Seaweed fertilizer is a natural organic biological fertilizer, the main raw material of which is selected from natural seaweed. The essential substances are extracted from seaweed through special biochemical treatment, thus natural active components are greatly retained. The seaweed fertilizer is of high biological activity, because it contains seaweed polysaccharide, aiginic acid, highly unsaturated fatty acid and various natural plant growth regulators, which particularly exist in seaweed. With such high biological activity, seaweed fertilizer can promote the generation of nonspecific active factor by stimulating the plants; adjust the balance of endogenous hormone.
The soil can be enriched organic matter by seaweed fertilizer directly or through plants, and a variety of beneficial microorganisms in soil can be activated, which play the role of catalytic in the metabolic cycle of plants and microorganisms, thus enhance the biological effectiveness of the soil. The metabolite of plants and soil microorganisms can provide more nutrients for plants. Seaweed fertilizer is a kind of natural biological agents, which can function harmoniously between plant and soil ecosystem. It is a natural soil conditioner owing to containing some natural compounds included sodium alginate, that can promote the formation of soil aggregate structure, improve the soil internal pore space, coordinate the proportion of solid, liquid, and gas in soil, recover the lost natural colloidal balance due to soil overburden and chemical pollution, increase biological activity of the soil, promote the release of available nutrients, be helpful for the root growth and improve the stress resistance of crops.
Traditional chemical fertilizers have some shortages such as the single fertilizer efficiency and serious pollution, and long-term use can damage the soil, while seaweed fertilizer has some advantages that any other fertilizers can not match, such as the good affinity between seaweed fertilizer and terrestrial plants, avirulent and harmless to human and livestock and free from pollution to the environment. It is quite a special fertilizer for organic food. Different and various seaweed fertilizers are widely used in fruit, vegetable, flowers, cotton, peanuts, soybeans and other kinds of cash crops.
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