Multi-function of Humic Acid Fertilizer

Effect on plant growth humic acid can promote the growth of plant roots. Enhance root activity, and promote the number of tillers and secondary roots to increase and prolong. Improve the germination rate of seeds. The application of humic acid can accelerate seed germination and increase the seedling emergence rate, especially in early spring and low temperature (generally germinate 1-3 days earlier, and the seedling emergence rate can be increased by 10% by 30%). Improve the drought resistance of crops. The application of humic acid can reduce the stomatal opening, transpiration and water consumption of plant leaves, improve the water condition of plants and increase the water content of leaves. Thus laid the foundation for panicle and seed formation, the application of humic acid can also increase the content of chlorophyll and normal photosynthesis, which is very important for material accumulation and 1000-grain weight. Improve the cold resistance of crops. The application of humic acid has obvious effect on raising seedlings in early spring in the south and cold resistance of wheat in the north. In raising early rice seedlings in southern China, we often encounter low temperature and rainy weather, and the phenomenon of dead seedlings and rotten seedlings often occur. After the application of humic acid, the ground temperature is increased and the quality of seedlings is generally improved. In the experiment, Southwest Agricultural University found that winter wheat in most areas of northern China suffered from winter damage due to the frequent occurrence of late spring cold. The application of humic acid effectively improved the cold resistance of wheat and reduced the freezing injury in varying degrees. Effectively increase the content of chlorophyll in crops. The effect of humic acid on increasing plant chlorophyll content is very obvious, no matter what method is used to treat crops can significantly increase crop chlorophyll content, such as wheat application of humic acid fertilizer, the leaf senescence index is twice as good as the control group. Stimulate the physiological metabolism of crops and improve enzyme activity. After humic acid enters the plant, it has a stimulating effect on the plant, which is mainly manifested in the increase of respiratory intensity, the increase of photosynthesis and the enhancement of the activity of various enzymes, so as to make the fruit color and mature in advance. High yield and high value (marketability of cash crops). The synergistic effect of slow release of nutrients on the synergism of nitrogen fertilizer. Humic acid is a natural urease inhibitor, which can slow down the enzymatic hydrolysis of urea and reduce ammonia volatilization. Carboxyl and phenolic hydroxyl groups in humic acid have complexing effect on ammonium nitrogen, adsorption and slow release, which can reduce nitrogen loss and improve nitrogen use efficiency. Synergistic effect on phosphate fertilizer. Humic acid can inhibit the fixation of phosphorus in soil, increase the moving distance of phosphorus in soil, delay the transformation of available phosphorus to delayed and ineffective phosphorus, activate fixed phosphorus in soil and increase the content of available phosphorus in soil. improve the utilization rate and efficiency of phosphate fertilizer. Synergistic effect on potash fertilizer. Humic acid has strong cation exchange capacity and adsorption capacity, and its functional groups can absorb and store potassium ions, slowly decompose potassium fertilizer, increase the release of potassium, increase the content of available potassium, activate soil potassium and improve the utilization rate of potassium fertilizer. Synergistic effect on trace elements. Humic acid can chelate with insoluble trace elements to form trace element chelates of humic acid which can be absorbed by crops with good solubility, which is beneficial to the absorption of trace elements by roots and leaves. Soil environmental protection function to improve soil environmental conditions. The use of humic acid can change the physical and chemical properties of high salt content, strong alkalinity, highly dispersed soil particles and poor soil structure, promote the formation of soil aggregates and make them in a good state, thus creating good conditions for the growth and development of plant roots. Humic acid can promote the formation of soil aggregates. The hydroxyl and carboxyl functional groups in humic acid are easy to coagulate with calcium ions in the soil, and then the soil aggregate structure is formed through the physiological action of plant roots, so that the soil porosity is relatively increased and the soil permeability is better. it is beneficial for crops to absorb nutrients and grow normally. The pH value of soil can be adjusted by using the principle of neutralization reaction between the acidity of humic acid and alkalinity in saline-alkali soil, so as to achieve the effect of saline-alkali treatment. Humic acid is dark in color, which is conducive to the absorption of solar energy. When humic acid is decomposed by microorganisms, it gives off heat. Enough humic acid in the soil can improve the ground temperature and fully play the role of anti-spring cold. Prevention and control of heavy metal pollution in soil. Humic acid participates in the ion exchange reaction in the soil, adsorbs and fixates the heavy metal ions in the soil, prevents them from entering the biological cycle, and can stabilize the soil structure and provide matrix and energy for soil microbial activities. thus indirectly affect the activity of heavy metal ions in the soil. The complex reaction of humic acid with heavy metal ions in soil can passivate heavy metal ions and prevent a large number of heavy metal ions from entering the plant system.