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首页> 外文期刊>Tropical Animal Health and Production >Relationship between gain rate during the growing phase and forage allowance in the finishing phase in Nellore cattle
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Relationship between gain rate during the growing phase and forage allowance in the finishing phase in Nellore cattle

机译：NELLORE牛整理阶段增长阶段和牧草津贴之间的关系

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The study evaluated the effect of gain rates during the growing phase and the possible interaction with finishing phase forage allowance in beef cattle. In Exp. 1, eighty Nellore cattle (386 +/- 7.90 kg; divided into 16 paddocks) were used in a randomized block design in a 2 x 2 factorial arrangement of treatments: (1) gain rate during the growing phase (low and high); (2) forage allowance during the finishing phase (low and high). In Exp. 2, twelve cannulated animals were used to evaluate ruminal parameters at the finishing phase. The animals were supplemented (2% of body weight [BW]) during 112 days. The average forage mass was 6507 and 2712 kg DM/ha, resulting in a forage allowance of 2.91 and 1.31 kg DM/kg BW, respectively, for high and low supply. In Exp. 1, there was interaction among factors (P = 0.01) for average daily gain (ADG): low gain rate animals that were finished on high forage allowance had an ADG 0.203 kg/day greater than average of other treatments (0.917 kg/day). Animals with a high gain rate in the growing phase started the finishing phase 51.5 kg heavier than low gain rate animals; this difference dropped to 35.5 kg in final BW (P < 0.01). In terms of the carcass, this difference was 27 kg at the beginning and dropped to 25 kg at the final carcass weight (P < 0.01). In Exp. 2, the acetate concentration at the end was higher for animals fed high forage allowance compared to low. However, propionate concentration was higher for animals fed low forage allowance compared to high (P = 0.01). Our results showed that the growing phase influences performance during the finishing phase; however, forage allowance with high supplementation at the finishing phase had negligible effects under these experimental conditions.
机译：该研究评估了增益期间的增益率和牛肉中整理阶段饲料津贴的可能相互作用。在exp。 1，八十次牛（386 +/- 7.90公斤;分为16个围场）用于随机块设计中的2×2因子治疗排列：（1）在生长相（低和高）期间的增益率; （2）精加工阶段（低和高）期间的牧草津贴。在exp。如图2所示，使用12个插管动物在精加工阶段评估瘤胃参数。在112天内补充了动物（2％的体重[BW]）。平均散种质量为6507和2712千克DM / HA，分别为2.91和1.31千克DM / kg BW的牧草含量，用于高电源。在exp。 1，因子之间的相互作用（p = 0.01），平均每日增益（ADG）：在高饲料津贴上完成的低增益率为动物的ADG 0.203千克/天大于其他治疗的平均值（0.917kg /天） 。增长阶段的高增益率的动物开始比低增益率更重51.5千克;在最终BW中，这种差异降至35.5千克（P <0.01）。就胴体而言，该差异在开始时为27千克，最终胎体重量下降至25kg（P <0.01）。在exp。如图2所示，与低温相比，喂食高牧草津贴的动物的醋酸盐浓度较高。然而，与高（P = 0.01）相比，喂养低腐殖余量的动物的丙酸浓度较高。我们的研究结果表明，日益增长的阶段在整理阶段影响性能;然而，在整理阶段的高补充的饲料津贴在这些实验条件下具有可忽略的效果。

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