中文摘要：

在奶牛围产期,营养状况直接影响到奶牛疾病的发生。对于高产奶牛,由于奶牛体内的钙流失或者能量出现负平衡,容易产生乳热、酮病、脂肪肝等疾病,通过改善妊娠后期奶牛营养可减少这些疾病的发生。围产期奶牛的感染性疾病的易感性取决于免疫系统的完整性,而营养因素可影响机体免疫功能;其它非感染性疾病也可以通过改善营养状况来加以预防。

英文摘要：

During transition period,the nutrition situation directly affects the dairy cow’s health. To highly-productive dairy cows, because the loss of the dairy cow’s calcium or the negative balance of the power it easily leads to milk fever,ketosis etc. Through perfecting the dairy cow’s nutrition in the late pregnancy,these diseases could be lessened. The susceptibility of the infectious diseases of the cow in transition period depends on the integrity of the immune system,and the nutrition’s elements can affect the immune functions of the organism; other on infectious diseases can also be prevented through perfecting nutritious situation.