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A feed additive is a food supplements for farm animals that cannot get enough nutrients from regular meals that the farmers provide and include vitamins, amino acids, fatty acids, and minerals. In some cases if an animal does not have some specific nutrition in its diet it may not grow properly. The nutritional values of animal feeds are influenced not only by their nutrient content, but also by many other factors. These include feed presentation, hygiene, digestibility, and effect on intestinal health. Even with all of the benefits of higher quality feed, most of a farm animal's diet still consists of maize, wheat and soybean meal because of the higher costs of quality feed.〔Merck Manual October 2014 (Nutritional Requirements of Beef Cattle ) Page accessed March 18, 2015〕〔Merck Manual October 2014 (Nutritional Requirements of Beef Cattle ) Page accessed March 18, 2015〕〔Merck Manual March 2012 (Requirements of Beef Cattle ) Page accessed March 18, 2015〕 == Types of feed additives in the European Union== A sensory additive an additive that stimulates the appetite, improving the voluntary intake of a diet. Examples include feed flavors or sweeteners. A nutritional additive provides specific nutrients for an animal for optimal growth. Vitamins and aminoacids fall into this category. A zootechnical additive improves the nutritional value of a diet. It doesn't give nutrients directly to the animal, but through its diet. This category includes, among others, enzymes and certain phytogenics. Coccidiostats and histomonostats control the health of poultry through direct effects. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「feed additive」の詳細全文を読む スポンサード リンク
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