微量元素锌在畜禽养殖中的作用

综述了微量元素锌在家畜家禽养殖方面所发挥的作用。锌主要通过影响多种酶来实现其对畜禽皮肤、生殖性能、腿部关节的多种作用，尤其是对鸡、猪和奶牛的作用较大。锌的用量过多过少，都会引起动物相应的营养代谢性疾病，甚至死亡。锌的利用率受到锌化合物的种类、饲料、动物个体、其他元素和矿物质等方面的影响。锌的氨基酸螯合物除了具有锌的作用外，还能显著提高动物的生产性能，且污染少，符合当代绿色养殖的潮流，但其更多实际应用和生理作用的拓展，还有待于进一步研究和开发。

Review on Roles of Trace Element Zinc in Raising of Livestock and Poultry

The roles of zinc in rising of livestock and poultry were reviewed. By way of affection to enzymes zinc realize its multifunction to the derma, reproductive abilities and arthroses in domestic animals and poultry, especially to chicken, swine and cow. Corresponding nutritional diseases can be caused and the patients even can die when zinc is supplied either deficiently or excessively. The bioavailability of zinc is dependent upon species of zinc compounds, feeds, animal individuals and other nutrients as well as minerals given to the animals. Zinc amino acid complexes not only have the functions as zinc additives but also can significantly enhance the productive performance of animals and cause less pollution to environment than that of inorganic zinc, which accords with the requirements of green breeding trend but it still needs a long way to go to develop and explore the practical utilities and physiological functions of zinc amino acid complexes.