Comprehensive care for crop health Chitin (chitosan) Basic knowledge of chitin Crab shell contains about 30% protein, calcium carbonate and chitin, also known as chitin. Dilute alkali is used to remove the protein, and dilute acid is used to remove calcium carbonate, so that purer chitin can be obtained. Chitin is also called chitosan after deacetylation. Chitosan will be further broken and it will be more easily absorbed and used. It is called soft gold. Oligochitosan. Chitin and chitosan are natural polymers that are only positively charged in the dissolved state in nature, and they are also the only natural defects in the earth's biochemical system. They belong to the linear amino polysaccharides. [(1,4)-2-acetamido-2-deoxy-β-D-glucose] has the molecular formula (C8H13NO5)n, and the monomers are connected by β(1→4) bonds. The molecular structure is : The oxygen atom connects the sugar ring of each carbon atom to the next sugar ring, and the side groups “hang†on these rings. Since 1811, French scholar Henli Brocronnat. first isolated and extracted chitin from mushrooms. By 1859, Rouget found that chitin could be dissolved in organic acids. From then on, the world had a preliminary understanding of chitin. Since the 1960s, research on chitin has become very active. In 1982, Japan included methicone in the 1982-1992 10-year development plan. In 1984, Japan allocated $5 billion to commission 13 universities to exchange chitin. In 1986, scientists at the University of Washington first discovered that chitin is a physiologically active substance. This discovery lays a theoretical foundation for the development and development of chitin in the future, and has attracted worldwide attention. Chitin has also been referred to by the world as "the sixth vital element discovered by scientists." As the special physiology of chitin has been continuously discovered, it has attracted the attention of the global scientific and technological community and industry. The international community has held seven sessions of chitosan academic conference. . The research and development of chitin has become a world-renowned technology field. Some developed countries are rushing to invest a lot of money in research and development. How does chitin improve soil? Friends of farmers who have been producing vegetables for many years have realized that: After years of planting greenhouses, after changing other varieties, the disease is also very serious and the yield is not going up. The quality of the fruits produced is also very low. The old shed is difficult to manage. Many vegetable farmers have realized that this is a problem with soil, and some have had to change their habits again and again, change greenhouses, and some even push down the building. There are many reasons for these problems. The following are summarised as follows: 1. Excessive application of chemical fertilizers destroys the soil microbial communities, greatly reduces the activity of microorganisms, and makes it difficult to absorb and absorb and absorb and absorb ions. Second, the balance between nutrients in soil nutrients is destroyed, resulting in antagonism between nutrients. That is, the proportion of soil nutrients is imbalanced. The longer the period of cultivation, the more often this contradiction becomes more prominent. Third, nutrient concentration. It is obvious that the nutrient concentration is an important part of the root absorption. When the concentration of nutrients in the soil exceeds a certain amount, the selective absorption ability of the root to the ion is reduced, and even the root tissue is burned. That is, soil salinization. Fourth, soil pH, ventilation and so on. It is obviously not enough for these problems to occur simply by changing soil, changing soil, and no longer applying fertilizer. People are actively seeking something that can improve the soil. With the continuous advancement of science and technology, scientists have discovered that chitin has all the characteristics of soil improvement: First, it can stimulate and strengthen the multiplication of the number of microorganisms in the soil and increase soil microorganisms. Activity and pregnancy vitality. It does not die as if the live microbiological agent did not respond to the conditions of survival. The activity of chitin is free from external interference: as long as it enters the soil, chitin is extremely active. Second, remove the hazards of closed storage fertilizers in the soil, so that the closed state fertilizer in the soil can achieve a favorable transformation to harm, that is to say: chitin can make the invalid nutrients in the soil into effective nutrients that plants can absorb and use. Improve the effectiveness of chemical fertilizers, that is, fertilizer utilization. Third, improve the physical structure of the soil, make the soil loose, water, form a good granule structure, reduce the number of irrigation, thus promoting the development of the root system, the formation of a strong root system. 4. Decompose and degrade the harmful chemical substances in the soil and relieve the accumulated harmful chemical residues in the soil. Fifth, adjust the soil pH (ie, PH) to a very suitable crop growth. This is due to the fact that chitin is the only positively charged substance in nature. How does chitin inhibit nematodes? The effect of chitin suppressing nematodes has been confirmed in developed countries and has begun to be applied. Chitin can stimulate the activity of actinomycetes in the soil into geometric progression. When the number of actinomycetes reaches a certain level, the survival space of nematodes will disappear, and the purpose of controlling nematodes will be achieved. At the same time, chitin inhibits the survival and reproduction of harmful microorganisms (such as nematodes) and pathogenic bacteria by accelerating the decomposition of crop residues (such as chicken excreta, plant residues, etc.) and activating harmful microorganisms in the soil. Elimination of harmful microorganisms depends on survival. Foundation. Numerous experiments have shown that the application of chitin for only 12 days increases the activity of soil microorganisms by nearly 20 times. The original nematode that harmed crop roots was completely eaten by the actinomycetes in the soil. Other applications of chitin in agriculture: Suitable for foliar application of all green plants, and have: (A) Form a protective film on the surface of the plant to prevent germ infestation. (B) is itself a super-efficient plant nutrient. (C) Significantly reduce the occurrence of viral diseases. (D) Protect the fruit and reduce fruit deformity. (E) Improve the quality of agricultural products. The preferred brand for the production of pollution-free green agricultural products. (F) The most effective plant drug remedy. Used to rescue phytotoxicity caused by misuse of pesticides. (G) Unusual growth phenomena such as flowering and guillotine tops lifting during crop growth. (H) Harnessing saline-alkali land. (I) Governance of environmental pollution. Note: 1. This product is non-toxic and harmless, which is conducive to environmental protection 2. This product can be used as a rooting agent. 3. Other applications in agriculture Please refer to the above methods for reasonable use. Weifang Hyde Chemical Design Institute Address: Weifang Economic and Technological Development Zone Telephone Fax E-mail: Http://
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