水對奶牛的新陳代謝具有極其重要的作用

，奶牛維持正常的生理機能活動
，完成營養物質在體內的消化、運輸、吸收及代謝都離不開水。水占奶牛體重的65%左右，牛奶成分中水分含量約占87%。當提供充足清潔的飲水時
，奶牛將喝得更多，吃得更多
，產奶更多。奶牛每采食1千克幹物質需要攝入5千克水，奶牛每生產1升牛奶需要3～5升水
，這意味著高產奶牛每天需要150shengxinxianyinshui。shengchanzhong，yixienainiusiyanghuwangwangzhizhuyijingcusiliaodegongying
，zaiyidingchengdushanghushileyinshuidezhongyaozuoyongdaozhinainiuyinshuibuzu
，shiyujiantui，xiaohuajianhuan
，youniufayuchihuan，chengnianniuchannailiangxiajiang，shentijiankangshoudaoyanzhongsunhai。yinci，shengchanzhongbixuduinainiudeyongshuiwentiyinqizugoudezhongshi。

nainiuzaidongjihechunjiyinshuibingbushaoyuxiajiheqiuji，yuanyinzhuyaozaiyuxiajiheqiujigonggeinainiudeqinglvduozhisiliaobijiaoduo
，erdongjihechunjisuogonggeideqinglvduozhisiliaoxiangduibuzu，ganwuzhigonggeiliangjiaoduo，yinci，zaidongjihechunjiliyeyaozhuyigonggeinainiuchongzudeshui。rugeinainiugongshuibuzuhuizhijiedaozhinainiuchannailiangdexiajiangheyinfaqitagongnengwenluan。nainiujiyinbingchashui，bingchashuirongyiyinfaxiaohuabuliang
，congeryoufaxiaohuadaojibing，yanzhongyingxiangqichannailiang，zaigeinainiuyinshuishizuihaojiangshuijiaredao10℃～25℃。另外，奶牛需要全天供水，而不應按頓供水。實踐證明，冬季將部分精料用開水衝調成稀粥給奶牛飲用，可明顯提高產奶量。