Deacetylation 95% Chitosan Agriculture Products Water Soluble Chitosan Powder

Deacetylation 95% Water Soluble 100% Chitosan Powder For Agricultural

General Information of Agricultural Chitosan

Agricultural Chitosan, also known as chitosan oligosaccharide and chitosan oligosaccharide, is an oligosaccharide product with a degree of polymerization between 2 and 20 obtained by degrading chitosan by a special biological enzyme technology, with a molecular weight of ≤3000Da.

It is a low molecular weight product with good water solubility, great functional effects and high biological activity. It is fully soluble in water, easy to absorb and utilized by organisms, and its effect is 14 times that of chitosan.

It is stable, safe, non-toxic, non-stimulant and easily deliquesce.

Benefits of Agricultural Chitosan

(1) Improve crop disease resistance

Treating plants with chitin and its derivatives before plants are susceptible to diseases can produce a sensitization effect, and the treated plants can show a higher defense effect than normal plants when they are infested by diseases and insect pests. It can produce toxicity to certain fungi, bacteria, viruses and pests, and induce plants to activate their defense systems.

Oligochitosan cannot directly inactivate viruses, but it has obvious inhibitory effect on the replication and long-distance movement of viruses in plants. Effects of plant viral diseases. Use before the virus outbreak can prevent the occurrence of viral diseases, and can induce plant resistance to virus proliferation and long-distance movement in the body, and its inducing activity does not depend on the R gene of the host. Use after the virus outbreak can inhibit the spread of the virus to new leaves . It has a broad spectrum of effects on fungi, and has varying degrees of preventive effects on almost all fungal diseases, including powdery mildew, downy mildew, black mole, blight, etc., mixed with targeted fungicides, such as enoyl Morpholine, flusilazole, pyraclostrobin, thifuramide, acetoconazole, tebuconazole, cyclostrobin, etc., can achieve both internal and external considerations to achieve the effect of drug reduction and efficiency enhancement.

(2) Activate the plant's own innate immune system

Chitin, a major component of the cell wall of fungal pathogens, stimulates immune responses in plants. There are a variety of pattern recognition receptors on the cell membrane of plants. By recognizing some shared and conserved molecular motifs (that is, pathogen-associated molecular patterns) on pathogens, innate immune responses are triggered. Plant innate immunity is the key to the plant immune system. An important part of. Oligochitosan can bind to receptors on plant cells, stimulate the production of resistance signal molecules, and through signal transduction, stimulate the expression of resistance genes and produce resistance substances, so as to achieve the purpose of disease prevention and control.

Generally, the degree of polymerization of chitosan oligosaccharides is between 2 and 10, and the distribution of its acetyl groups on the chitosan molecular chain is random, and its quantity and position have a great influence on the activity of chitosan oligosaccharides. Oligochitosan has a large difference in the degree of deacetylation in the deacetylation process, that is, under the same conditions, the higher the degree of deacetylation, the more free radical content, and the higher the antibacterial activity of oligochitosan.

(3) Improve the stress resistance of crops

In the process of agricultural production, drastic changes in the external environment will cause huge irreversible damage to plants. Low temperature and freezing damage, abnormal weather, weak seedlings, leaf wilting, flower drop and fruit drop, fruit deformity, etc. The low ground temperature also reduces the absorption capacity of the root system, and the photosynthetic efficiency is low, which directly affects crop yield and quality. For example, low temperature environment can easily lead to decreased fluidity and peroxidation of plant cell membranes, causing damage to plant cells. Chitooligosaccharides can increase the content of cold-resistant substances such as soluble proteins and soluble sugars, reduce the level of membrane lipid peroxidation and increase membrane permeability. To a certain extent, maintain a high photosynthetic intensity of crops, and effectively resist the damage of low temperature to crops.

In addition, the Cu2+ and Mn2+ complexes of chitosan were used to treat corn seeds and seedlings. The complexes can significantly increase the SOD activity in the leaves of corn seedlings and reduce the oxidative stress of superoxide anion free radicals caused by salt stress, especially in the Under the action of chitosan-copper complex, the content of proline in maize seedlings decreased from 1684μg·g-1 to 913, indicating that the salt tolerance of maize seedlings could be significantly improved.

(4) Improve rhizosphere microbial populations and inhibit nematodes

Many organisms in the soil (such as plants, bacteria, fungi, etc.) can produce chitinase, which can decompose chitin tissue in fungi and insects and destroy its structure. Adding chitosan substances to the soil promotes the reproduction and activity of microorganisms. These microorganisms produce more chitinases, antibiotics and toxins, or directly compete with harmful organisms for nutrients, or directly parasitize, or activate plant defense systems, etc. In this way, the level of prevention and control of harmful organisms with chitin composition structure is increased. Oligochitosan has the function of assisting nematode inhibition. Oligochitosan can induce plant roots to secrete chitin hydrolase, which destroys chitin in the nematode egg cell wall;

(5) Stimulate crop rooting

After the chitosan oligosaccharide is absorbed by the plant, it induces the plant to produce auxin substances such as indole acetic acid and gibberellin, which stimulates the development of the root system of the plant. In pepper, rice, and potato seeds, use 300~500 times liquid Baijing to dress the seeds , can stimulate crops to germinate early, and the capillary roots in the seedling stage of crops are many and long, and potatoes have a strong absorption root system in the middle and late stages, making better use of fertilizers and water, which becomes the basis for crop drought resistance and yield increase. Coating cotton seeds at a concentration of 0.05-0.2% for 30 minutes can stimulate seed germination, increase the germination rate, and increase the number of cotton bolls per plant.

(6) Promote early plant growth

Oligochitosan has antibacterial effects in plant cells and tissues, induces plants to produce chitinase, and can increase enzyme activity, promote protein synthesis, regulate the closing and opening of plant genes, and induce the synthesis of auxin indole acetic acid (IAA) . Stimulate multiple growth and development genes of plants, synthesize bioactive substances that are beneficial to plant growth, activate plant cells, and promote rapid growth and development of plants.

After treatment of plant seeds with chitosan oligosaccharides, it promotes uniform emergence, thick main stems, early ridge sealing, early growth of plants, shortens the time of vegetative growth, and can flower 2 to 3 days in advance, laying the foundation for increasing production. The harvest period can also be 3-5 days earlier than that of the blank control. G-Teck test found that low concentration of chitosan oligosaccharide (optimum concentration 0.1mg·L-1) treated cucumber seeds and seedlings can promote the growth of cucumber seedlings, and compared with the control group, all growth indicators were significantly increased.

(7) Increase crop yield and improve the quality of agricultural products

Because chitosan oligosaccharide stimulates the root system, promotes the early growth, and improves the photosynthetic efficiency of the leaves, especially under the condition of insufficient light in the greenhouse, the plant yield is significantly increased. In the case of hail disasters, the G-Teck test showed that the control yield of the Atlantic variety 15 days before harvest was 1951 kg, and the yield per mu could be increased by 334 kg with 100 ml spray ditch, which was 17.1%, and the yield could be increased by 21.6 per mu with 150 ml spray ditch. %. It shows that the Baijing spray ditch promotes the early root system of potatoes, the plants start early, and the yield in the later period is significantly increased, and the greater the dosage, the more obvious the increase in yield. At the same time, the uniformity increases, which can increase the commodity rate of the first-class potato pieces.

After the citrus was sprayed with chitosan oligosaccharide solution 3 times during the growing season, the quality was greatly improved, mainly reflected in the increase of vitamin C content by 20%, the increase of soluble total sugar by 13%, the increase of soluble solid content by 6%, and the increase of solid-acid ratio. 52%, and the titratable acid content of citrus was reduced by 21%. Similar results were obtained on grapes, watermelons, and tomatoes.

(8) Degradation of chemical pesticide residues in plants

Oligochitosan can induce and increase the P450 enzyme activity in plant cells, and degrade chemical pesticide residues in plants. The degradation effect of permethrin is remarkable, reaching 100%.

(9) Safety enhancement

When mixed with fungicides, the amount of fungicides can be greatly reduced, up to 90% of the amount of chemical pesticides, and the effect of preventing and controlling crop diseases and increasing yields is obvious. In addition, chitosan and its derivatives can be encapsulated with Trichoderma, Beauveria bassiana, Bacillus thuringiensis and other biological bacteria to make preparations, which is not only beneficial to the storage and transportation of these microbial preparations (as carbon and nitrogen sources for microorganisms), It can also improve their effectiveness.

(10)Fruit and vegetable preservative

Post-harvest losses of fruits and vegetables are mainly caused by fungal infections, physiological diseases and physical injuries. Fruit and vegetable preservation is based on controlling the activity of microorganisms to slow down their normal life activity speed, and maintain the natural storage and disease resistance of fruits and vegetables, that is, to inhibit the respiration of fruits and vegetables, prevent ethylene production or reduce ethylene concentration.

Use the aqueous solution or emulsion of chitosan and its derivatives as the main body, spray or soak on the surface of fruits and vegetables, and form a colorless transparent film after drying, reduce the transpiration of fruits and vegetables, and keep the fruit and vegetables in good texture. Solutions with different concentrations have different viscosities, and the degree of density of the formed plastic wrap is also different, which has a significant impact on the length of preservation time. Generally, the concentration of 1% to 2% is ideal.

In addition, chitosan has a unique function of regulating plant nitrogen metabolism, forming crop and soil barrier films, passivating and chelating heavy metals, and improving soil structure. It is worth exploring together.