During the process of storage, transportation, sale and use, the feed is prone to mildew. The molds that grow and multiply will contaminate the feed, not only consume the nutrients in the feed, but also cause the feed quality to decline, and also cause diarrhea in livestock and poultry. Enteritis, which causes symptoms such as decreased digestion and decreased lymphatic function. In severe cases, it can cause death. Therefore, foreign feed manufacturers and researchers attach great importance to the research and application of anti-mildew technology. In recent years, these feed anti-mildew technologies adopted abroad are worth learning.
Radiation Sterilization
After the feed is pulverized or granulated, it will infect some pathogenic bacteria such as Salmonella and Escherichia coli. After the American researchers passed the 10GP radiation, they were stored in an environment of 30 ° C and 80% relative humidity for one month. The mold did not multiply. The unradiated chick feed is mildewed after storage under the same conditions and at the same time. Therefore, after the feed is irradiated, the sterilization effect can be achieved, and the product can be stored for a long time without deterioration.
Add mold agent
There are many feed anti-fungal agents used abroad, such as potassium iodide, calcium iodate, calcium propionate, formic acid, seaweed powder and so on. According to Japanese scientific and technical personnel, a variety of anti-fungal agents are better mixed. They mix 92% seaweed powder (waka powder or kelp powder) with 4% calcium iodate and 4% calcium propionate, and add 8%. The amount is added to the feed, and it is placed in an environment of 30 ° C and 100% relative humidity, and will not be moldy for one month. The feed without the anti-fungal agent will become moldy after 5 days. A feed that only adds one of the fungicides will become moldy within 10-15 days. Therefore, Japan has mixed seaweed powder and calcium iodate to make a high-efficiency feed anti-fungal agent.
Use anti-mold packaging bag
The feed mold-proof packaging bag invented by Japanese researchers can ensure that the packaged feed does not undergo mildew for a long time. The feed mold-proof packaging bag is composed of polyolefin resin, which contains 0.01%-0.5% vanillin or ethyl vanilla. aldehyde. Since the polyolefin resin film can slowly evaporate vanillin or ethyl vanillin and penetrate into the feed, it can not only prevent mildew, but also has aroma, and can make the feed suitable for animal taste, and the outer layer of the bag is covered with A film that prevents the diffusion of vanillin or ethyl vanillin.
Chemical disinfection and radiation combined with
Russian researchers believe that the first chemical disinfection of the feed, and then radiation, not only sterilization, anti-mildew effect, but also improve the vitamin D content of the feed.
They smashed the feed to 0.2 mm, added 1.2% ammonia water or 2% propionic acid or 2% formic acid for chemical treatment, and used ultraviolet light with a strength of 120kJ/m under constant tumbling conditions. Irradiation can reduce the growth and reproduction ability of microorganisms in feed by 99.8%, long-term storage will not be mildewed, and the content of vitamin D in feed will be increased to 180 mg/kg, which is more effective than chemical sterilization alone or radiation sterilization alone. It’s much better.
Control fungal genetic code
Feed mold is often contaminated by two fungi and a parasitic Aspergillus in aflatoxins. To prevent aflatoxin biosynthesis, the fungus can be genetically altered to lose the aflatoxin-producing enzymes. Those altered fungi can successfully compete with unmodified Aspergillus to control aflatoxin contamination of the feed.
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