Mepiquat chloride slow-release nanoemulsion as well as preparation method and application thereof

Abstract

The invention discloses a mepiquat chloride slow-release nanoemulsion as well as a preparation method and application thereof. The mepiquat chloride slow-release nanoemulsion is prepared from the following components in percentage by mass: 25% of mepiquat chloride, 0.05% of an organic silicon defoaming agent, 5 to 15% of APG0810 alkyl glycoside, 5 to 15% of AE0-9 fatty alcohol-polyoxyethylene ether, 8% of a film-forming agent and the balance of water. Researches show that compared with a 25% mepiquat chloride aqueous solution, the mepiquat chloride slow-release nanoemulsion provided by the invention can significantly improve the plant dwarfing regulation effect, and has a significant dwarfing effect on eucalyptus, moso bamboo, schima superba and conic.

Description

Technical Field

[0001] The invention belongs to the technical field of plant growth regulators, and specifically discloses a mepiquat sustained-release nanoemulsion and a preparation method and application thereof. Background Art

[0002] With the rapid development of power transmission and distribution network construction, the number of lines is increasing, and high-voltage transmission lines need to cross densely forested areas. When the clearance distance between the overhead line and the tree canopy is less than the critical air breakdown distance, a tree flashover fault will occur. At present, the problem of tree barrier hazards caused by super-high trees within the protection range of the line, which endangers the safe operation of overhead power lines, is becoming increasingly prominent, seriously endangering the safe operation of the power grid system. Economic trees such as eucalyptus and bamboo, and dominant tree species in nature reserves such as Schima superba and Cone grow rapidly, and are the main tree barrier hazards in South my country. Traditional obstacle removal uses manual climbing pruning or felling, which has the following disadvantages: 1. Manual climbing is required, and there are certain safety hazards in high-altitude operations, and there have been many accidents of people falling from high altitudes; 2. The labor cost has increased significantly, resulting in an increasing cost of manual obstacle removal; 3. Some hidden danger points are remote, with complex terrain, poor traffic, and difficult to reach; 4. Due to the growth of trees, the area of ​​tree barrier hazards is gradually expanding, but the inefficient manual obstacle removal efficiency cannot meet the current situation. Therefore, it is urgent to seek safe and effective alternatives. Gibberellic acid is an important hormone that controls plant growth. Its synthesis site is the part with vigorous growth, such as young shoots and tender leaves. By spraying exogenous mepiquat-chloride dwarfing agent on the leaves, the signal transduction pathway of the plant's own endogenous gibberellin synthesis can be blocked, inhibiting the synthesis of gibberellin, thereby slowing down the elongation of plant cells. However, the existing mepiquat-chloride dwarfing agent has a slightly weak effect on plants, and its dwarfing effect needs to be improved. Summary of the invention

[0003] The purpose of the present invention is to provide a novel mepiquat-chloride sustained-release nanoemulsion to address the shortcoming that the existing mepiquat-chloride dwarfing agent has a slightly weak dwarfing effect on plants, so as to achieve the purpose of significantly improving the dwarfing effect on plants.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A mepiquat sustained-release nanoemulsion comprises the following components in percentage by mass: mepiquat 25%, silicone defoamer 0.05%, APG0810 alkyl glycoside 5-15%, AE0-9 fatty alcohol polyoxyethylene ether 5-15%, film-forming agent 8%, and the balance water

[0006] Preferably, the mepiquat sustained-release nanoemulsion comprises the following components in percentage by mass: 25% mepiquat, 0.05% silicone defoamer, 10% APG0810 alkyl glycoside, 10% AE0-9 fatty alcohol polyoxyethylene ether, 8% film-forming agent, and the balance is water.

[0007] Preferably, the film former is Dow Filmier-17 film former.

[0008] The preparation method of the mepiquat sustained-release nanoemulsion of the present invention comprises the following steps:

[0009] First, pump 50%-60% of water into the feed kettle, then add mepiquat technical, stir until the solution is clear and transparent, then pump in APG0810 alkyl glycoside, AE0-9 fatty alcohol polyoxyethylene ether, add silicone defoamer and film-forming agent, then use the remaining water to clean the pipeline and stir until the solution is clear and transparent.

[0010] The present invention also provides application of the mepiquat-chloride sustained-release nanoemulsion in plant growth regulation.

[0011] Preferably, the plant growth regulation is plant dwarfing regulation.

[0012] Preferably, the mepiquat-chloride sustained-release nanoemulsion is used in the form of foliar spraying.

[0013] The present invention has the following beneficial effects:

[0014] Compared with the traditional dosage form of mepiquat, the mepiquat sustained-release nanoemulsion provided by the present invention can significantly improve the dwarfing regulation effect of plants. Compared with the clear water control group, the 25% mepiquat aqueous solution reduced the growth rate of eucalyptus, bamboo, Schima superba and cone plant height by 36.25%, 45.85%, 14.80% and 38.70%, respectively, while the mepiquat sustained-release nanoemulsion of the present invention reduced the growth rate of eucalyptus, bamboo, Schima superba and cone plant height by 59.87%, 60.31%, 44.39% and 63.48%, respectively. It can be seen that compared with the 25% mepiquat aqueous solution, the mepiquat sustained-release nanoemulsion of the present invention can further reduce the growth rate of the above-mentioned plants. DETAILED DESCRIPTION

[0015] The following examples are provided to further illustrate the present invention, rather than to limit the present invention.

[0016] Example 1

[0017] A mepiquat sustained-release nanoemulsion comprises the following components in percentage by mass: 25% of mepiquat, 0.05% of an organosilicon defoamer, 10% of APG0810 alkyl glycoside, 10% of AE0-9 fatty alcohol polyoxyethylene ether, 8% of a Dow Filmier-17 film former, and the balance is water.

[0018] Preparation method:

[0019] First, pump 50%-60% of water into the feed kettle, then add mepiquat technical, stir until the solution is clear and transparent, then pump in APG0810 alkyl glycoside, AE0-9 fatty alcohol polyoxyethylene ether, add silicone defoamer, Dow Filmier-17 film-forming agent, then use the remaining water to clean the pipeline and stir until the solution is clear and transparent.

[0020] Preliminary tests showed that the optimal dosage of mepiquat for eucalyptus and bamboo was 200 mg / L (25% mepiquat aqueous solution diluted 1250 times), and the optimal dosage for cone and Schima superba was 600 mg / L (25% mepiquat aqueous solution diluted 416.7 times) and 800 mg / L (25% mepiquat aqueous solution diluted 312.5 times), respectively. In order to investigate the dwarfing regulation effect of mepiquat sustained-release nanoemulsion on the above plants, a potted experiment was conducted. Seedlings of eucalyptus (average seedling height 103 cm), bamboo (average seedling height 236 cm), Schima superba (average seedling height 146 cm), and cone (average seedling height 117 cm) with basically the same specifications were selected. The potting medium was soil collected from subtropical forests in South China. Before the experiment, the soil was air-dried and crushed, and debris such as stones and roots were picked out, and sieved through a 2 cm sieve for use. A round non-woven bag with a diameter of 18 cm and a height of 20 cm was used for potting, and each pot was filled with 5.5 kg of air-dried soil. After 3 months of seedling acclimatization, the above-mentioned mepiquat-sustained-release nanoemulsion was taken for foliar spraying of the plants. At the same time, a control treatment of clean water and 25% mepiquat-sustained aqueous solution was set. The final concentration of each regulator treatment was the optimal dosage corresponding to each plant. A total of 3 treatments were set up, with 10 repetitions. Spray the medicine once on consecutive rainless days in midsummer, and the degree of foliar spraying was determined. The growth of the plants was investigated 60 days after spraying, and the results are shown in Table 1.

[0021] Table 1. Dwarfing effect of mepiquat on eucalyptus, bamboo, Schima superba, and cone

[0022]

[0023] * Change range (%) = (increase in treatment - increase in clear water control) / increase in clear water control * 100

[0024] The results in Table 1 show that under the same concentration conditions, conventional 25% mepiquat aqueous solution treatment can effectively inhibit the growth of eucalyptus, bamboo, Schima superba and cone plants, while the mepiquat sustained-release nanoemulsion of the present invention can further reduce the amount of height increase of the above plants.

[0025] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A mepiquat sustained-release nanoemulsion, characterized in that: The invention comprises the following components in percentage by mass: 25% of mepiquat, 0.05% of organosilicon defoamer, 5-15% of APG0810 alkyl glycoside, 5-15% of AE0-9 fatty alcohol polyoxyethylene ether, 8% of film-forming agent, and the balance is water.

2. The mepiquat sustained-release nanoemulsion according to claim 1, characterized in that The invention comprises the following components in percentage by mass: 25% of mepiquat, 0.05% of organosilicon defoamer, 10% of APG0810 alkyl glycoside, 10% of AE0-9 fatty alcohol polyoxyethylene ether, 8% of film-forming agent, and the balance is water.

3. The mepiquat sustained-release nanoemulsion according to claim 1, characterized in that: The film former is Dow Filmier-17 film former.

4. A method for preparing the mepiquat sustained-release nanoemulsion according to any one of claims 1 to 3, characterized in that: The following steps are involved: First, pump 50%-60% of water into the feed kettle, then add mepiquat technical, stir until the solution is clear and transparent, then pump in APG0810 alkyl glycoside, AE0-9 fatty alcohol polyoxyethylene ether, add silicone defoamer and film-forming agent, then use the remaining water to clean the pipeline and stir until the solution is clear and transparent.

5. Use of the mepiquat sustained-release nanoemulsion according to any one of claims 1 to 3 in regulating plant growth.

6. The use according to claim 5, characterized in that: The plant growth regulation is plant dwarfing regulation.

7. The use according to claim 5, characterized in that: The mepiquat sustained-release nanoemulsion is used in the form of foliar spraying.

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