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首页> 外文期刊>Crop and Pasture Science >The effect of pre- and post-natal nutrition on the growth of beef cattle. 3. The effect of severe restriction in early post-natal life on the development of the body components and chemical composition
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The effect of pre- and post-natal nutrition on the growth of beef cattle. 3. The effect of severe restriction in early post-natal life on the development of the body components and chemical composition

机译：产前和产后营养对肉牛生长的影响。 3.严格限制产后早期生活对身体成分和化学成分发展的影响

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摘要

The effects of restricted growth of cattle both before and after birth, of the neth hod of their nrealimentation, and of sex on (I) body and carcass composition, (2) the weights of visceral com- nponents, (3) the weights of selected individual muscles and bones, and (4) the heights of the animals nat the withers and pelvis were ascertained. Castrate male and entire female cattle were slaughtered nwhen their liveweights reached 400 and 370 kg respectively. Other male and female calves were nslaughtered at 200 days of age following a controlled feeding period on either a high or a low plane ndiet. nAlthough pre-natal nutrition significantly (P < 0.05) affected the height of the calves at 3 days nof age, it had no lasting effect on this or other components. nWhen adjusted to the same empty body weight or carcass weight, animals restricted in growth nthen intensively realimented had (P < 0.01) more fat and less protein, water and ash than animals nunrestricted in growth and later fed intensively. Animals finished on pasture had (P < 0.01) less nfat and more protein, water and ash than the intensively finished calves, but their composition was nunaffected by the controlled feeding treatments. nSignificant differences (P < 0.01) between restricted and unrestricted animals in the percentage nwater or protein in the fat-free mass at the end of the controlled feeding period were eliminated nwhen the animals had recovered. nThe weights of visceral components, individual muscles and bones were not influenced by the nlevel of nutrition during the controlled feeding period. Animals finished on pasture had (P < 0.01) nmore blood, heavier livers, heavier individual muscles and bones than the intensively finished animals. nThey also had (P < 0.01) lighter fasted liveweight, empty body weight, hot carcass weight, dressing npercentage and heavier wet rumen-reticulum contents than the intensively finished cattle. nAlthough the pasture finished animals were (P < 0.01) shorter at 200 and 300 days of age than nthe intensively finished animals, they were (P < 0.01) taller just prior to slaughter. nIt is suggested that meat-producing animals can overcome restrictions imposed on growth nimmediately after birth to attain marketable weight on either pasture or intensive feeding.
机译：牛出生前和出生后生长受限，营养状况和性别的差异对（I）身体和car体组成，（2）内脏成分重量，（3）体重的影响（4）确定枯萎和骨盆的动物的身高。当活重分别达到400公斤和370公斤时，将rate割的公牛和整个母牛宰杀。在控制饲喂期后，在高或低平面ndiet上，于200天龄屠杀其他雄性和雌性小牛。 n尽管产前营养在初生3天时显着影响了犊牛的身高（P <0.05），但对这种或其他成分没有持久的影响。 n当调整为相同的空体重或car体重量时，与不受生长限制的动物相比，集约化生长受限的动物的脂肪，蛋白质，水和灰分含量高（P <0.01），而蛋白质，水和灰分较少，之后被大量喂养。在牧场上饲养的动物比集中饲养的小牛的脂肪少（P <0.01），蛋白质，水和灰分更多，但是它们的组成不受控制饲喂处理的影响。当控制的喂养期结束时，限制动物和非限制动物在无脂肪食物中的n水或蛋白质的百分比之间的显着差异（P <0.01）被消除了。 n在控制喂养期间，内脏成分，单个肌肉和骨骼的重量不受营养水平的影响。与集约化饲养的动物相比，在牧场上饲养的动物的血液（P <0.01）多，肝脏重，个体肌肉和骨骼重。 n他们的空腹体重，空体重，hot体重量，敷料百分比和瘤胃网状湿质含量也比精加工牛高（P <0.01）。 n尽管在200和300日龄时，牧场饲养的动物比集约化饲养的动物短（P <0.01），但在屠宰前它们要高（P <0.01）。 n有人建议，产肉动物可以在出生后立即克服对生长的限制，以达到牧场或集约化饲喂的适销体重。

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  • 来源
    《Crop and Pasture Science》 |1980年第1期|p.191-204|共14页
  • 作者

    GD Tudor DW Utting and PK ORourke;

  • 作者单位

    Queensland Department of Primary Industries, Animal Rcsearch Institute, Yeerongpilly, Qld 4105. " Queensland Department of Primary Industries, P.O. Box 1085, Townsville, Qld 48 10.;

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