二、急於求成:不少奶牛戶在犢牛出生未足18月齡、體重僅有250公斤時就配種,第1胎常發生難產,陰戶破裂,影響了下一胎正常繁殖。因此,養牛戶不能急於求成,應加強犢牛、育成牛的飼養管理,達到350~400公斤,方可進行初配。
三、超量擠奶:一般奶牛泌乳期為305天tian,而er一yi些xie奶nai牛niu戶hu對dui奶nai牛niu從cong產chan後hou一yi直zhi擠ji到dao沒mei有you奶nai時shi方fang停ting止zhi,結jie果guo奶nai牛niu過guo度du消xiao耗hao體ti內nei營ying養yang,致zhi使shi奶nai牛niu較jiao難nan受shou孕yun進jin而er影ying響xiang到dao泌mi乳ru量liang的de提ti高gao。所suo以yi必bi須xu在zai泌mi乳ru期qi內nei擠ji乳ru,讓rang奶nai牛niu有you充chong分fen時shi間jian彌mi補bu體ti內nei損sun失shi的de營ying養yang。
四、幹奶期減料:奶牛經過產犢泌乳,體內營養損失多,加上懷孕、peitaifayuduiyingyangdexuyao,junxuzaigannaiqihuifubuchongyingyang,bushaoyangnainiuhuwurenweibujinaishiyingweichaxie,dafujianshaojingliaoweiliang,jieguozaochenglinchanqianchengxiadengpiaoqing,chandufeishi,duniutizhiruo,muniuchannailiangdi。youcikejian,nainiuchuganggannaihoujitianhelinchanqianjitianshidangjianshaojingliaoweiliangwai,gannaiqiweiliaoliangyizhanmuniutizhongde0.8%~0.9%為宜。
五、係樁拴養:大da多duo數shu養yang奶nai牛niu戶hu不bu分fen四si季ji把ba母mu牛niu用yong繩sheng係xi頸jing部bu拴shuan養yang,不bu僅jin限xian製zhi了le犢du牛niu活huo動dong,而er且qie嚴yan重zhong阻zu礙ai了le犢du牛niu的de生sheng長chang發fa育yu,導dao致zhi奶nai牛niu難nan產chan,胎tai衣yi不bu下xia,發fa情qing不bu明ming顯xian,體ti質zhi差cha等deng不bu良liang反fan應ying。應ying讓rang犢du牛niu在zai犢du牛niu欄lan內nei自zi由you活huo動dong,定ding時shi飼si喂wei,以yi促cu進jin奶nai牛niu的de新xin陳chen代dai謝xie,增zeng加jia食shi欲yu,保bao持chi正zheng常chang繁fan殖zhi,提ti高gao抗kang病bing能neng力li。
六、不刷拭牛體:奶牛皮膚對外界塵土敏感,當被毛附有幹糞便時,奶牛感到不舒服,常用舌舐,用身體擦牆、槽等方式解除身上的奇癢,嚴重影響奶牛身體健康。所以應保持牛體衛生清潔,每天用刷子刷拭1次。
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