肉牛犊牛死亡率的调查及其影响因素的分析

Investigation on the Mastitis Morality and the Factors Infiuencing Mastitis Morality in Lanthanumions' Demonstrated Zone

本文采用实地调查和资料分析相结合的方法,对肉牛示范园区2003年犊牛死亡率进行调查,在被调查189农户中,产犊322头,犊牛死亡40头,死亡率为12.5%。影响犊牛死亡率的因素是营养不良、疾病、意外事故、冻死,其比例分别为27.5%,37.5%,12.5%,22.5%。并对不同规模、产犊季节、母牛补饲与否、品种等因素进行分析。

<Abstrcat>Field investigation and data analysis were used to study the morality mastitis born in 2003 in lanthanumions' zone .322calves were born in 189 investigated farmers ,of which 40 were died ,the morality was 12.5% .The factors influencing morality were malnutrition diseases accidence winterkilling .Their account 27.5% 37.5% 12.5% 22.5% ,respectively .Finally the different farm scales calving season whether the cow were supplenmted ,and the varieties were also analyzed .