Anti-transpiration agent and preparation method thereof

Abstract

An anti-transpiration agent comprises 100 parts by weight of various raw materials, and the specific parts by weight of each component are as follows: 3-10 parts of emulsified paraffin, 0.2-2 parts of polyacrylic acid, 1-10 parts of maltodextrin, 0.01-0.5 parts of wetting agent, 0.05-0.5 parts of antibacterial agent and the balance of deionized water. The invention also discloses a method for preparing an anti-transpiration agent. The invention utilizes maltodextrin to have excellent film-forming properties, and forms a transparent and soft film after spraying, which can significantly reduce the water loss of plants, but does not interfere with the growth or normal respiration of plants, and can be degraded by microorganisms to become low-molecular sugar alcohols for plant absorption.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to an anti-transpiration agent and a preparation method thereof. Background Art

[0002] Antitranspirants generally refer to a class of substances that act on the surface of plant leaves and can reduce transpiration intensity, but have little effect on photosynthesis and growth. Antitranspirants are not only a new type of drought-resistant technology, but also play an important role in drought resistance, water conservation, disaster reduction and production protection in agricultural production. They can also be used to improve the survival rate of plant cuttings and transplants, and prevent burns caused by direct sunlight in summer. Antitranspirants can be divided into three categories according to their different application mechanisms: film-type antitranspirants, reflective antitranspirants and metabolic antitranspirants. The active ingredient of film-type antitranspirants is an organic polymer compound, which forms a soft and smooth film on the leaf surface by spraying, greatly reducing the amount of water that diffuses into the air through the stomata; reflective antitranspirants can reflect part of the solar radiation energy by spraying on the upper surface of plant leaves, reduce the absorption of solar radiation by the leaves, thereby reducing the temperature of the leaves and reducing transpiration; metabolic antitranspirants can close the stomata or reduce the stomata opening, thereby increasing the stomatal transpiration resistance and inhibiting transpiration.

[0003] Conventional film-type anti-transpiration agents can not only increase the water potential of plant leaves and fruits, but also have good effects in increasing crop yields, improving plant transplanting and cutting survival rates, increasing temperature and moisture retention, resisting insect diseases, and improving plant resistance. They are more effective than the other two types of anti-transpiration agents in short-term drought conditions, so they are widely used in ornamental greening tree species, large tree transplanting, fruit, vegetable and flower preservation and other fields. At present, the active ingredients of film-type anti-transpiration agents mainly include silicones, polyethylene, polyvinyl chloride, paraffin, rosindiene, etc. Among them, maltodextrin is a starch hydrolysis product with a DE value of 5-20. It is one of the natural polymer materials with low price and good film-forming properties. It has excellent film-forming properties. After spraying, it forms a transparent and soft film, which can significantly reduce plant water loss, but does not interfere with plant growth or normal respiration. It can be degraded by microorganisms and turned into low-molecular sugar alcohols for plant absorption. Chitosan quaternary ammonium salt is also a pure natural extraction product. It has good antibacterial properties and can also improve the stress resistance of plants. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing an anti-transpiration agent in view of the above-mentioned defects.

[0005] An anti-transpiration agent comprises raw materials of various components with a total weight of 100 parts, and the specific weight parts of each component are as follows:

[0006] Emulsified paraffin 3-10 parts

[0007] Polyacrylic acid 0.2-2 parts

[0008] Maltodextrin 1-10 parts

[0009] Wetting agent 0.01-0.5 parts

[0010] Antibacterial agent 0.05-0.5 parts

[0011] Deionized water balance.

[0012] Preferably, the specific weight parts of each component are as follows:

[0013] Emulsified paraffin 4-6 parts

[0014] Polyacrylic acid 0.2-1 part

[0015] Maltodextrin 5-10 parts

[0016] Wetting agent 0.3-0.5 parts

[0017] Antibacterial agent 0.1-0.5 parts

[0018] Deionized water balance.

[0019] The solid content of the emulsified paraffin is 25%-50%.

[0020] The DE value of the maltodextrin is 16.5-19.5.

[0021] The molecular weight of the polyacrylic acid is 1-10 million, preferably 3-5 million.

[0022] The antibacterial agent is chitosan quaternary ammonium salt.

[0023] The wetting agent can be any one of alkylphenol polyoxyethylene ether, N-methyl pyrrolidone, polyether polyol, polyester polyol, butylnaphthalene sulfonic acid sodium salt, aqueous azone, betaine, and silicone.

[0024] A method for preparing an anti-transpiration agent comprises the following steps: adding the above-mentioned weight parts of deionized water into a reaction kettle, and then sequentially adding the above-mentioned weight parts of emulsified paraffin, polyacrylic acid, maltodextrin, a wetting agent and an antibacterial agent, stirring and dissolving uniformly to obtain the anti-transpiration agent.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The present invention utilizes maltodextrin to have excellent film-forming properties. After spraying, it forms a transparent and soft film, which can significantly reduce plant water loss, but does not interfere with plant growth or normal respiration. It can also be degraded by microorganisms to become low-molecular sugar alcohols for plant absorption.

[0027] 2. The antibacterial agent and wetting agent used in the present invention are both natural extracts, which have good antibacterial properties and can also improve the stress resistance of the plant itself. DETAILED DESCRIPTION

[0028] The preferred embodiments of the invention are described in detail below. The examples are provided to better illustrate the content of the invention, but the content of the invention is not limited to the examples. Non-essential improvements and adjustments to the implementation scheme according to the content of the invention still fall within the scope of the invention.

[0029] Implementation Case 1

[0030] Add 86.3 parts of deionized water into a reaction kettle, then add 4 parts of emulsified paraffin, 0.3 parts of polyacrylic acid, 9 parts of maltodextrin, 0.3 parts of quaternary ammonium salt chitosan, and 0.1 parts of betaine in sequence, stir and dissolve evenly to obtain the product.

[0031] Implementation Case 2

[0032] Add 85 parts of deionized water into a reaction kettle, then add 5 parts of emulsified paraffin, 0.3 parts of polyacrylic acid, 9 parts of maltodextrin, 0.4 parts of quaternary ammonium salt chitosan, and 0.3 parts of betaine in sequence, stir and dissolve evenly to obtain the product.

[0033] Implementation Case 3

[0034] Add 88 parts of deionized water into a reaction kettle, then add 3 parts of emulsified paraffin, 0.3 parts of polyacrylic acid, 8 parts of maltodextrin, 0.4 parts of quaternary ammonium salt chitosan, and 0.3 parts of betaine in sequence, stir and dissolve evenly to obtain the product.

[0035] Implementation Case 4

[0036] Add 84 parts of deionized water into a reaction kettle, then add 4 parts of emulsified paraffin, 1 part of polyacrylic acid, 10 parts of maltodextrin, 0.5 parts of quaternary ammonium salt chitosan, and 0.5 parts of betaine in sequence, stir and dissolve evenly to obtain the product.

[0037] Implementation Case 5

[0038] Add 91 parts of deionized water into a reaction kettle, then add 3 parts of emulsified paraffin, 0.2 parts of polyacrylic acid, 5 parts of maltodextrin, 0.4 parts of quaternary ammonium salt chitosan, and 0.4 parts of betaine in sequence, stir and dissolve evenly to obtain the product.

[0039] Bioassay Example Experiment on the Effect of Reducing the Transpiration of Catharanthus roseus

[0040] Test crops: Vinca roseus seedlings

[0041] Experimental method: Spray the anti-transpiration agent of each treatment on the periwinkle seedlings with similar growth and about 10 cm in length, and spray water as a control, and then dry them in the sun, and the drying time is set to 24h and 48h respectively. For each treatment, 20 periwinkle seedlings with the same growth are randomly selected. During the drying period, the average daily temperature is 25℃, the average daily ground temperature is 21℃, and the average relative humidity is 50%. The water loss rate and survival rate of the seedlings in each treatment are investigated and recorded.

[0042] Water loss rate of Catharanthus roseus seedlings: 5 plants were randomly selected from 20 plants in each treatment. According to the experimental plan, the whole plant was evenly sprayed with anti-transpiration agent, and then cut off from the rhizome, and the root fresh weight and stem fresh weight of the Catharanthus roseus seedlings were weighed. The stems and roots of Catharanthus roseus with fresh weight were placed in an oven and dried at low temperature to constant weight, and the root dry weight and stem dry weight were weighed. The water loss rate of Catharanthus roseus can be calculated by fresh weight and dry weight. The test results are shown in the table (water loss rate % = (fresh weight-dry weight) / fresh weight × 100).

[0043] Survival rate of Catharanthus roseus seedlings: The treated Catharanthus roseus seedlings were planted in the normal way, and the sprouting of new leaves was taken as the survival standard. After 60 days, the number of surviving seedlings with different treatments in the entire test area was investigated, and the survival rate of each treatment was calculated.

[0044] Experimental study on the effect of anti-transpiration agent on reducing transpiration of Catharanthus roseus seedlings

[0045]

[0046] The above implementation cases are only for illustrating the technical solutions and features of the present invention, and their purpose is to enable people familiar with the technology to implement them better. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention are within the protection scope of the present invention, and those not described in detail are prior art.

Claims

1. An anti-transpiration agent, characterized in that It includes raw materials of various components with a total weight of 100 parts, and the specific weight parts of each component are as follows: Emulsified paraffin 3-10 parts Polyacrylic acid 0.2-2 parts Maltodextrin 1-10 parts Wetting agent 0.01-0.5 parts Antibacterial agent 0.05-0.5 parts Deionized water balance; Wherein, the wetting agent can be any one of alkylphenol polyoxyethylene ether, N-methylpyrrolidone, polyether polyol, polyester polyol, butylnaphthalenesulfonic acid sodium salt, aqueous azone, betaine, and silicone; Preparation steps: add the above-mentioned weight parts of deionized water into a reaction kettle, and then add the above-mentioned weight parts of emulsified paraffin, polyacrylic acid, maltodextrin, wetting agent and antibacterial agent in sequence, stir and dissolve evenly to obtain the product; The solid content of the emulsified paraffin is 25%-50%; The DE value of maltodextrin is 16.5-19.5; The molecular weight of the polyacrylic acid is 3-5 million; and the antibacterial agent is chitosan quaternary ammonium salt.

2. An anti-transpiration agent according to claim 1, characterized in that The specific weight parts of each component are as follows: Emulsified paraffin 4-6 parts Polyacrylic acid 0.2-1 part Maltodextrin 5-10 parts Wetting agent 0.3-0.5 parts Antibacterial agent 0.1-0.5 parts Deionized water balance.

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