Http://www.cnnews.com/ At 10:09 on March 25, 2005 Xinong Online humic acid is a complex natural organic matter. It is found in soils, coal, lakes, rivers, and oceans and amounts to trillions of tons. Natural humic acid can be divided into three categories: soil humic acid, water humic acid and coal humic acid. Although the total amount of humic acid in soil and water is large, the percentage is low. Therefore, it is almost impossible to develop resources. The main raw materials for industrial humic acid are low-calorific-value coals, mainly including peat, lignite and weathered coal. Fulvic acid is a species of humic acid that can be isolated from coal-derived humic acids or extracted directly from peat and weathered coal (ie, mfa). Biochemical fulvic acid (bfa) is a product produced from agricultural and forestry waste using biotechnology, using low-temperature, medium-temperature, and high-temperature bacteria and multi-stage fermentation. Its effective content is 50% fulvic acid, nucleic acid 16 %, amino acids (25 species) 9.3%, there are many other active substances. First, the characteristics of biochemical fulvic acid Biochemical fulvic acid soluble in alkali, water, acid. It not only has the general characteristics and properties of ore fulvic acid, but also has the characteristics that general fulvic acid does not have. The main difference between biochemical fulvic acid and ore source fulvic acid can be summarized as follows: 1. The molecular weight of biochemical fulvic acid is relatively small, so it is easy to be absorbed and utilized by biology; 2. The content of functional groups of biochemical fulvic acid is small, The general physiological activity of fulvic acid is high; 3, biochemical fulvic acid can be directly dissolved in water, its aqueous solution is weakly acidic, and humic acid is insoluble in water, it needs to be converted into potassium, sodium and other monovalent metal salts or ammonium salts. Dissolved in water, the aqueous solutions of these salts are all alkaline, which is not conducive to plant absorption and utilization. The three major characteristics of biochemical fulvic acid are very beneficial to practical applications, especially in the application of agriculture, medicine, superior to the general fulvic acid. Second, the use of biochemical fulvic acid in agricultural production 1, the application of agriculture. Can promote seed germination, promote growth, improve plant resistance, improve quality and increase production. It can be used for seed dressing, foliar spraying, root irrigating, and root dipping. Using chemical fulvic acid and chemical bactericide compounded into 9.5% grams of yellow liquid agent, to control the cotton field withered, Verticillium wilt. The fulvic acid soya bean double weighting agent had the best effect in controlling root rot of soybean in a multi-point comparison test of various pharmaceuticals, and the yield increased significantly. The use of fulvic acid to treat "chemical agriculture syndrome" of fruit trees is an effective measure to save premature aging of fruit trees. 2, mixed with chemical pesticides, reduce the amount of chemical pesticides, reduce toxicity, so that the drug residue does not exceed the standard, to achieve green pollution-free standards.