Here we mainly introduce non-nutritive additive feeds, including antibiotics, enzyme preparations, microecological preparations, deworming health care agents, feed preservatives and attractant flavoring agents.
1. Antibiotics Antibiotics are mainly used to prevent diseases, promote animal growth and improve feed efficiency. Antibiotics commonly used in pig diets are: olaquindox, zinc bacitracin, colistin sulfate, fast fat, arsenic acid, tylosin, oxytetracycline, chlortetracycline, flavomycin, bamboo Dopmycin, penicillin, etc. In addition, sulfonamides, high copper and organic arsenic also have antibacterial and growth promoting effects.
2. Enzyme preparations Enzymes used as feed additives can help animals make better use of protein, starch, fat and cellulose in feed. These include proteases (pepsin, trypsin, etc.), amylases (amylases, -amylases, and pullulanase), cellulases, trypsin, saccharide-degrading enzymes (lactolytic enzymes and -glucose). Enzyme) and so on. Enzyme preparation can promote growth and development and improve feed digestibility. The effect of the enzyme preparation is more obvious because the weaning stress and digestive function of the young pig are not perfect. Collier and Hardy (1986) reported that the addition of formulations containing individual proteases, amylases, and glucanases to corn, wheat, and bean cake-based diets for feeding weaned piglets significantly increased daily gain. And feed efficiency.
3. Microecological preparations The addition of microecological preparations to compound feeds mainly refers to beneficial microorganisms or oligosaccharides which have a regulating effect on intestinal microorganisms. Microorganisms mainly include: Lactobacillus, Streptococcus, Bifidobacterium, Certain Bacillus, Yeast, Non-toxic Enterobacter and Enterococcus.
4. Deworming health care agents are mycin A, hygromycin B, amprolium hydrochloride, salinomycin and the like.
5. Acidifier The acidifier is mainly used to change the performance of early weaned pigs. The effect of citric acid and fumaric acid has been affirmed.
6. Antioxidants and Preservatives Unsaturated fatty acids in the diet are most likely to be destroyed by vitamin A, vitamin D and vitamin E. To prevent oxidative deterioration of the feed, add antioxidants to the feed. Commonly used antioxidants are ethoxyquinoline, dibutylhydroxytoluene (BHT), and dibutylhydroxyanisole (BHA). Vitamin E and ascorbic acid are also commonly used as feed antioxidants in foreign countries.
7. The attractant flavoring agent has aromatizing and attracting effects, which can increase the appetite of the animal and increase the feed intake. Such as MSG, saccharin, various flavors and so on.
8. Dispersing agent is also called anti-caking agent, especially salt and urea are most easy to absorb moisture and agglomerate. Adding a small amount of dispersing agent to feed or additive can prevent caking. Commonly used fluxing agents are calcium silicate, calcium stearate, silica, sodium aluminum silicate, zeolite powder and the like.
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