Agricultural surfactants: magical "helpers" in farmland

In modern agriculture, surfactants, as an efficient and environmentally friendly chemical adjuvant, are playing an increasingly important role. They can not only improve the growth conditions of crops, but also improve the efficiency of the use of pesticides and fertilizers, and even greatly benefit the remediation of polluted soil.

1. What are agricultural surfactants?

Surfactants are a class of molecules with an amphiphilic structure, that is, they are both hydrophilic and lipophilic. This unique property allows surfactants to significantly change the surface properties of solvents and the interfacial tension of the system at lower concentrations. In the agricultural field, surfactants are widely used to improve crop growth conditions, regulate soil properties, and improve the utilization rate of pesticides and fertilizers.

2. The main functions of agricultural surfactants

Increase wettability and dispersibility: Surfactants can reduce the surface tension of the solution, making it easier for fertilizer or liquid medicine to wet plant leaves and soil particles, thereby increasing the absorption efficiency of nutrients and the coverage area of pesticides.

Improve soil permeability: In arid areas or seasons, surfactants can reduce the surface tension between water and soil particles, promote water penetration into the deep soil layer, and improve the growth environment of crops.

Prevent fertilizer from agglomerating: Adding surfactants to fertilizers can effectively prevent fertilizers from agglomerating during storage and transportation, and maintain the looseness and fluidity of fertilizers.

Improve the stability of pesticides: Surfactants can improve the interfacial tension between the components in the emulsion, forming a uniform and stable dispersion system, thereby improving the stability and use effect of the pesticide emulsion.

3. Specific applications of agricultural surfactants

Foliar fertilizer enhancement: Surfactants can increase the wetting and penetration ability of foliar fertilizers, dissolve the wax layer of plant leaves, change the leaf structure, and make nutrients easier for plants to absorb. At the same time, they also have good moisturizing and adhesion effects, prolonging the residence time of foliar fertilizers on the leaves, and further improving the absorption efficiency of nutrients.

Pesticide formulation: Many pesticides have low solubility in water. By adding surfactants, these pesticide molecules can be wrapped in the hydrophilic part of the surfactant molecules, thereby increasing their solubility in water. In this way, the use efficiency of pesticides is improved, and they can better interact with target pests or pathogens, reduce the amount of pesticides used, and reduce adverse effects on the environment.

Soil remediation: Surfactants have good binding ability for oil, aromatic hydrocarbons, halogenated organic compounds, etc., and can be used for the remediation of contaminated soil. They can solubilize these pollutants and promote their migration and transformation in the soil, thereby reducing the degree of soil pollution and improving the bioavailability of the soil.

4. Special introduction to biological surfactants-rhamnolipids

Rhamnolipids are a type of glycolipid metabolite produced by microbial fermentation, which has significant advantages of ecology, safety and stability. As a biological surfactant, it has a wide range of application prospects in the agricultural field. Rhamnolipids can reduce the surface tension and contact angle of liquids and promote the absorption of nutrients in fertilizers; at the same time, it also has excellent chelation ability and rapid conduction ability of trace elements in fertilizers, which can ensure the long-term effectiveness of fertilizers. In addition, rhamnolipids can also be used for soil remediation, enhance soil permeability and improve soil aggregate structure.

5. Conclusion

As an important part of modern agricultural technology, agricultural surfactants play an irreplaceable role in increasing crop yields, improving the quality of agricultural products, and protecting the ecological environment.