Chitosan oligosaccharide is a class of oligomers formed by hydrolysis of chitosan. It is an alkaline oligosaccharide with the advantages of small relative molecular weight, low toxicity, good water solubility and strong absorption. Chitosan oligosaccharide is an important plant system-acquired disease resistance inducer, and has the effect of inhibiting virus infection in plant disease control.
In agriculture, chitosan oligosaccharides have played a high role in the fields of new biological pesticide products, high-efficiency biological fertilizers, crop growth regulators, and control of nematodes. Chitosan oligosaccharide can be used as a new type of fertilizer for agricultural production. It is based on the fact that chitosan oligosaccharide itself has the effect of regulating the physiological activity of plant cells and improving the quality of crops. Using this feature in the actual production process, combined with microbial fertilizers, act together in the growth process of plants. Chitosan oligosaccharides can be called agricultural fertilizer additives, chitosan oligosaccharide plays the role of growth factor. As microbial growth metabolites, oligosaccharides play a huge role in plant growth and immunity.
Chitosan oligosaccharide benefits
1. Seed pretreatment – disease resistance, strong seedlings, increased yield
Through seed dressing, seed soaking, coating and other methods of treating seeds, the germination power of seeds can be increased, the germination rate of seeds can be improved, the emergence of seeds can be promoted, and the seedlings can be made strong.
Seed treatment can activate its own immune and growth systems, inhibit the invasion and growth of pathogens, and dissolve the protein coats and cells of fungi, bacteria and viruses, thereby effectively preventing crop diseases.
And seed treatment can not only make plants robust and root system developed, but also promote the early growth and distribution of rhizobia, which can directly promote the increase of yield.
2. Soil treatment – control nematodes, improve soil conditions, and promote root development
A, kill nematodes
Chitosan oligosaccharide induces crops to produce chitinase, which can decompose and absorb chitin oligosaccharide in nematode bodies and eggshells and dissolve the shells, resulting in the death of nematodes and eggs. Chitooligosaccharides can often be used on crops to induce chitinase production at high levels for prolonged periods of time to prevent nematodes.
B, optimize the flora
After applying chitosan oligosaccharide to soil, a large number of beneficial bacteria, such as actinomycetes, can be cultivated in a short time. These beneficial bacteria secrete a large amount of antibiotics and chitinase (chitinase can break down and destroy the body and egg shell of nematodes), which can directly inhibit adults and eggs, while inhibiting harmful bacteria such as Pythium, Phytophthora, Rhizoctonia, etc. germ. , Fusarium, mold, Fusarium and other harmful bacteria, thereby reducing the compound infection of harmful bacteria caused by nematode damage and reducing the death of seedlings.
It has been determined that the use of chitosan oligosaccharide fertilizers increases the number of cellulolytic and autonomous nitrogen-fixing bacteria by a factor of nearly 10 and the number of actinomycetes by a factor of 30 in the soil.
C, the root of health
Chitosan oligosaccharide can significantly contribute to the growth and development of roots. It promotes the division of root cells and the rapid increase of capillary roots, reduces the appearance of dead and rotten roots, and promotes the development of the root system. Therefore, when crops are damaged by nematodes during vegetable growth or fruiting, root irrigation can restore the vigor of crops and maintain a normal growth state. Thus, damage caused by nematodes can be minimized.
3. Foliar spray – resistance to disease, bacteria and stress for healthy yield increase
A, induction of stress resistance in crops
Chitooligosaccharides can induce structural resistance to diseases in crops. For example, it can thicken the cell wall of plants or improve the degree of lignification; rapidly activate cells, induce plants to produce a variety of stress-resistant substances in a short time, and induce a series of defense responses in plants; enhance plant resistance to diseases and adverse environments resistance.
It is widely used to control various crop diseases caused by fungi, bacteria and viruses, especially viral diseases, fusarium wilt, fusarium wilt of watermelon, tomato, tobacco, cotton, fruit, pepper, vegetables, rice and other crops.
B, Activation of cells by chitosan oligosaccharide significantly increases yield
Induce the overall regulation of endogenous hormones: leaf spraying can improve air permeability and water retention capacity; foliar spraying or soil application can promote root cell division, stimulate stronger root system, and enhance plant drought resistance and lodging resistance.
The stem is thick and short, and the leaves are dark green and moist, which can significantly increase photosynthesis and promote the directional transport of photosynthetic products.
After application, it can make all plant organs grow vigorously, enhance the stress resistance of crops, help damaged plants to recover, promote the development of seedlings and root systems, promote plant growth and development, and ultimately improve crop quality.