Application of humic acid to seed coating or impregnation
Seeds treated with humic acid, coated or presoaking, can improve germination rate and accelerate growth. However, not all humic acids can stimulate the germination and root growth, and the stimulating effect may be related to the size of humic acid molecules and the concentration used. When humic acid and fulvic acid is used in combination with other nutrients needed by plants, the effect is more obvious. High activity of small molecular humate (Fulvic Acid) is more suitable for stimulating seed germination and root growth.
Small-molecule humic acid mixtures are more likely to enter seed cells. When humic acid enters the seed cells, the respiration rate increases, cell division accelerates, and the development of the meristem of the radicle and the activation of the germ and other growth points can significantly improve seed germination and seedling growth. A large number of tests showed that the root weight increased by an average of 20% to 50% compared with untreated.