Through the study of five easy-to-grow experimental products, it is found that humic acid has outstanding effect in enhancing crop drought resistance.
Why humic acid can improve crop drought resistance
1, reduce the water loss of crops: Humic acid can reduce the content of potassium ions in stomatal guard cells, thus reducing the stomatal opening strength of crop leaves and reducing leaf transpiration, thus reducing the water loss in crops, improving the water status in plants, ensuring the normal development of crops under drought conditions and enhancing drought resistance; Humic acid can also increase the content of osmotic adjustment substances such as putrescine acid in leaves to enhance the water retention capacity of crop cells, at the same time improve the activity of protective enzymes related to active oxygen metabolism in cells, adjust the active oxygen content, reduce the degree of membrane lipid peroxidation, reduce the damage of drought to cells, and thus improve the drought resistance of crops!
2. Promoting root water absorption: Organic acids secreted by crop roots can cause local damage to humic acid colloids during drought, so that they can release crop growth regulating molecules, which can enter the root system through cell membrane, affecting gene expression and enzyme activity of the root system, which is the corresponding drought response of crops; Humic acid can stimulate the growth of crop root system, improve the root system activity, thereby expanding the root system absorption area, enhancing the root system water absorption capacity, so that crops can absorb more water to maintain crop growth requirements when the soil is dry!
3. Enhance soil water retention: Humic acid is an organic polymer hydrophilic colloid, which has strong water absorption and storage capacity and can maintain soil water content. Humic acid can promote the formation of soil aggregate structure, increase soil water-stable aggregates, significantly improve soil water physical properties, soil porosity, soil permeability and water retention, increase soil effective water content, improve soil water supply capacity and drought resistance, and indirectly improve crop drought resistance; It should be noted that humic acid can be used as a drought-resistant water-retaining agent, but it still needs water to play its role. After applying humic acid, you need to water it, so that you can better play the role of humic acid and make crops grow better!
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