3. Improve the soil
Seaweed fertilizer is a natural biological agent that can add organic matter to the soil directly or through plants and activate various soil microorganisms. These microorganisms can act as catalysts in the plant-microbe metabolite cycle, which increases the biological effectiveness of the soil. The metabolites of plants and soil microorganisms can provide additional nutrients to plants.
Seaweed fertilizer contains natural compounds, such as sodium alginate, a natural soil conditioner that promotes the formation of soil masses and grenades, improves soil pore space, and harmonizes the ratio of solids, liquids, and gases in the soil. It restores the balance of colloid lost due to overburdened soil and chemical pollution, increases the release rate of soil bioactive substances and effective nutrients, facilitates root growth, and improves crop resistance and heavy crop resistance.
4. Extra long-lasting fertilization effect
Seaweed fertilizer can increase organic matter in the soil directly or through plants and activate various beneficial microorganisms in the soil, which can act as a catalyst in the plant-microbe metabolite cycle and increase the biological effectiveness of soil. The metabolites of plants and soil microorganisms can provide more nutrients to plants. Meanwhile, the chelating system formed by seaweed polysaccharide and humic acid can make the nutrients released slowly and prolong the fertilization effect.
5. Safe and non-polluting
Seaweed fertilizer raw materials from natural seaweed and terrestrial plants have a good affinity, non-toxic and harmless to humans and animals, no pollution to the environment, are the production of harmless vegetables of high-quality fertilizer.
Seaweed extract contains a large number of natural crop growth active substances in addition to direct participation in plant growth and development, such as seaweed polysaccharides, oligosaccharides, mannitol, amino acids, minerals, vitamins, etc., which promote the synthesis of crop proteins and sugars, enhance photosynthesis and root growth and development, increase chlorophyll content, promote plant cell division and elongation, and enhance plant metabolism.
Therefore, seaweed fertilizer can not only increase crop yield by 10-40% but also greatly improve the external and internal quality of the applied crops and greatly improve the commercial value of crops. According to the Gansu Provincial Academy of Agricultural Sciences scientific and technical personnel using liquid seaweed fertilizer on cucumbers, tomatoes, peppers, carrots, and other vegetables test, cucumber yield increased by 18.8%, high-quality melon increased by 22.7%, poor quality melon reduced by 20.4%, and cucumber taste excellent, disease resistance enhanced; so that the growth and development of tomatoes accelerated, early maturity and increased yield, the improvement of tomato quality is extremely obvious.
According to tomato base growers in Anshun and Dushan, Guizhou, the application of liquid seaweed fertilizer has greatly reduced the cracking of tomatoes, greatly improved the commercial appearance of tomatoes, and significantly improved economic benefits.
The application of seaweed fertilizer on pepper has the effect of promoting early maturity and improving yield, with a 30% increase in yield, the dry matter content of pepper increased by 13.8%, soluble sugar content increased by 4.1%, and vitamin C content increased by 23.3%; cabbage can be increased by up to 18% after foliar spraying with liquid seaweed fertilizer.
3. Enhance the resistance of vegetable crops
The results of treating tomato seedlings with different concentrations of seaweed fertilizer at the seedling stage showed that 2.0% g/L (g/L) of seaweed fertilizer significantly improved the drought resistance of tomato seedlings, and further correlation tests between concentration and drought resistance indexes showed that the correlation between concentration and water uptake of isolated leaves was extremely significant; under water stress at a soil moisture content of 10.6%, treatment with 2.0% g/L (g/L) of seaweed fertilizer The treatment of tomato seedlings in heliotrope can achieve a maximum water-saving rate of 22.6% for tomato.
4. Enhance disease resistance and insect resistance of vegetable crops
Seaweed fertilizer is a new type of fertilizer with seaweed extract as the core material, which is a new type of marine biological preparation, and its remarkable disease resistance effect is increasingly favored by domestic and foreign users.
The direct reason for the disease-resistant efficacy of seaweed fertilizer lies in the special kind of organic substances contained in seaweed, which can regulate the osmotic pressure of cytoplasm and chloroplast, protect a series of enzymes transformed into active resistant chemicals in the cells of plants injured by diseases, and enhance the resistance to pests and pathogens.
The most widely studied and applied is chitosan oligosaccharide extracted from seaweed. Numerous studies have shown that chitosan oligosaccharides can promote the formation of plant healing tissue, improve immunity, and resist fungal, bacterial, and viral infestation.
It is effective in preventing and controlling dead plant diseases such as wilt, yellow wilt, root rot, and virus caused by a heavy crop of vegetables. At the same time, mannitol, iodine, and betaine in seaweed fertilizer have natural antibacterial and antiviral effects, which makes seaweed fertilizer achieve a comprehensive upgrade of disease prevention, disease resistance, and disease treatment. Also, special ingredients such as oligosaccharides, iodine, and betaine in seaweed fertilizer have good repellent effects on pests such as aphids and root-knot nematodes.