Biomass graphene additive for increasing yield of fruits and vegetables and preparation method of biomass graphene additive

Abstract

The invention belongs to the technical field of agricultural yield increasing additives, and particularly relates to a biomass graphene additive for fruit and vegetable yield increasing and a preparation method thereof. The biomass graphene additive for increasing the yield of fruits and vegetables is prepared from the following components in percentage by weight: 5 to 10 percent of biomass graphene quantum dots, 10 to 15 percent of urea, 2 to 5 percent of monocalcium phosphate, 2 to 5 percent of potassium chloride, 2 to 5 percent of seaweed extract, 2 to 5 percent of sodium selenite, 1 to 3 percent of indoleacetic acid, 1 to 3 percent of EDTA chelated zinc, 1 to 3 percent of EDDHA chelated iron, 1 to 3 percent of EDTA-Cu-6 and the balance of water. According to the invention, agricultural wastes are used as raw materials to construct a carbon quantum dot material with relatively good light absorption capability and adsorption and activation capability of water and CO2 molecules, and the carbon quantum dot material is used as a plant growth regulator to broaden the light absorption range during plant photosynthesis and regulate and control transportation and distribution of plant carbohydrates, so that yield increase of crops is finally realized; meanwhile, plants can better absorb mineral substances and trace elements, the utilization efficiency of the fertilizer is improved, loss of the fertilizer is reduced, and healthy growth of the plants is promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural yield-increasing additives, and specifically relates to a biomass graphene additive for increasing the yield of fruits and vegetables and a preparation method thereof. Background Art

[0002] With the continuous growth of the global population, especially the accelerated urbanization process in developing countries, people's demand for food is also increasing, especially fruits and vegetables, which are not only an important part of people's daily diet, but also rich in nutrients such as vitamins, minerals and dietary fiber, and are an important guarantee for healthy diet. In order to meet the increasing demand for food, agricultural production must increase the yield per unit area, which has promoted the research and application of various agricultural yield-increasing technologies and additives. In traditional agricultural production, the output of fruits and vegetables is limited by many factors such as climate conditions, soil quality, pests and diseases, and cultivation technology. In addition, due to the uncertainty of global climate change, extreme climate events such as drought, floods, and temperature changes have an increasingly serious impact on agricultural production. Therefore, improving the sustainability and stability of agricultural production has become an important goal of global agricultural development.

[0003] The application of biomass graphene in fruit and vegetable yield-increasing additives is an important research direction in the field of agricultural science and technology in recent years, combining nanotechnology with the concept of green agriculture. As a new type of nanomaterial, graphene has great potential for application in agriculture due to its unique physical and chemical properties. Combining it with biomass resources can not only effectively improve the production efficiency and quality of crops, but also promote the development of sustainable agriculture. Compared with traditional graphene, biomass graphene is more environmentally friendly, can reduce pollution to the environment, and is easier to obtain. Therefore, it is considered to be an ideal substitute for graphene, especially suitable for the agricultural field.

[0004] Existing fruit and vegetable yield-increasing additives have many problems. The Chinese patent with publication number CN106008005A discloses a high-effect vegetable blending compound fertilizer and its preparation method. Although it has a yield-increasing effect on fruits and vegetables, it still has the problem of environmental pollution. The Chinese patent with publication number CN110423164A discloses selenium-rich earthworm manure biological fruit and vegetable organic fertilizer, which uses biomass fertilizer to prepare organic fertilizer, but it will lead to excessive dependence on chemicals in the production process, which will lead to the monotony of the agricultural production system and affect the diversity and sustainable development of crops.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a graphene additive for increasing the yield of fruits and vegetables and a preparation method thereof.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: A biomass graphene additive for increasing the yield of fruits and vegetables is composed of the following percentage components: 5-10% biomass graphene quantum dots, 10-15% urea, 2-5% calcium dihydrogen phosphate, 2-5% potassium chloride, 2-5% seaweed extract, 2-5% sodium selenite, 1-3% indoleacetic acid, 1-3% EDTA chelated zinc, 1-3% EDDHA chelated iron, 1-3% EDTA-Cu-6 and the balance water;

[0008] The method for preparing biomass graphene quantum dots comprises the following steps:

[0009] A1: Collect organic agricultural waste such as straw, rice husk and bran, add them to the cleaning pool and wash them with clean water for 2-3 times, transfer them to the dryer after washing, adjust the dryer temperature to 55-65℃ and dry them for 1-2 days, transfer them to the crusher after drying, and crush the organic agricultural waste into organic agricultural waste particles with a particle size of 3-5cm;

[0010] A2: Transfer the treated organic agricultural waste particles to the pyrolysis furnace, add metal catalysts, control the heating rate, heat up 500℃ every 1h, open the air inlet valve, connect the air inlet valve to the nitrogen generator, use the vacuum pump to pump the pyrolysis furnace pressure to 0.4-0.6atm, open the air inlet valve every 30min during the pyrolysis process, connect the air inlet valve to the vacuum pump and control the pyrolysis furnace pressure to maintain at 0.4-0.6atm, open the air inlet valve for 3-5min, heat up to 2160-2240℃, and end the heating process after 5-10h of pyrolysis;

[0011] A3: After the pyrolysis is completed, the air inlet valve is fully opened and a 20-30°C nitrogen gas flow is used to cool the entire pyrolysis furnace. The cooling time is 15-30 minutes to quickly cool the product in the pyrolysis furnace to 25°C.

[0012] A4: Collect the agricultural waste particles after pyrolysis, transfer them to a vibrating separation screen with a vibration amplitude of 300-400rpm, and vibrate to separate the graphene particles and pyrolysis residue for 1-2h. Collect the separated graphene and transfer it to a grinder, grind it for 1-2h to obtain graphene particles;

[0013] A5: Add graphene particles to hydrochloric acid, adjust the separation temperature to 45-60°C, adjust the speed of the magnetic stirrer to 600-800rpm, and perform acid hydrolysis for 60-90min to remove metal oxides and organic waste in the graphene particles;

[0014] A6: Transfer the acid-hydrolyzed graphene particles to a reactor, add sodium tetraborate and purified water to the reactor, adjust the reaction temperature to 45-60°C, adjust the speed of the magnetic stirrer to 600-800 rpm, react for 60-90 minutes, and reduce the carboxyl and hydroxyl functional groups contained in the graphene particles;

[0015] A7: Transfer the reduced graphene particles to a dryer, adjust the drying temperature to 55-65°C, the wind speed to 1.5-2m / s, and dry for 24 hours to obtain biomass graphene quantum dots.

[0016] Furthermore, the metal catalyst in step A2 is Ca 2+ Add EDTA in a 1:1 ratio to pure ethanol solution and stir, then adjust n(Ca 2+ ):n(EDTA):n(Mn 2+ ): n(Cu 2+ )=1:1:1:1 ratio of Mn 2+ , Cu 2+ The obtained product is obtained by ultrasonic dispersion until completely dissolved and then baking, calcining and drying in a muffle furnace; in step A5, the mass ratio of graphene particles to hydrochloric acid is 1:5, wherein the hydrochloric acid is a 6% HCl aqueous solution; in step A6, the mass ratio of graphene particles after acid hydrolysis to sodium tetraborate is 1:6, wherein the sodium tetraborate is sodium tetraborate decahydrate.

[0017] Furthermore, a method for preparing a biomass graphene additive for increasing the yield of fruits and vegetables comprises the following steps:

[0018] B1: Add biomass graphene quantum dots, EDTA chelated zinc, EDDHA chelated iron and EDTA-Cu-6 to a stirrer, turn on the stirrer, adjust the stirrer temperature to 45-60°C, set the stirrer speed to 600-800rpm, mix for 30min, transfer to a homogenizer, and homogenize for 45-60min to obtain product A;

[0019] B2: urea, calcium dihydrogen phosphate, potassium chloride, seaweed extract, sodium selenite and indoleacetic acid were mixed and added into a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 45-60°C, the stirrer speed was set to 600-800 rpm, and the mixture was mixed for 30 minutes, then transferred to a homogenizer and homogenized for 45-60 minutes to obtain product B;

[0020] B3: Mix product A and product B and add them into a stirrer, add purified water, adjust the stirrer speed to 1000-1200 rpm, raise the temperature to 65-80° C., and stir for 30-60 min to obtain a biomass graphene additive for increasing fruit and vegetable production.

[0021] Furthermore, the seaweed extract is a water-soluble seaweed extract with a specification of 10:1; the EDTA-Cu-6 is fully soluble copper; the sodium selenite is a water-soluble feed protein sodium selenite with a specification of 45%;

[0022] In summary, due to the adoption of the above-mentioned technical scheme, the beneficial effect of the present invention is that the present invention uses agricultural waste as raw materials to construct carbon quantum dot materials with good light absorption capacity, water and CO2 molecule adsorption and activation capacity, and uses it as a plant growth regulator, broadens the light absorption range during plant photosynthesis, regulates the transport and distribution of plant carbohydrates, and ultimately achieves crop yield increase. At the same time, it helps plants to better absorb minerals and trace elements, improves the utilization efficiency of fertilizers, reduces fertilizer loss, promotes healthy plant growth, and strives to break through the technical bottlenecks of efficient carbon source locking and macro-preparation of carbon dots, and realizes economical and sustainable crop yield increase demonstration application. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0024] The experimental methods in the following examples, unless otherwise specified, are conventional methods, and are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. The materials and reagents used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0025] Example 1

[0026] 1: Collect 5kg of straw, add it to the cleaning pool and wash it with clean water for 3 times, transfer it to the dryer after washing, adjust the dryer temperature to 65℃ and dry it for 2 days, transfer it to the crusher after drying, and crush the organic agricultural waste into organic agricultural waste particles with a particle size of 3cm;

[0027] 2: Transfer the treated organic agricultural waste particles to the pyrolysis furnace, add metal catalysts at the same time, control the heating rate, heat up 500℃ every 1h, open the air inlet valve, connect the air inlet valve to the nitrogen generator, use the vacuum pump to pump the pyrolysis furnace pressure to 0.4atm, open the air inlet valve once every 30min during the pyrolysis process, connect the air inlet valve and open the vacuum pump at the same time, control the pyrolysis furnace pressure to maintain at 0.4atm, open the air inlet valve for 3min, and end the heating process by heating to 2240℃. End the pyrolysis process after 10h;

[0028] 3: After the pyrolysis is completed, open the air inlet valve completely and use a 25°C nitrogen gas flow to cool the entire pyrolysis furnace. Cool the product in the pyrolysis furnace to 25°C quickly for 15 minutes;

[0029] 4: Collect the agricultural waste particles after pyrolysis, transfer them to a vibrating separation screen with a vibration amplitude of 400 rpm, and vibrate to separate the graphene particles and pyrolysis residue for 1 hour. Collect the separated graphene and transfer it to a grinder. Grind it for 1.5 hours to obtain 542 g of graphene particles.

[0030] 5: Add 500g of graphene particles to 500ml of hydrochloric acid, adjust the separation temperature to 60°C, adjust the speed of the magnetic stirrer to 800rpm, and acid hydrolyze for 90min to remove metal oxides and organic waste in the graphene particles;

[0031] 6: Transfer 420g of graphene particles after acid hydrolysis to a reactor, add 2.52kg of sodium tetraborate and purified water to the reactor, adjust the reaction temperature to 60°C, adjust the speed of the magnetic stirrer to 800rpm, react for 90min, and reduce the carboxyl and hydroxyl functional groups contained in the graphene particles;

[0032] 7: Transfer the reduced graphene particles to a dryer, adjust the drying temperature to 65°C, the dryer wind speed to 1.5 m / s, and dry for 24 hours to obtain 440 g of Example 1.

[0033] Table 1, reagent parameters used in Example 1

[0034] Drug Name source model parameter hydrochloric acid Aladdin H399545 500ml Sodium Tetraborate Aladdin S112467 500g

[0035] Example 2

[0036] 1: Collect 5kg bran, add it to the cleaning pool and wash it with clean water for 3 times, transfer it to the dryer after washing, adjust the dryer temperature to 60℃ and dry it for 2 days, transfer it to the crusher after drying, and crush the organic agricultural waste into organic agricultural waste particles with a particle size of 5cm;

[0037] 2: Transfer the treated organic agricultural waste particles to the pyrolysis furnace, add metal catalysts at the same time, control the heating rate, heat up 500℃ every 1h, open the air inlet valve, connect the air inlet valve to the nitrogen generator, use the vacuum pump to pump the pyrolysis furnace pressure to 0.6atm, open the air inlet valve once every 30min during the pyrolysis process, connect the air inlet valve and open the vacuum pump at the same time, control the pyrolysis furnace pressure to maintain at 0.6atm, open the air inlet valve for 5min, heat up to 2160℃ to end the heating process, and pyrolysis for 10h to end the pyrolysis process;

[0038] 3: After the pyrolysis is completed, open the air inlet valve completely and use a 30°C nitrogen gas flow to cool the entire pyrolysis furnace. Cool the product in the pyrolysis furnace to 25°C quickly for 20 minutes;

[0039] 4: Collect the agricultural waste particles after pyrolysis, transfer them to a vibrating separation screen with a vibration amplitude of 400 rpm, and vibrate to separate the graphene particles and pyrolysis residue for 2 hours. Collect the separated graphene and transfer it to a grinder, grind it for 2 hours to obtain 512 g of graphene particles;

[0040] 5: Add 500g of graphene particles to 500ml of hydrochloric acid, adjust the separation temperature to 60°C, adjust the speed of the magnetic stirrer to 800rpm, and acid hydrolyze for 90min to remove metal oxides and organic waste in the graphene particles;

[0041] 6: Transfer 416g of graphene particles after acid hydrolysis to a reactor, add 2.49kg of sodium tetraborate and purified water to the reactor, adjust the reaction temperature to 55°C, adjust the speed of the magnetic stirrer to 800rpm, react for 90min, and reduce the carboxyl and hydroxyl functional groups contained in the graphene particles;

[0042] 7: Transfer the reduced graphene particles to a dryer, adjust the drying temperature to 65°C, the dryer wind speed to 1.5 m / s, and dry for 24 hours to obtain 420 g of Example 2.

[0043] Table 2, reagent parameters used in Example 2

[0044] Drug Name source model parameter hydrochloric acid Aladdin H399545 500ml Sodium Tetraborate Aladdin S112467 500g

[0045] Example 3

[0046] 1: 100g of Example 1, 30g of EDTA chelated zinc, 30g of EDDHA chelated iron and 30g of EDTA-Cu-6 were mixed and added to a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 60°C, the stirrer speed was set to 800rpm, and after mixing for 30min, the mixture was transferred to a homogenizer and homogenized for 60min to obtain product A;

[0047] 2: 100 g urea, 20 g calcium dihydrogen phosphate, 20 g potassium chloride, 20 g seaweed extract, 20 g sodium selenite and 10 g indoleacetic acid were mixed and added into a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 60°C, the stirrer speed was set to 800 rpm, and after mixing for 30 min, the mixture was transferred into a homogenizer and homogenized for 60 min to obtain product B;

[0048] 3: Product A and Product B were mixed and added into a stirrer, 680 ml of purified water was added, the stirrer speed was adjusted to 1200 rpm, the temperature was raised to 80° C., and stirred for 60 min to obtain Example 3.

[0049] Table 3, reagent parameters used in Example 3

[0050]

[0051]

[0052] Example 4

[0053] 1: 100 g of Example 2, 10 g of EDTA chelated zinc, 10 g of EDDHA chelated iron and 10 g of EDTA-Cu-6 were mixed and added to a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 60° C., the stirrer speed was set to 800 rpm, and after mixing for 30 min, the mixture was transferred to a homogenizer and homogenized for 60 min to obtain product A;

[0054] 2: 150 g urea, 50 g calcium dihydrogen phosphate, 50 g potassium chloride, 50 g seaweed extract, 50 g sodium selenite and 10 g indoleacetic acid were mixed and added into a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 60°C, the stirrer speed was set to 800 rpm, and after mixing for 30 min, the mixture was transferred into a homogenizer and homogenized for 60 min to obtain product B;

[0055] 3: Product A and Product B were mixed and added into a stirrer, 450 ml of purified water was added, the stirrer speed was adjusted to 1200 rpm, the temperature was raised to 80° C., and stirred for 60 min to obtain Example 4.

[0056] Table 4, reagent parameters used in Example 4

[0057]

[0058]

[0059] Comparative Example 1

[0060] Example 1 of the Chinese patent with publication number CN106008005A was selected as comparative example 1.

[0061] Comparative Example 2

[0062] Example 1 of the Chinese patent with publication number CN110423164A was selected as comparative example 2.

[0063] Cucumber field experiment:

[0064] A cucumber test field in Woyang County, Bozhou City, Anhui Province was selected. The test was divided into 5 groups, each group had an area of ​​3 mu, and three repeated tests were set for each group. The additives prepared in Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were applied respectively. The fifth group was a control group and was not treated. 45 cucumber seedlings were transplanted per mu of the test field, the number of diseased plants was observed, and the seedling rate of the additive of the present invention was tested;

[0065] Table 5, cucumber field seedling rate experiment

[0066]

[0067]

[0068] By analyzing Table 5, it can be seen that the additives prepared in Examples 3 and 4 have obvious disease resistance on cucumber seedlings, among which the cucumber seedlings to which the additive prepared in Example 3 is applied have the best seedling rate.

[0069] Cabbage field experiment:

[0070] A Chinese cabbage test field in Yongqiao District, Suzhou City, Anhui Province was selected. The test was divided into 5 groups, each with 3 mu, and three repeated tests were set for each group. The additives prepared in Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were applied respectively. The fifth group was a control group without any treatment. 3,000 cabbages were planted per mu, with a row spacing of 40 cm*50 cm. The average yield per mu was recorded after harvest;

[0071] Table 6, results of the experiment on yield of Chinese cabbage per mu

[0072] Group Average yield per mu (kg / mu) Example 3 5543.25 Example 4 5437.36 Comparative Example 1 4889.26 Comparative Example 2 4675.15 Control group 4317.64

[0073] By analyzing Table 6, it can be seen that the biomass graphene quantum dots in the fruit and vegetable additive of the present invention have good light absorption capacity, water absorption capacity and activation capacity of absorbing CO2 molecules. It can broaden the light absorption range during plant photosynthesis, regulate the transportation and distribution of plant carbohydrates, and ultimately achieve increased production of cabbage, among which the additive prepared in Example 3 has the most obvious effect on increasing the production of cabbage.

[0074] Tomato field experiment:

[0075] A tomato test field in Zhong'an Town, Chaohu District, Hefei City, Anhui Province was selected, and the test was divided into 5 groups, each group of 3 mu, and three repeated tests were set for each group. The additives prepared in Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were applied respectively, and the fifth group was the control group without any treatment. After harvest, the average yield per mu was recorded;

[0076] Table 7, tomato yield per mu experimental results

[0077] Group Average yield per mu (kg / mu) Example 3 6827.59 Example 4 6756.48 Comparative Example 1 6185.67 Comparative Example 2 5945.33 Control group 5648.29

[0078] By analyzing Table 6, it can be seen that the biomass graphene quantum dots in the fruit and vegetable additive of the present invention have good light absorption capacity, water absorption capacity and activation ability of absorbing CO2 molecules, which can broaden the light absorption range of plants during photosynthesis, regulate the transportation and distribution of plant carbohydrates, and ultimately achieve increased tomato production. Among them, the additive prepared in Example 3 has the most obvious effect on increasing tomato production.

[0079] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A biomass graphene additive for increasing the yield of fruits and vegetables, characterized in that: The invention is composed of the following percentage ingredients: 5-10% biomass graphene quantum dots, 10-15% urea, 2-5% calcium dihydrogen phosphate, 2-5% potassium chloride, 2-5% seaweed extract, 2-5% sodium selenite, 1-3% indoleacetic acid, 1-3% EDTA chelated zinc, 1-3% EDDHA chelated iron, 1-3% EDTA-Cu-6 and the balance water; The method for preparing biomass graphene quantum dots comprises the following steps: A1: Collect organic agricultural waste, add it to the cleaning pool and wash it with clean water for 2-3 times, transfer it to the dryer after washing, adjust the dryer temperature to 55-65℃ and dry it for 1-2 days, transfer it to the crusher after drying, and crush the organic agricultural waste into organic agricultural waste particles with a particle size of 3-5cm; A2: Transfer the treated organic agricultural waste particles to the pyrolysis furnace, add metal catalysts, control the heating rate, heat up 500℃ every 1h, open the air inlet valve, connect the air inlet valve to the nitrogen generator, use the vacuum pump to pump the pyrolysis furnace pressure to 0.4-0.6atm, open the air inlet valve every 30min during the pyrolysis process, connect the air inlet valve to the vacuum pump and control the pyrolysis furnace pressure to maintain at 0.4-0.6atm, open the air inlet valve for 3-5min, heat up to 2160-2240℃, and end the heating process after 5-10h of pyrolysis; A3: After the pyrolysis is completed, the air inlet valve is fully opened and a 20-30°C nitrogen gas flow is used to cool the entire pyrolysis furnace. The cooling time is 15-30 minutes to quickly cool the product in the pyrolysis furnace to 25°C. A4: Collect the agricultural waste particles after pyrolysis, transfer them to a vibrating separation screen with a vibration amplitude of 300-400rpm, and vibrate to separate the graphene particles and pyrolysis residue for 1-2h. Collect the separated graphene and transfer it to a grinder, grind it for 1-2h to obtain graphene particles; A5: Add graphene particles to hydrochloric acid, adjust the separation temperature to 45-60°C, adjust the speed of the magnetic stirrer to 600-800rpm, and perform acid hydrolysis for 60-90min to remove metal oxides and organic waste in the graphene particles; A6: Transfer the acid-hydrolyzed graphene particles to a reactor, add sodium tetraborate and purified water to the reactor, adjust the reaction temperature to 45-60°C, adjust the speed of the magnetic stirrer to 600-800 rpm, react for 60-90 minutes, and reduce the carboxyl and hydroxyl functional groups contained in the graphene particles; A7: Transfer the reduced graphene particles to a dryer, adjust the drying temperature to 55-65°C, the wind speed to 1.5-2m / s, and dry for 24 hours to obtain biomass graphene quantum dots.

2. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The metal catalyst in step A2 is Ca 2+ Add EDTA in a 1:1 ratio to pure ethanol solution and stir, then adjust n(Ca 2+ ):n(EDTA):n(Mn 2+ ): n(Cu 2+ ) = 1:1:1:1 ratio of Mn 2+ , Cu 2+ The product is obtained by ultrasonic dispersion until completely dissolved and then baking, calcining and drying in a muffle furnace.

3. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: In step A5, the mass ratio of graphene particles to hydrochloric acid is 1:5, wherein the hydrochloric acid is a 6% HCl aqueous solution.

4. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The mass ratio of the graphene particles and sodium tetraborate after acid hydrolysis in step A6 is 1:6, wherein the sodium tetraborate is sodium tetraborate decahydrate.

5. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The seaweed extract is a water-soluble seaweed extract with a specification of 10:

1.

6. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The EDTA-Cu-6 is fully soluble copper.

7. The biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The sodium selenite is water-soluble feed protein sodium selenite, and the specification is 45%.

8. The method for preparing a biomass graphene additive for increasing the yield of fruits and vegetables according to claim 1, characterized in that: The following steps are involved: B1: Add biomass graphene quantum dots, EDTA chelated zinc, EDDHA chelated iron and EDTA-Cu-6 to a stirrer, turn on the stirrer, adjust the stirrer temperature to 45-60°C, set the stirrer speed to 600-800rpm, mix for 30min, transfer to a homogenizer, and homogenize for 45-60min to obtain product A; B2: urea, calcium dihydrogen phosphate, potassium chloride, seaweed extract, sodium selenite and indoleacetic acid were mixed and added into a stirrer, the stirrer was turned on, the stirrer temperature was adjusted to 45-60°C, the stirrer speed was set to 600-800 rpm, and the mixture was mixed for 30 minutes, then transferred to a homogenizer and homogenized for 45-60 minutes to obtain product B; B3: Mix product A and product B and add them into a stirrer, add purified water, adjust the stirrer speed to 1000-1200 rpm, raise the temperature to 65-80° C., and stir for 30-60 min to obtain a biomass graphene additive for increasing fruit and vegetable production.

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