硒是动物生产中不可缺少的微量元素之一，其最为重要的营养生理作用是参与谷胱甘肽过氧化物酶的合成，消除体内自由基，并与雄性动物的精液品质有着重要关系。硒通过影响雄性激素的分泌，参与抗氧化酶及精子的组成，调控精子发生和成熟过程，从而最终影响精液品质。硒在公猪生产中的合理应用可显著提高生产成绩，饲粮中添加0.3 mg/kg硒有利于精液品质的改善。

Selenium is one of essential trace elements for animal production. Its most important role of nutritional physiology involved the composition of glutathione peroxide to eliminate free radicals, and has an important relationship with semen quality in male animals. Selenium, by influencing the secretion of male hormone, was involved in the composition of sperm and antioxidant enzymes, and the occurrence and maturation process of sperm, which ultimately affected semen quality. Production of selenium in the rational application of boar can significantly improve production performance. Selenium level of 0.3 mg/kg in the diet is conducive to the improvement of semen quality.［Chinese Journal of Animal Nutrition, 2010，22（6）:1488-1494］