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The difference and effect of plant regulators and biostimulants

Date: 2025-06-19 15:44:38
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The difference and effect of plant regulators and biostimulants

Definition and source

Biostimulants come from nature. They are small molecule organic active substances extracted by biotechnology without artificial chemical synthesis, and can act directly on plants. Internationally used biostimulants are classified into: microorganisms, humic acid, alginic acid, amino acids, chitosan, and inorganic salts. As green, safe, and bio-based raw materials, they have a significant promoting effect on plant growth and development.

Plant growth regulators are chemical substances that are artificially synthesized or extracted from microorganisms. They have chemical properties similar to plant hormones. Common plant growth regulators include DA-6, Forchlorfenuron, Sodium Nitrophenolates (Atonik), Auxin, Gibberellic Acid (GA3), etc. These regulators can regulate the growth and development of plants.

Mechanism of Action

The mechanism of action of biostimulants is carried out from the plant body to the external environment at the same time. It can not only enhance the gene expression of resource material absorption and utilization in the plant body, but also activate the plant metabolic signal transmission channel, so that the plant can achieve the best physiological benefit balance. Biostimulants can act as an alarm. When plants encounter environmental stress, they send chemical warnings to plants to stimulate and enhance the plant's own physiological processes, thereby improving the plant's ability to resist external stress.

The mechanism of action of plant growth regulators is to activate gene expression, change the characteristics of cell walls to make them loose to induce cell growth, induce enzyme activity and promote or inhibit the formation of nucleic acids and proteins, and change certain metabolic pathways to regulate cell division, elongation and differentiation. It is to directly change the level of plant hormones to regulate the growth and development process of plants.

Effect of use

Biostimulants:

① Rooting and growth promotion, improving plant yield and quality. The use of biostimulants in arid climates and vegetable planting has the greatest impact on yield.

② Enhance the gene expression of plants to resist adversity and improve the ability of crops to resist external stress

③ Improve the utilization rate of resource substances by plants

④ Improve the quality of crops in terms of sugar, color, size, vitamin content, etc.

⑤ Improve the physical and chemical properties of the soil, improve the soil microenvironment, and facilitate crop nutrient absorption. The effect is more obvious in soils with low organic matter content, acidification, saline-alkali soils and poor soils.

Plant growth regulators:

① By changing the hormone level in the plant, promoting cell division and elongation, the plant body grows rapidly.

② Improve the quality of agricultural products.

③ Regulate plant flowering and fruiting


Dosage

The use of biostimulants is limited, and excessive use will not cause irreversible damage to crops. The specific amount of use needs to be determined according to factors such as the type of plant, growth stage and soil conditions.

The amount of plant growth regulators used needs to be strictly controlled. It works at low concentrations, and too high a concentration may have adverse effects (such as inhibiting plant growth). Factors such as timing of use and temperature will also affect its effectiveness.


Duration of effect

The effect of biostimulants may not be as fast as that of plant growth regulators in the early stage. Since its mechanism of action is to improve the physiological function of the plant itself and improve the soil environment, its effect can last for a long time.

Plant growth regulators have the characteristics of rapid effect but relatively short duration. Since its mechanism of action is to directly regulate the physiological process of plants, its effect often gradually weakens with the growth and metabolism of plants. The use of plant growth regulators is also affected by many factors, such as temperature, humidity, light, etc., which may cause their effects to be further weakened or ineffective.


Safety

Biostimulants: Since biostimulants come from nature and are not artificially synthesized, they are relatively safe and will not have a negative impact on humans, animals, plants and soil.

Plant growth regulators: Improper use or excessive use may cause abnormal growth or even death of crops, and some plant growth regulators are potentially toxic and may endanger our health.
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