Fruit setting agent as well as preparation method and application thereof

Abstract

The invention provides a fruit setting agent and a preparation method and application thereof, and belongs to the technical field of plant planting. The invention provides a fruit setting agent. The fruit setting agent comprises gibberellin, boron and chloromethylsilazane. The gibberellin can realize parthenocarpy, the boron has the effects of improving the fruit setting rate and the fruit expansion, and the chloromethylsilatrane has the effects of increasing mitosis, promoting fruit expansion and improving the yield. According to the fruit setting agent, the fruit setting rate of blueberries is increased to 95%-98% or above, the fruit setting rate and yield are guaranteed, and the fruit quality, taste, hardness and storage resistance are also remarkably improved; when the fruit setting agent is sprayed in the flowering period, bee pollination is not affected, fruits sprayed with the fruit setting agent in the same period can expand at the same time, batch maturation of blueberry fruits is achieved to the maximum extent, and fruit bunching harvesting can be achieved. The fruit setting agent provided by the invention provides a technical guarantee for the production targets of high yield, stable yield and high-quality fruits of blueberries.

Description

Technical Field

[0001] This invention belongs to the field of plant cultivation technology, specifically relating to a fruit-setting agent, its preparation method, and its application. Background Technology

[0002] In recent years, China's greenhouse blueberry industry has developed rapidly, with many new and improved varieties. Blueberry yield and quality are directly related to the fruit set rate and quality during the flowering period. In production, blueberry pollination during the flowering period is mainly carried out by bees and bumblebees, and under normal circumstances, the fruit set rate is high, meeting production needs. However, some varieties, such as 'Eureka', have low fruit set rates due to bee pollination, leading to low yields. Greenhouse blueberries are produced off-season; if there is continuous cloudy, rainy, or snowy weather during the blueberry flowering period, it severely affects bee pollination, resulting in low fruit set rates, sometimes less than 30%. This leads to low blueberry yield and quality, causing economic losses. Summary of the Invention

[0003] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a fruit-setting agent that can help improve the fruit setting rate, yield and quality of blueberries, and provide technical support for the goal of high-yield, stable and high-quality blueberry production.

[0004] The objective of this invention is achieved through the following technical solution: The present invention provides a fruit-setting agent comprising: gibberellin 30-75 ppm, boron 65-120 ppm and silicone ring 62-100 ppm.

[0005] Preferably, the fruit-setting agent comprises: gibberellin 40-50 ppm, boron 75-90 ppm and silicone 62.5-80 ppm.

[0006] Preferably, the fruit-setting agent uses water as a solvent.

[0007] This invention provides a method for preparing the fruit-setting agent described in the above-mentioned technical solution, comprising: A gibberellin solution was prepared, and then boron and silicon cyclic rings were diluted to the required concentration using the gibberellin solution to obtain a fruit-setting agent.

[0008] Preferably, the preparation of the gibberellin solution includes: mixing gibberellin with a co-solvent, and then mixing it with water.

[0009] This invention provides the application of the fruit-setting agent described in the above technical solution or the fruit-setting agent prepared by the preparation method described in the above technical solution in blueberry cultivation.

[0010] Preferably, the application includes at least one of the following: (1) Increase blueberry yield; (2) Improve blueberry quality; (3) Improve the blueberry ripening period; (4) Promotes fruit enlargement; (5) Improve fruit setting rate; (6) Promotes the elongation of the inflorescence spike and / or pedicel; (7) Promotes corolla abscission; (8) Reduce the incidence of blueberry diseases.

[0011] This invention provides a method for using the fruit-setting agent described in the above-mentioned technical solution or the fruit-setting agent prepared by the preparation method described in the above-mentioned technical solution, comprising: The fruit-setting agent is sprayed during the blueberry flowering period.

[0012] Preferably, the fruit-setting agent is sprayed directly onto the corolla and / or stigma, once every 5 to 7 days.

[0013] Preferably, when the fruit-setting agent is sprayed, the nozzle is positioned directly in front of the corolla at a height of 5-8 cm, spraying directly at the stigma inside the corolla, and remaining for 2-3 seconds or repeating twice.

[0014] The beneficial effects of this invention are: This invention provides a fruit-setting agent comprising: gibberellin 30-75 ppm, boron 65-120 ppm, and silicone ring 62-100 ppm. The gibberellin enables parthenocarpy, boron improves fruit set rate and fruit enlargement, and the silicone ring increases mitosis, fruit enlargement, and yield. This invention optimizes the combination of these three reagents, determines the standard formulation of the blueberry fruit-setting agent through spraying experiments at different concentrations, and conducts batch spraying experiments on different varieties, finally establishing the technical standard for the blueberry fruit-setting agent formulation. This fruit-setting agent solves the problem of low fruit set rate in bee-pollinated varieties such as 'Eureka', increasing the fruit set rate to over 95%-98% after spraying, achieving the yield target. The fruit-setting agent also solves the problem of normal bee-pollinated varieties failing to pollinate due to weather conditions. This invention assists in the manual spraying of the fruit-setting agent during the fruit-setting period, ensuring fruit setting rate and yield. Spraying the fruit-setting agent also promotes fruit enlargement and increases yield, significantly improving fruit quality, taste, firmness, and storage resistance. Spraying this fruit-setting agent during flowering does not affect bee pollination; fruits sprayed simultaneously can enlarge at the same time, maximizing batch ripening of blueberries and enabling "bundled" harvesting. Simultaneously, spraying the fruit-setting agent can increase the corolla drop rate of bee-pollinated varieties such as 'Eureka' and 'L25' by over 80%, saving on manual "flower picking" costs and effectively preventing gray mold. Furthermore, this invention establishes a method for the preparation and application of the fruit-setting agent, forming a complete technical system, achieving technical standardization and operational procedures, and providing technical support for the goal of high-yield, stable, and high-quality blueberry production. Detailed Implementation

[0015] The present invention provides a fruit-setting agent comprising: gibberellin 30-75 ppm, boron 65-120 ppm and silicone ring 62-100 ppm.

[0016] Unless otherwise specified, the present invention does not have any special limitations on the source of raw materials for the following technical solutions, and any conventional source in the field may be used.

[0017] In this invention, the fruit-setting agent can be prepared using water as a solvent.

[0018] As an optional embodiment of the present invention, the mass fraction of gibberellin in the fruit-setting agent can be 30-75 ppm, 40-50 ppm, or 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, or 75 ppm. In this invention, the gibberellin can achieve parthenocarpy, thereby improving the fruit setting rate. The present invention does not specifically limit the source of the gibberellin; any commercially available product in the art can be used. In this embodiment, gibberellin with an effective ingredient content of 75% purchased from Shanghai Tongrui Biotechnology Co., Ltd. is used as an example.

[0019] As an optional embodiment of the present invention, the mass fraction of boron in the fruit-setting agent can be 65-120 ppm, or it can be 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, or 120 ppm. In the present invention, the boron has the effect of improving the fruit setting rate and promoting fruit enlargement. This invention does not have a specific limitation on the source of the boron; any commercially available product conventional in the art can be used. In the embodiments of this invention, the boron was purchased from Aigef. ® The following explanation uses liquid boron with an effective boron content of 150 g / L as an example.

[0020] As an optional embodiment of the present invention, the mass fraction of silicone ring in the fruit-setting agent can be 62-100 ppm, or 62, 62.5, 63, 63.5, 64, 64.5, 65, 65.5, 66, 66.5, 66.7, 67, 68, 69, 70, 71, 72, 75, 80, 85, 90, 95, or 100 ppm. In the present invention, the silicone ring has the effects of increasing mitosis, promoting fruit enlargement, and increasing yield. In the present invention, the silicone ring is preferably a water-soluble silicone ring preparation. The present invention does not have a special limitation on the source of the silicone ring, and conventional commercially available products in the art can be used. In the embodiments of the present invention, a silicone ring preparation with an effective ingredient content of 50% purchased from Liaoning Shanshui Yinong Technology Co., Ltd. is used as an example for illustration.

[0021] The fruit-setting agent provided by this invention has undergone experiments with three reagents and combinations. Gibberellin can achieve parthenocarpy, i.e., it can improve the fruit setting rate. Moreover, with the increase of different concentrations (30ppm, 40ppm, 50ppm, 75ppm), the fruit setting rate and fruit enlargement speed are positively correlated. Silica-rich ring has an auxiliary fruit setting effect, especially in promoting fruit enlargement and improving fruit quality. Boron also has the effect of improving fruit setting rate and promoting fruit enlargement. Through experiments with different varieties, the most suitable combination for the fruit-setting agent was determined to be: 40-50ppm gibberellin, 1500-2000 times diluted liquid boron, and 7500-8000 times diluted silica-rich ring, which can be applied to most blueberry flowering periods. The described fruit-setting agent increases the blueberry fruit-setting rate to over 95%~98%, ensuring both fruit setting rate and yield. Fruit quality, taste, firmness, and storage life are also significantly improved. This fruit-setting agent does not affect bee pollination when sprayed during the flowering period, and fruits sprayed simultaneously can expand at the same time, maximizing the batch ripening of blueberries and enabling "bundled" harvesting. The fruit-setting agent provided by this invention provides technical support for achieving high-yield, stable-yield, and high-quality blueberry production.

[0022] The present invention provides a method for preparing the fruit-setting agent described in the above technical solution, comprising: preparing a gibberellin solution, and then using the gibberellin solution to dilute boron and silicon cyclic rings to the required concentration to obtain the fruit-setting agent.

[0023] As an optional embodiment of the present invention, the preparation of the gibberellin solution includes: mixing gibberellin with a co-solvent, and then mixing with water. In the present invention, the co-solvent can be a 75% aqueous ethanol solution. After obtaining the gibberellin solution, the present invention adds the boron and silica-rich ring to the gibberellin solution, wherein the amount of boron and silica-rich ring is sufficient to achieve the desired mass fraction.

[0024] This invention provides the application of the fruit-setting agent described in the above-described technical solution or the fruit-setting agent prepared by the preparation method described in the above-described technical solution in blueberry cultivation. As an optional embodiment of this invention, the application includes at least one of the following: (1) increasing blueberry yield; (2) improving blueberry quality; (3) improving blueberry ripening period; (4) promoting fruit enlargement; (5) increasing fruit set rate; (6) promoting inflorescence and / or pedicel elongation; (7) promoting corolla abscission; (8) reducing the incidence of blueberry diseases. In this invention, improving blueberry quality includes improving blueberry quality and / or increasing blueberry fruit diameter. The blueberry diseases include blueberry gray mold. The results of the embodiments of this invention show that the use of the fruit-setting agent can significantly promote fruit enlargement, improve the blueberry ripening period, make the blueberry ripening period more concentrated, increase the blueberry fruit set rate, and increase the blueberry fruit diameter, thereby achieving the effects of increasing blueberry yield and improving blueberry quality.

[0025] This invention provides a method for using the fruit-setting agent described in the above-mentioned technical solution or the fruit-setting agent prepared by the preparation method described in the above-mentioned technical solution, comprising: spraying the fruit-setting agent during the blueberry flowering period. As an optional embodiment of this invention, the fruit-setting agent can be sprayed from the moment of flowering, or the first spray can be started when the flowering volume reaches approximately 5%. The main consideration in this invention is to save on pesticides by spraying the fruit-setting agent during flowering. Spraying the fruit-setting agent at other times or on other organs will not have an adverse effect on the blueberry. Furthermore, the fruit-setting agent also promotes flower development and inflorescence elongation. In this invention, the fruit-setting agent can be sprayed directly onto the corolla and / or stigma, once every 5-7 days, or the interval can be 6 days. This invention does not have a specific limitation on the number of sprays; the number of sprays can be determined based on the blueberry variety, the blueberry flower opening habits, the number of flowers, and the pollination and fruit-setting time after flowering of a single flower, combined with practical verification in production. In this invention, the spraying can be 3-5 times, or even 4 times. When spraying the fruit-setting agent according to this invention, the nozzle is positioned directly in front of the corolla, at a height of 5-8 cm, spraying directly onto the stigma inside the corolla, holding for 2-3 seconds or repeating twice. This spraying method ensures that the fruit-setting agent is sprayed onto the stigma and adheres to it, guaranteeing a high fruit set rate. In practice, this invention has found that if spraying is too rapid, resulting in insufficient dosage on the stigma, the fruit set rate will be significantly reduced, leading to fruit set failure. As an optional embodiment of this invention, the spraying time of the fruit-setting agent can be any time between 9:00 and 15:00; the spraying temperature can be 18-26℃, or 18, 19, 20, 21, 22, 23, 24, 25, or 26℃; spraying is preferably carried out on a sunny day.

[0026] In blueberry cultivation and production, this invention enables the implementation of flower-promoting pruning techniques and dormancy-breaking techniques, ensuring a relatively concentrated flowering period, reducing the number of spraying applications, and facilitating the application of fruit-setting agents.

[0027] The fruit-setting agent described in this invention has no effect on bees, bumblebees, or other similar insects. Therefore, in the production of bee-pollinated fruit-setting varieties, the fruit-setting agent can be sprayed once during the full bloom period, or sprayed on cloudy or rainy days during the flowering period in greenhouse production. This can improve the fruit setting rate, promote fruit enlargement, and increase yield.

[0028] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0029] The gibberellin used in the following technical solutions was sourced from Shanghai Tongrui Biotechnology Co., Ltd., with an active ingredient content of 75%; the liquid boron had an active ingredient content of 150 g / L and was purchased from Aigefu. ® Boron; the active ingredient content of silicon-rich ring is 50%, purchased from Liaoning Shanshui Yinong Technology Co., Ltd.

[0030] Example 1 A fruit-setting agent, using water as a solvent, comprises: 50 ppm gibberellin, 75 ppm liquid boron, and 66.7 ppm silicone rings.

[0031] The preparation method of the fruit-setting agent is as follows: Mix 1g of gibberellin with 20mL of 75% alcohol in a container, then add water at 20~25℃ to prepare a 50ppm gibberellin aqueous solution. Add liquid boron to dilute the liquid boron (active ingredient content of 150g / L) by 2000 times. Then add silicone (active ingredient content of 50%) to dilute the silicone by 7500 times to obtain the fruit-setting agent.

[0032] Example 2 A fruit-setting agent, using water as a solvent, comprises: 40 ppm gibberellin, 75 ppm liquid boron, and 66.7 ppm silicone rings.

[0033] The preparation method of the fruit-setting agent is as follows: Mix 1g of gibberellin with 20mL of 75% alcohol in a container, then add water at 20-25℃ to prepare a 40ppm gibberellin aqueous solution. Add liquid boron (active ingredient content of 150g / L) and dilute it 2000 times. Then add silicone (active ingredient content of 50%) and dilute it 7500 times to obtain the fruit-setting agent.

[0034] Example 3 A fruit-setting agent, using water as a solvent, comprises: 50 ppm gibberellin, 100 ppm liquid boron, and 66.7 ppm silicone rings.

[0035] The preparation method of the fruit-setting agent is as follows: Mix 1g of gibberellin with 20mL of 75% alcohol in a container, then add water at 20-25℃ to prepare a 50ppm gibberellin aqueous solution. Add liquid boron (active ingredient content of 150g / L) to dilute it 1500 times. Then add silicone (active ingredient content of 50%) to dilute it 7500 times to obtain the fruit-setting agent.

[0036] Application Example 1 1. Instructions for application of fruit-setting agents The dosage of the fruit-setting agent should be prepared according to the number of flowers. The fruit-setting agent must be prepared and used immediately, and should not be stored for more than 4 hours.

[0037] (1) Spraying tools: Electric special pollinator or general electric sprayer (select atomizing flower pollination nozzle) can be used, with on / off function to ensure spraying effect and accurate spraying.

[0038] (2) Spraying targets and operational requirements: Spray only on flowering corollas; avoid spraying unflowered corollas as much as possible (mainly to save on pesticides). Even if sprayed on other organs, it will not have a harmful effect. On the contrary, the components in the fruit-setting agent promote flower development and spike elongation. When spraying, hold the nozzle directly in front of the corolla at a height of about 5-8 cm, spraying directly onto the stigma inside the corolla, holding for 2-3 seconds or repeating twice to ensure that the pesticide is sprayed onto the stigma and that the amount of pesticide adhering to the stigma is sufficient, thus ensuring the fruit setting rate. Practice has shown that if the spraying is too fast, i.e., the amount of pesticide adhering to the stigma is insufficient, it will greatly reduce the fruit setting rate, leading to fruit setting failure.

[0039] (3) Spraying time: Generally, it can be carried out at 9:00~15:00 and the temperature is 18~26℃. Spraying on a sunny day is the best.

[0040] (4) Spraying frequency: The first spray should be started when the flowering rate reaches about 5%. Based on the blueberry flower opening habits, the number of flowers, and the pollination and fruit setting time of individual flowers, combined with production practice verification, spray once every 5 to 7 days according to the flowering rate, and continue until the end of the flowering period or the producer's desired target. Different varieties have different flowering periods, and the number of sprays will vary. Generally, 3 to 5 times is sufficient. In blueberry cultivation and production, flower-promoting pruning techniques and dormancy-breaking techniques can be implemented to ensure a relatively concentrated flowering period, reduce the number of sprays, and facilitate the implementation of fruit-setting agents.

[0041] (5) Practice has proven that the fruit-setting agent provided by this invention has no effect on bees, bumblebees, etc. Therefore, in the production of bee-pollinated fruit-setting varieties, the fruit-setting agent can be sprayed once during the full bloom period, or sprayed on cloudy or rainy days during the flowering period in greenhouse production, which has the effects of improving the fruit setting rate, promoting fruit enlargement, and increasing yield.

[0042] 2. Effects of fruit-setting agents (1) Experimental group: Eurica (Liaoning Provincial Fruit Tree Research Institute): From January 6th to January 19th, 2025, the fruit-setting agent of Example 1 was sprayed once every 5-7 days, for a total of 3 sprays of the fruit-setting agent (50ppm gibberellin + liquid boron diluted 2000 times + silicon-rich ring diluted 7500 times). After each spraying, the fruit began to swell 4-5 days later, and the fruit setting rate reached more than 98%. The fruit set, swelled and matured in batches. Harvesting began on March 15th, 2025, and was carried out every 7-10 days, for a total of 4 harvests, which were completed on April 15th. The ripening period was concentrated. "Bundled fruit" harvesting was achieved, with the fruit diameter mainly at 18-20mm, reaching more than 80%. The fruit was hard, crisp and sweet, with excellent quality. The average yield of 6-year-old blueberries was 14.5 catties per plant, and the highest yield per plant was 17.8 catties.

[0043] Control treatment: Eurica (Liaoning Provincial Fruit Tree Research Institute) did not receive fruit-setting agent spraying during the same period as the experimental group. Bees were used for pollination, with approximately 6000 bees placed in the experimental space (1 hive per 0.7 mu). The fruit set rate was 33.5% during the same period as the experimental group. The average yield per 6-year-old blueberry plant was 3.8 jin. Fruit size varied greatly, with approximately 50% of fruits having a diameter of 18-20 mm, and 30-40% having a diameter of 13-15 mm. The ripening period was not concentrated, with a harvest period of up to 55 days. The fruit was relatively soft, with a thin bloom, and of poor quality.

[0044] Experimental observations showed that spraying fruit-setting agents can extend the fruit harvest period, allowing mature fruits to remain on the tree for up to 20 days without spoiling, while maintaining good firmness and taste.

[0045] In the experimental group, the average weight of blueberries with stems of 18-20 mm was 3.52 g; in the control group, the average weight of blueberries with stems of 18-20 mm was 3.18 g. Therefore, the fruit-setting agent treatment in the experimental group increased the weight of individual fruits by 10%-20% compared to the control.

[0046] During the above-mentioned experimental and control treatments, it was found that spraying the fruit-setting agent promoted the elongation of flower (fruit) pedicels better than bee pollination, resulting in thicker pedicels and flower spikes that were 1-2 cm longer than the control. It also promoted flower development, with the flowering period of a single spike occurring 5-7 days earlier than the control.

[0047] (2) Experimental group: Eurica (Wangbao Town, Suizhong County, Liaoning Province): The fruit-setting agent of Example 2 was sprayed from the beginning of flowering in early January 2024, with an interval of 5-7 days, for a total of 5 sprays of the fruit-setting agent (40ppm gibberellin + liquid boron diluted 2000 times + silicon-rich ring diluted 7500 times). The fruit began to swell 4-5 days after each spray, and the fruit setting rate reached more than 95%. The fruit swelled in batches, matured in a concentrated period, and the harvest period was 30 days. The fruit was large, with a diameter of 20-22mm reaching more than 85%, and the fruit quality was good. The average yield of 5-year-old blueberries was 12.1 catties per plant.

[0048] Control treatment: Eurica (Wangbao Town, Suizhong County, Liaoning Province): During the same period as the experimental group, no fruit-setting agent was applied. Pollination was performed using two hives of bees (approximately 6000 bees per hive) and one hive of bumblebees (approximately 100 bumblebees per hive) in a 1.5-mu greenhouse. Fruit set rate was 40.1%, with slow fruit enlargement, uneven ripening, and a harvest period of up to 60 days. Fruit size varied greatly, with approximately 15% of fruits exceeding 20mm in diameter, while small fruits (13-15mm) accounted for the majority (50-60%). The yield per plant was 3.5 jin (approximately 1.25 catties).

[0049] (3) Experimental group: Yuruika (Dengshahe Town, Dalian City, Liaoning Province): The fruit-setting agent of Example 3 was sprayed from the beginning of flowering in early January 2025, with an interval of 5-7 days between sprays, for a total of 4 sprays of the fruit-setting agent (50ppm gibberellin + liquid boron diluted 1500 times + silicon-rich ring diluted 7500 times). The fruit setting rate reached more than 95%, the maturity period was concentrated, the harvest period was 32 days, the fruit diameter of 18-20mm reached more than 80%, there were few small fruits, and the fruit firmness and quality were excellent. The average yield of 3-year-old trees was 6.2 jin per tree.

[0050] Control treatment: Eureka (Dengshahe Town, Dalian City, Liaoning Province): No fruit-setting agent was sprayed during the same period as the experimental group. One hive of bumblebees and one hive of honeybees were placed per mu for pollination. The fruit setting rate was 40.2%. The ripening period was not concentrated, and the harvest period lasted 65 days. There was a large difference in fruit size. About 10% of the fruits were large with a diameter of more than 20 mm, while about 60% were small fruits with a diameter of 13-15 mm. The average yield of 3-year-old plants was 2.2 jin.

[0051] (4) Experimental Group: Eurica (Mingshui Township, Suizhong County, Liaoning Province): The fruit-setting agent of Example 1 was sprayed from the beginning of flowering in early January 2025, with an interval of 5-7 days between sprays, for a total of 5 sprays of the fruit-setting agent (50ppm gibberellin + liquid boron diluted 2000 times + silicon-rich ring diluted 7500 times). The fruit setting rate reached more than 95%, the maturity period was relatively concentrated, and the harvest period was 40 days. The fruit was large, with the main fruit diameter being more than 20mm, about 75% and the small fruit of 13-15mm, about 5%. The average yield of 4-year-old plants was 10.2 jin.

[0052] Control treatment: Eurica (Mingshui Township, Suizhong County, Liaoning Province): No fruit-setting agent was sprayed during the same period as the experimental group. One hive of bumblebees and one hive of honeybees were placed per mu for pollination. The fruit setting rate was 40.5%, the maturity period was not concentrated, the harvest period was 70 days, the fruit size varied greatly, with large fruits (over 20mm in diameter) accounting for about 10%, and small fruits (13-15mm in diameter) accounting for about 65%. The maturity period was not concentrated, the harvest period was 65 days, and the yield per plant was 4.8 jin.

[0053] Application Example 2 1. The application method of the fruit-setting agent is the same as in application example 1.

[0054] 2. The fruit-setting agent of Example 1 was used to treat 'Legosie' blueberries. The results showed that the fruit setting rate of blueberries was 98.8%, and the fruit size was mainly 17-18 mm, reaching more than 80%.

[0055] 3. The fruit-setting agent of Example 1 was used to treat 'O'Neill' blueberries. The results showed that the fruit setting rate of blueberries was 98.2%, and the fruit size was mainly 17-18 mm, reaching more than 80%.

[0056] Application Example 3 1. Use 75 ppm gibberellin alone as a fruit-setting agent, and apply it in the same way as in Application Example 1.

[0057] 2. 75 ppm gibberellin was used as a fruit-setting agent to treat 'Legosie' blueberries. The result was a fruit setting rate of 96.5%, but the fruits did not swell after setting, resulting in a large number of 'stunted' fruits.

[0058] 3. 75 ppm gibberellin was used as a fruit-setting agent to treat 'O'Neill' blueberries. The result was a fruit setting rate of 96%, but the fruits did not swell after setting, resulting in a large number of 'stunted' fruits.

[0059] Application Example 4 1. When using boron alone as a fruit-setting agent, dilute liquid boron 2000 times before application; the application method is the same as in application example 1.

[0060] 2. When using liquid boron diluted 2000 times as a fruit-setting agent for 'Eureka' varietal, the fruit set rate was only 2%~3%. Simultaneously, in a control group without fruit-setting agent application and naturally pollinated, the fruit set rate was approximately 2%. There was no significant difference in fruit set rate between the control group using boron alone as a fruit-setting agent and the control group without any fruit-setting agent application.

[0061] Application Example 5 1. Use Silaflon alone as a fruit-setting agent; dilute Silaflon 7500 times and apply it, using the same method as in Application Example 1.

[0062] 2. When using a 7500-fold diluted siloxane as a fruit-setting agent for 'Eureka' varietal, the fruit set rate was only 2%–3%. In a control group that was naturally pollinated without any fruit-setting agent, the fruit set rate was approximately 2%. There was no significant difference in fruit set rate between the control group using siloxane alone and the control group without any fruit-setting agent.

[0063] 3. During the fruit enlargement period, spraying 7500 times diluted SiFenghuan on fruits that do not enlarge (stiff fruits) can enable 30% to 50% of the 'stiff fruits' to enlarge, with the fruit diameter mostly distributed between 8 and 13 mm.

[0064] Application Example 6 Using boron and silicon-rich ring as fruit-setting agents; spraying with boron at 1500-2000 times dilution + silicon-rich ring at 7500-8000 times dilution during the flowering period resulted in a fruit setting rate of 2-3%, which was no different from not spraying. This indicates that the combination of the two agents does not improve the fruit setting rate.

[0065] Comparative Example 1 A fruit-setting agent, the same as in Example 1, except that the concentration of gibberellin is 20 ppm.

[0066] The fruit setting effect of 'Eureka' was verified using the fruit setting agent of Comparative Example 1, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate was statistically analyzed, and the fruit setting rate was 70.2%. Some fruits did not expand and were relatively small.

[0067] Comparative Example 2 A fruit-setting agent, the same as in Example 1, except that the concentration of gibberellin is 80 ppm.

[0068] The fruit setting effect of 'Eureka' was verified using the fruit setting agent of Comparative Example 2, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate was statistically analyzed and found to be about 90%, which was not much different from the fruit setting rate of test group (1) in Application Example 1, but it affected the fruit shape. The blueberries were elongated longitudinally and grew into long fruits.

[0069] Comparative Example 3 A fruit-setting agent, the same as in Example 1, except that the concentration of liquid boron is 50 ppm.

[0070] The fruit setting effect of 'Eureka' was verified using the fruit setting agent of Comparative Example 3, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate was statistically analyzed and found to be about 90%, which was not much different from the fruit setting rate of test group (1) in Application Example 1, but the fruit expansion was uneven.

[0071] Example 4 A fruit-setting agent, the same as in Example 1, except that the concentration of liquid boron is 120 ppm.

[0072] The fruit-setting effect of 'Eureka' was verified using the fruit-setting agent of Example 4, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate and fruit growth were statistically analyzed, and there was no significant difference between the fruit setting rate and fruit growth and test group (1) in Application Example 1.

[0073] Comparative Example 4 A fruit-setting agent, the same as in Example 1, except that the concentration of the silicone ring is 50 ppm.

[0074] The fruit setting effect of 'Eureka' was verified using the fruit setting agent of Comparative Example 4, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate was statistically analyzed. The fruit setting rate was not significantly different from that of test group (1) in Application Example 1. The fruit expansion rate was slow and the fruit was small (mainly medium-sized fruit with a diameter of 16~18mm, accounting for about 52.5%, and the remaining fruit with a diameter of less than 16mm).

[0075] Example 5 A fruit-setting agent, the same as in Example 1, except that the concentration of the silicone ring is 80 ppm.

[0076] The fruit-setting effect of 'Eureka' was verified using the fruit-setting agent of Example 5, and the specific method was the same as that of test group (1) in Application Example 1. During the period, the fruit setting rate and fruit size were statistically analyzed. The fruit setting rate was not significantly different from that of test group (1) in Application Example 1. The fruit expansion rate was fast, and the fruit size was not significantly different from that of test group (1) in Application Example 1.

[0077] Application Example 7 In 2024 and 2025, the fruit-setting agent of Example 1 was used to treat blueberry 'Eureka' and blueberry 'L25', respectively, and the application method of the fruit-setting agent was the same as in Application Example 1.

[0078] Meanwhile, the blueberry 'Eureka' and blueberry 'L25' were treated using the control treatment method in Application Example 1 (1).

[0079] Flower drop rate during flowering period: For the 'L25' variety, the flower drop rates during flowering period in 2024 and 2025 were 82.5% and 85.6% respectively after spraying with fruit-setting agent; the control rates were 25.6% and 30.5%. For 'Eureka', the flower drop rates after spraying with fruit-setting agent in 2024 and 2025 were 81.5% and 86.6% respectively.

[0080] Application Example 8 In 2024 and 2025, the fruit-setting agent of Example 1 was used to treat blueberry 'Eureka', and the application method of the fruit-setting agent was the same as in Application Example 1.

[0081] Meanwhile, the blueberry 'Eureka' was treated using the control treatment method in Application Example 1 (1).

[0082] The incidence of gray mold during the growth period of blueberry 'Eureka' was investigated. The results showed that the incidence of gray mold in 'Eureka' after spraying with fruit-setting agent during the flowering period in 2024 and 2025 was 2.3% and 3.5%, respectively; while the control group had an incidence of 15.5% and 17.8%.

[0083] In general, the main component in the development of blueberry fruit-setting agents is gibberellin parthenocarpy, with boron and silica rings as necessary auxiliary agents. The dosage range of boron and silica rings is mainly based on both cost and effectiveness considerations, aiming to assist fruit setting and promote fruit enlargement. However, the gibberellin concentration should not be too high or too low. It can be 30-75 ppm, with 40-50 ppm being optimal. After trials on eight varieties, including northern and southern highbush, the effect was good and it can be applied to most varieties.

[0084] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A fruit setting agent, characterized by, The fruit setting agent comprises: GA3 30-75 ppm, boron 65-120 ppm and silicate 62-100 ppm.

2. The fruit setting agent according to claim 1, characterized in that, The fruit setting agent comprises:

3. The fruit setting agent according to claim 1 or 2, characterized in that, GA3 40-50 ppm, boron 75-90 ppm and silicate 62.5-80 ppm.

4. A method for preparing the fruit setting agent according to any one of claims 1 to 3, characterized in that, The fruit setting agent uses water as solvent. The fruit setting agent comprises:

5. The preparation method according to claim 4, characterized in that, GA3 solution is prepared, and then boron and silicate are diluted to the required concentration by using the GA3 solution to obtain the fruit setting agent. The preparation of GA3 solution comprises:

7. Use according to claim 6, characterized in that, GA3 is mixed with a cosolvent, and then mixed with water.

6. The use of the fruit setting agent of any one of claims 1-3 or the fruit setting agent prepared by the method of claim 4 or 5 in blueberry planting. The use comprises at least one of: (1) increasing the yield of blueberries; (2) improving the quality of blueberries; (3) improving the ripening period of blueberries; (4) promoting fruit enlargement; (5) increasing the fruit setting rate; (6) promoting the elongation of flower spikes and / or flower stalks; 8. The method for using the fruit setting agent according to any one of claims 1 to 3 or the fruit setting agent prepared by the method according to claim 4 or 5, wherein, (7) promoting the shedding of flower corolla; (8) reducing the incidence of diseases of blueberries.

9. The method of use of claim 8, wherein, The fruit setting agent is sprayed on the blueberry flowers.

10. The method of use of claim 8, wherein, The fruit setting agent is directly sprayed on the flower corolla and / or stigma, and the spraying is performed at intervals of 5-7 days. When the fruit setting agent is sprayed, the spraying head is directly in front of the flower corolla at a height of 5-8 cm, and the spraying is performed for 2-3 seconds or repeated twice.