Improving Soil Fertility: Humic acid fertilizer can increase soil organic matter content, improve soil structure, enhance soil water and fertilizer retention capacity, and improve soil pH buffering capacity, thus effectively improving soil fertility. Humic acid can adsorb and fix nutrients in the soil, making them less prone to loss.
Promoting Plant Growth: Humic acid in humic acid fertilizer can promote root development, increase the plant's ability to absorb water and nutrients, and improve the plant's stress resistance, thereby promoting plant growth.<sup>1</sup> Humic acid has a stimulating effect on plant growth, increasing chlorophyll content and photosynthetic efficiency.<sup>2</sup>
Increasing Crop Yield and Quality: The nutrients in humic acid fertilizer can improve the photosynthetic efficiency of crops, increasing crop yield and quality. Humic acid fertilizer can improve the quality of agricultural products, enhancing their nutritional value and taste.
Improving the Soil Environment: The organic matter in humic acid fertilizer can improve the soil environment, inhibit the growth of harmful microorganisms in the soil, and reduce soil pollution. Humic acid promotes soil aggregate formation, improving soil structure and aeration.
It enhances water use efficiency by reducing soil salinity and water loss. In arid regions, humic acid fertilizers can improve plant drought resistance and protect plants from drought damage.
It acts as a fertilizer synergist, as the trace amounts of N, P, K, S, and micronutrients in humic acid provide nutritional benefits. Humic acid can also be used as a carbon source by microorganisms, releasing nutrients.
It strengthens plant stress resistance by reducing stomatal opening intensity and transpiration, thereby lowering water consumption and improving the plant's water status. This ensures normal crop growth and development under drought conditions, enhancing drought resistance.
It acts as a pesticide synergist, possessing strong water-holding properties and acting as a drought-resistant agent for crops. Mixing humic acid with pesticides can significantly reduce the decomposition rate of organophosphates.
Humic acid enhances the effectiveness of fertilizers: it enhances the effectiveness of nitrogen, phosphorus, and potassium fertilizers. Humic acid reacts with urea to form a complex, resulting in a significant slow-release synergistic effect on urea. Humic acid forms a humic acid-metal-phosphate complex with phosphate fertilizer, thus preventing phosphorus fixation in the soil. The acidic nature of humic acid helps absorb and store potassium ions, reducing their loss.
