the *Bacillus megaterium* is ≥1.0 × 10⁻⁶. 10 cfu / g; The initial viable concentration of the *Bacillus mucilaginosus* is ≥5.0 × 10⁻⁶. 9 cfu / g.

5. The method for preparing the fruit and vegetable nutrient solution according to any one of claims 1 to 4, characterized in that, Includes the following steps: (1) Mix boric acid, manganese sulfate tetrahydrate, ammonium sulfate, potassium humate, magnesium sulfate, citrate chelated titanium, ethylenediaminetetraacetic acid chelated molybdenum, sugar alcohol zinc, amino acid chelated iron, sugar alcohol calcium, seaweed iodine and water, stir to obtain solution A; (2) Mix Bacillus megaterium and Bacillus mucilaginosus with water and stir to obtain solution B; (3) Mix the A solution with the B solution and let stand to obtain the fruit and vegetable nutrient solution.

6. The preparation method according to claim 5, characterized in that, The stirring speed in step (1) is 200-300 rpm; The stirring time in step (1) is 1 to 2 hours.

7. The preparation method according to claim 6, characterized in that, The stirring speed in step (2) is 100-200 rpm; The stirring time in step (2) is 30 to 50 minutes.

8. The preparation method according to claim 7, characterized in that, The settling time in step (3) is 5 to 10 minutes.

9. The application of the fruit and vegetable nutrient solution according to any one of claims 1 to 4 and the fruit and vegetable nutrient solution prepared by the preparation method according to any one of claims 5 to 8 in improving the yield and / or quality of fruits and vegetables.

10. The application according to claim 9, characterized in that, The application of fruit and vegetable nutrient solutions to improve the yield and / or quality of fruits and vegetables is by spraying and / or drenching.

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