Nitro-fulvic Acid and Its Physiological Activity of Dananhu Weathered Coal

HaMi Dananhu coal was oxido decomposed by nitric acid and high yield nitric fulvic acid was obtained. It shows that this nitric fulvic acid has a good stimulation on plant growth by physiological acitive experiments. The content of acid radical group and carboxyl group increase with the increase of the E 4/E 6 value. The nitric fulvic acid is of great value on plant growth on account of its active groups increase.