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Plant growth regulator brief description

Date: 2024-05-22 15:00:12
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Plant growth regulators (PGRs) are artificially synthesized chemical compounds that have the same physiological effects and similar chemical structures as endogenous plant hormones. Plant growth regulator belongs to the broad category of pesticides and is a class of pesticides that control plant growth and development, including synthetic compounds similar to natural plant hormones and hormones extracted directly from organisms.

Plant growth regulator is a new substance that is artificially synthesized or cultured to have similar physiological and biological effects to plant hormones. In order to effectively regulate the growth process of crops in agricultural production, improve crop quality, enhance crop stress resistance, stabilize yield and increase yield, etc.

Some plant growth regulators can be produced by plants under certain conditions, but they can also be introduced into plants through spraying. Plant growth regulator regulates plant cell division, elongation, tissue and organ differentiation, flowering and fruiting, maturation and senescence, dormancy and germination, respectively or in cooperation with each other, thereby affecting plant growth and development to achieve the desired effects.

Plant growth regulators can be roughly divided into three categories according to their role:

The first category is plant growth promoters.
It can promote plant cell division, differentiation and elongation, promote the growth of vegetative organs and the development of reproductive organs, prevent fruit falling off, promote plant rooting and germination, and induce parthenocarpy. The regulatory role is similar to that of auxins, cytokinins or gibberellins among endogenous plant hormones. Common plant growth promoters include indole-3-acetic acid, indole-3-butyric acid, α-naphthylacetic acid, 6-BA, 4-chlorophenoxyacetic acid, and 2,4-dichlorophenoxyacetic acid.

The second category is plant growth inhibitors.
It can inhibit the growth of plant apical meristems and plant germination, eliminate the apical advantage and increase side branches, and eliminate weeds, etc. The effects of plant growth inhibitors cannot be restored by application of gibberellins. Many herbicide pesticides can also act as growth inhibitors when used at very low concentrations. The regulatory effect is similar to that of abscisic acid in endogenous plant hormones. Common plant growth inhibitors include maleic acid hydrazide, glyphosate, plasticine, statin, statin, triiodobenzoic acid, etc.

The third category is plant growth retardants.
It can inhibit the growth of plant sub-apical meristems and inhibit the elongation of internodes without inhibiting the growth of terminal buds. It makes the plant stems shorter and thicker, and increases the thickness and chlorophyll content of the leaves. Since it mainly regulates the synthesis of gibberellins in plants, its effects can be restored by applying gibberellins. Common plant growth retardants include: chlormequat, benzylamine, paclobutrazol, butyrohydrazide, uniconazole, trinexapac-ethyl, etc.

How to use plant growth regulator?

1. The dosage of Plant growth regulator should be appropriate and should not be increased at will. Increasing the dosage or concentration at will will not only fail to promote the growth of plants, but will also inhibit the growth of plants and even lead to leaf deformity, dry leaves and death of the whole plant.

2. Plant growth regulator cannot be mixed at will. Many farmers often mix plant growth regulators with other fertilizers, pesticides, and fungicides. Whether Plant Growth Regulator can be mixed with chemical fertilizers, pesticides and other materials must be determined through repeated trials after carefully reading the instructions. Otherwise, it will not only fail to promote economic growth or protect flowers and fruits, but will also cause harm to the plants.

3. Plant growth regulator should be used rationally. Plant growth regulator should be prepared into a mother solution in advance, otherwise it will be difficult to mix the agent and will directly affect the use effect. It needs to be diluted according to the instructions when using it. Pay attention to protective measures when using it.

4. Plant growth regulator cannot replace chemical fertilizers. Plant growth regulator can only play a regulatory role and cannot be used as a substitute for fertilizers. In the case of insufficient water and fertilizer, spraying too much plant growth regulator is harmful to the plants.

Plant growth regulator advantages

1. Plant growth regulator has a wide range of functions and applications. The scope of application of Plant Growth Regulator includes almost all higher and lower plants in the planting industry, and regulates photosynthesis, respiration, material absorption and operation mechanism of plants, signal transmission, opening and closing of stomata, and regulation of osmotic pressure. , transpiration and other physiological processes, thereby controlling the growth and development of plants, improving the interaction between plants and the environment, enhancing the stress resistance of crops, increasing crop yields, and improving the quality of agricultural products.

2. The dosage is small, the speed is fast, and the efficiency is high. Most crops only need to be sprayed once within the specified time in a season.

3. It can bidirectionally regulate the external traits and internal physiological processes of plants.

4. Highly targeted and professional. It can solve some problems that are difficult to solve by other means, such as the formation of seedless fruits.

Plant growth regulator Summary

Compared with traditional agricultural technology, the application of plant growth regulator has the advantages of low cost, quick results, high efficiency, and labor saving. Its use has become one of the important measures in modern agriculture. Plant growth regulator is widely used in the production of cash crops, grain and oil crops, vegetables, fruit trees, horticultural crops, Chinese medicinal materials, and edible fungi. Compared with other pesticides and fertilizer products, it improves crop quality faster and has a larger output ratio.

Plant growth regulator will play a major role in promoting or regulating crop growth, enhancing plant stress resistance, increasing yield, improving plant quality, etc., and is conducive to large-scale and intensive agricultural production. It is mixed with fungicides, water-soluble fertilizers, etc., and is an important support for the integration of water and fertilizer.
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