In livestock and poultry breeding, various kinds of pollution from feed are often the main factors leading to loss and failure of breeding. Therefore, when using feed, the following six kinds of pollution must be strictly prevented: Insect pests and pests Pollution and insect pests can cause feed nutrient loss, or leave toxins in the feed. When the temperature is suitable and the humidity is high, the alfalfa is harmful to the feed. Rat damage will not only cause feed loss, but also cause feed pollution and spread diseases. Microbial contaminated feed breeds harmful microorganisms such as Aspergillus flavus, Penicillium, Gibberella, and Fusarium, producing toxins such as aflatoxins, gibberellins, and zearalenone that are harmful to livestock and poultry. Aflatoxin is the most toxic. Anti-nutritional factors The main anti-nutritional factors in feeds are protease inhibitors, carbohydrate inhibitors, inhibitors of mineral element bioavailability, antagonistic vitamins, and factors that stimulate the immune system of animals. Their presence can interfere with digestion, absorption, and utilization of feed nutrients by livestock. The pollution of harmful chemical substances mainly includes three types of harmful chemical substances, such as pesticide pollution, industrial “three wastes†pollution, and nutritive mineral additive pollution. Non-nutritive additives that contaminate the effects of antibiotics, hormones, antioxidants, mildew-proofing agents, and sedatives can play a significant role in preventing diseases and improving feed utilization and growth rate. However, if they are not strictly adhered to, the use of controlled substances, and safe use And withdrawal time, drugs and their metabolites will remain in meat, eggs, milk, and through the livestock and poultry excrement pollution of the environment. The poison cross-contamination processing technology produced in the process of processing is not properly controlled, and additives with complex components in the feed will undergo degradation reactions, oxidation-reduction reactions, and generation of some complex compounds in special processing processes such as crushing, conveying, mixing, granulation, and bulking. .
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