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首页> 外文期刊>The Indian Veterinary Journal >CAUSES OF MORTALITY IN PUREBRED AND CROSSBRED DAIRY CATTLE
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CAUSES OF MORTALITY IN PUREBRED AND CROSSBRED DAIRY CATTLE

机译:奶牛和杂交牛死亡的原因

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Studies on the mortality in purebred indigenous, exotic and crossbred cattle indicate, that the Red Dane and Holstein Friesian purebred exotics had the highest mortality and the crossbreds with 75% Holstein Friesian inheritance were comparable with 50% crossbreds suggesting that crossbreds upto 75% Friesian inheritance can be maintained under the prevailing conditions. Seasonal variations as well as the variations in the mortality rate over different age groups call for improvements in the feeding and management of animals particularly during the first fortnight of the age of calves. Highest mortality due to digestive disorders and respiratory problems was noticed.
机译:对纯种本土,外来和杂种牛的死亡率进行的研究表明,红丹犬和荷斯坦弗里斯兰纯种外来动物的死亡率最高,具有75%荷斯坦弗里斯兰遗传的杂种与50%的杂种相当,这表明杂种高达75%的弗里斯兰遗传可以在当前条件下进行维护。季节性变化以及不同年龄组死亡率的变化要求改善动物的饲喂和管理,特别是在犊牛年龄的第一个两周期间。注意到由于消化系统疾病和呼吸系统疾病造成的最高死亡率。

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