Feed anti-mildew technology in foreign farms

In the domestic anti-mildew methods are dry anti-mold law, hypoxia anti-mildew law, acetic acid anti-mold law, calcium propionate (sodium) anti-mildew law, please look at the following foreign anti-mildew technology.

During the storage, transportation, sale and use of feed, mildew easily occurs, and a large amount of growth and reproduction of mold-contaminated feed not only consumes nutrients in the feed, but also degrades feed quality, reduces feed remuneration, and feeds livestock and poultry. Caused by diarrhea, intestinal inflammation, reduced ability to digest, decreased lymph function and other symptoms, can cause serious deaths, so foreign feed manufacturers and researchers, attaches great importance to the research and application of anti-mildew technology. In recent years, the feed anti-mildew technologies used in China and abroad mainly include the following types.

First, radiation sterilization

After the feed is crushed or granulated, it will infect some pathogenic bacteria such as Salmonella and E. coli. U.S. researchers radiated chicken chicks with 10 GP radiation and stored them for 30 minutes at 80% relative humidity. The molds did not multiply; unirradiated chicks were stored under the same conditions and at the same time. After mildew occurs, the radiation feed can achieve sterilization effect and can be stored for a long time without deterioration.

Second, add anti-mold agent

There are many antifungal agents used abroad, such as potassium iodide, calcium iodate, calcium propionate, formic acid, seaweed powder, and orange peel alcohol extracts. According to research by Japanese scientists and technicians, it is better to use a variety of anti-mold agents. They mix 92% of seaweed powder (wakame powder or kelp powder) with 4% calcium iodate and 4% calcium propionate, according to 8%. The added amount is added to the feed, placed in a 30°C, 100% relative humidity environment, will not be mildew within one month, and the feed without the fungicide will be mildewed in 5 days; add one of them The fungicide feed will produce mildew from 10 to 15 days. Therefore, Japan will mix seaweed powder and calcium iodate to produce a highly effective feed fungicide.

Third, the use of anti-mildew bags

The Japanese researchers invented the feed anti-mildew package to ensure that the packaged feed does not form mildew for a long time. The feed anti-mildew package is made of polyolefin resin and contains 0.01% to 0.50% vanillin or ethyl. Vanillin. Because the polyolefin resin film can slowly evaporate vanillin or ethyl acetal and penetrate into the feed, it not only can prevent mold, but also can make the feed suitable for the taste of animals, the outer layer of the bag due to the aromatic taste. Also covered is a film that prevents the diffusion of vanillin or ethyl vanillin, and the content of vanillin or ethyl vanillin in the polyolefin resin is at least 0.01%, preferably about 0.50%. If the content is low, the anti-mold property is poor; if the content is too high, it will affect the formation of the film.

Fourth, chemical disinfection and radiation combined with mildew

Researchers from the former Soviet Union believed that chemically disinfecting the feed and then irradiating it would not only have good sterilization and anti-mold effect, but also increase the vitamin D content in the feed. They pulverized the feed to 0.2mm, added a 1.2% ammonia equivalent or 2.0% propionic acid or 2.0% formic acid for chemical treatment, and applied 120 kJ/m ultraviolet light under constant turning conditions. Irradiation can reduce the growth and reproduction of microorganisms in the feed by 99.8%, prevent mildew in long-term storage, and increase the amount of vitamin D in the feed to 180mg/kg, which is more effective than chemical sterilization or radiation sterilization alone. It's much better.

V. Controlling the genetic code of fungi

Feed moldy feed to the living is contaminated by two kinds of fungal fungus and Aspergillus parasiticus of aflatoxin. In order to prevent the biosynthesis of aflatoxin, genetic methods can be used to change the fungus and lose the aflatoxin producing enzymes. Those fungi that have been changed can successfully compete with unchanged Aspergillus to control the contamination of feed with aflatoxin.

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