The essence extracted from Ascophyllum Nodosum through biochemistry fermentation method, contains cytokinin, alginic, betaine, mannitol, polysaccharide, iodine and microelement etc.It has remarkable functions in promoting cell division, anti-stress, anti-plant diseases and insect pests, increasing yield, regulating growth and improving soil condition and so on.Meanwhile, it can comply with requirement of producing green organic food because of its high efficiency and safety.