中文摘要：

镁是草食动物机体组织必须营养元素，在草食动物体内发挥着重要的作用。为改善镁的生物学可利用性及其在草食动物食物中的合理利用，对镁的生物学功能，草食动物镁的来源、吸收和代谢，草食动物镁营养缺乏，镁补充的营养效率进行了综述。

英文摘要：

Magnesuim, as an essential trace element, plays an important role in herbivore nutrition. In order to improve magnesian bio-availability and its reasonable usage in herbivore diets, magnesian nutrition for herbivores covering biological functions, absorption and metabolism, deficiency and surplus, sources and supplies, requirement and nutritional efficacy of magnesian supplemented in herbivore diet were reviewed.