What is humic acid?

What is humic acid? What is the function of humic acid? Please also ask netizens to help introduce that humic acid is the product of humification of soil organic matter. Peat (peat), lignite, weathered coal and so on contain a lot of humic acid. Humic acid fertilizer is made of humic acid as the main raw material by adding a certain amount of nitrogen, phosphorus, potassium or some trace elements, referred to as rotten fertilizer, it contains a lot of organic matter and a lot of effective nutrients, which belongs to multi-functional organic-inorganic compound fertilizer. The planting network has sorted out the effect of humic acid on crops, which is listed in detail below for netizens' reference. The effect of humic acid on crops: first, humic acid contains a variety of active functional genes, which can stimulate crop physiological metabolism and promote growth and development. For example, humic acid can promote early seed germination and high seedling emergence rate; stimulate seedlings to take root quickly, have more secondary roots, increase the amount of roots, and increase the ability of crops to absorb water and nutrients. Second, humic acid can make ammonium bicarbonate reduce the loss of ammonia nitrogen, improve the utilization rate of nitrogen fertilizer, inhibit urease activity, reduce urea volatilization, inhibit soil fixation of water-soluble phosphorus, and promote phosphorus absorption by roots. Humic acid chelates with insoluble trace elements, which is beneficial to the absorption of trace elements by roots and leaves. Humic acid can promote the formation of soil aggregate structure, regulate soil pH value, improve soil water and fertilizer conservation capacity, and promote the activity of soil microorganisms. Function 4. Humic acid is mostly amphoteric colloid with high surface activity and has inhibitory effect on fungi, which can enhance crop resistance, change cell membrane permeability, promote the absorption of inorganic nutrients, prevent rot and root rot, and reduce diseases and insect pests. Fifth, improve the activity of various enzymes, increase the content of chlorophyll, and mobility, can effectively improve plant root activity and prevent premature senescence. Advantages of mixed use of organic fertilizer and chemical fertilizer what is organic fertilizer