In foreign countries, seaweed fertilizer has a long history of use, a wide variety of products, and a wide range of applications and crops. In China, from the first seaweed fertilizer registration certificate in 2000, there have been dozens of seaweed fertilizer production enterprises approved for registration in the Ministry of Agriculture, and hundreds of registered seaweed fertilizer products(O-PHOSPHORYLETHANOLAMINE), in addition to the domestic market, the products are far away. More than 100 countries and regions in Europe, America and Southeast Asia. Seaweed fertilizer can develop rapidly and is popular. The most important reason is that the use of seaweed fertilizer is significant, bringing obvious economic, ecological and social benefits.
In foreign countries, seaweed fertilizer is called “fool fertilizer”, which means that it is a kind of intelligent fertilizer. It can be used by non-professionals to achieve professional planting level. From the perspective of domestic and international use, seaweed fertilizer is widely used as fertilizer for wheat, corn, rice, fruits and vegetables, tea, Chinese herbal medicine and horticulture (see Figure 4). It promotes crop root development, improves crop photosynthetic efficiency, and promotes crops. Root and main stem growth, improve crop yield and quality, enhance crop resistance to adverse environments, and promote early fruit ripening.
Improve soil quality: Studies have shown that the chelation and hydrophilic properties of seaweed polysaccharides can improve the physical, chemical and biological properties of the soil, thereby improving the water retention capacity of the soil and promoting the growth of beneficial microorganisms in the rhizosphere; the algae polysaccharides can be combined with the soil. The metal ion reacts to form a high molecular weight complex, which improves the soil aggregate structure and thus helps to maintain soil moisture. A good soil aeration environment can stimulate the growth of crop roots and rhizosphere microorganisms.
Promote seed germination: Seeds treated with seaweed extracts have a faster breathing rate and a significantly higher germination rate. Many studies have confirmed the role of natural plant growth regulators, seaweed polysaccharides, etc. in the main seaweed extracts.
Immersion roots improve the survival rate of transplanting: before planting plants in wet areas, impregnation with this fertilizer can prevent the wilt of plant roots and leaves.
Promote plant growth: Alginate in seaweed fertilizer can reduce the surface tension of water, form a film on the surface of plant leaves, increase the contact area, and facilitate the passage of water or water-soluble substances into the cell interior through the leaf surface barrier structure. Effective absorption of nutrients.
Increasing the number of flower buds: In 1984, horticulturists at the University of Cape Town, South Africa, experimented with different types of flowers, demonstrating that seaweed fertilizer(O-PHOSPHORYLETHANOLAMINE) not only significantly increased the number of flower buds (increased rate of 30%-60%), but also significantly advanced the flowering period. . Huang Guoyong, former chairman and senior agronomist of the Wendeng Science and Technology Association of Shandong Province, said: "After using seaweed fertilizer, the apple leaves are thick and the leaves are dark green, and it is easy to form short branches. This can promote flower bud differentiation and more fruitful results.
Increasing the fruit setting rate: The results of the greenhouse test showed that the plant height, diameter, average fruit setting rate and yield of tomatoes fed seaweed extract were significantly higher than those of the control plants.
Improve the stress resistance and disease resistance of crops: The study found that the application of seaweed fertilizer on vegetables such as eggplant, rapeseed, cucumber, cabbage, Chinese cabbage, celery, carrot, tomato, Chinese cabbage and pepper has positive effect on improving its resistance to stress. effect. The application of seaweed fertilizer can improve the antiviral ability of tobacco mosaic virus, reduce the incidence of gray mold of tomato, reduce the disease of rice blight, and have obvious disease resistance to soft rot and downy mildew of Chinese cabbage. Technicians have found that seaweed extract has a good in vitro passivation effect and prevention of infection on tomato fern leaf virus disease (CMV). After inoculation with CMV virus, seaweed fertilizer is applied, and the activity of SOD and POD enzymes of the diseased plant is significantly increased. High, and significantly reduce the virus content of the diseased plants, reducing the damage of the virus to the chloroplast.
Increased yield and improved quality: The application of seaweed extracts can increase the yield of various crops to varying degrees. The researchers are on crops such as oilseed rape, pepper, sweet potato, cucumber, potato, apple, citrus, pear, grape, peach, corn, wheat, rice, soybean, cotton, tea, tobacco, etc. The experimental results show that seaweed fertilizer can significantly increase the yield, and the yield increase is between 10% and 30%. The yield of legumes treated with seaweed extract increased significantly, with an average increase of about 24%. Spraying seaweed foliar fertilizer significantly increased the yield of garlic, which increased the yield by 20% compared with the control. The garlic garlic cross-head diameter and single-head garlic weight also increased significantly.
Seaweed fertilizer (O-PHOSPHORYLETHANOLAMINE) can increase crop yield and improve the quality of fruits and vegetables. It may be because the fertilizer contains minerals such as iodine, potassium, sodium, calcium, magnesium and barium necessary for the growth of terrestrial plants, as well as manganese, molybdenum, zinc, iron, boron and copper. Such trace elements, as well as a variety of natural plant growth regulators (auxin, cytokinin, gibberellin, abscisic acid, ethylene, betaine, etc.) contained therein, these physiologically active substances can participate in organic and inorganic substances in plants The transportation promotes the absorption of nutrients by plants, and at the same time stimulates plants to produce non-specific active factors, regulates the balance of endogenous hormones in plants, and plays an important role in regulating plant growth and development. It has the Important role to the appearance of color, color and flavor of fruits and vegetables.