亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Nellore bulls in Brazilian feedlots can be safely adapted to high-concentrate diets using 14-day restriction and step-up protocols

瘤胃 动物科学 形态计量学 生物 环境管理体系 肉牛 胴体重量 析因实验 兽医学 体重 数学 农学 灌溉 食品科学 生态学 医学 发酵 统计 内分泌学
作者
F. S. Parra,J. R. Ronchesel,Cyntia Ludovico Martins,Alexandre Perdigão,M. C. Pereira,D. D. Millen,Mário De Beni Arrigoni
出处
期刊:Animal Production Science [CSIRO Publishing]
卷期号:59 (10): 1858-1858 被引量:19
标识
DOI:10.1071/an18207
摘要

In the present study, the effects of restricted intake of the final finishing diet as a means of dietary adaptation compared with diets increasing in concentrate content (step-up) over periods of 14 and 21 days on growth performance, carcass characteristics, feeding behaviour and rumen morphometrics of Nellore cattle were evaluated. One hundred and twenty 20 months old Nellore bulls (initial BW = 372.2 kg, s.d. = 21.5 kg) were randomly allocated in 24 pens (n = 5 per pen) and fed for 84 days. The study had a completely randomised design with a 2 × 2 factorial arrangement: adaptation using both 14-day and 21-day step-up and restriction protocols. Each treatment was replicated 6 times. One bull per pen was slaughtered (n = 24) at the end of adaptation period to evaluate rumen morphometrics. The remaining bulls (n = 96) were slaughtered at the end of experimental period. Interactions were observed (P < 0.05) for growth performance, feeding behaviour and rumen morphometrics variables. Overall, no protocol or adaptation length main effect (P > 0.05) was observed for any of the growth rate and carcass traits evaluated, except for hot carcass weight (P = 0.03) and dressing percentage (P = 0.04), where bulls adapted for 14 days had heavier carcasses and increased dressing percentage when compared with cattle adapted for 21 days. Cattle adapted for 21 days had a larger (P = 0.005) rumen wall absorptive surface area at the end of adaptation period than those adapted for 14 days; however, no differences were detected at the end of finishing period. Thus, Nellore yearling bulls could be adapted for 14 days regardless of the protocol.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
4秒前
6秒前
10秒前
硕shuo发布了新的文献求助10
13秒前
水若琳完成签到,获得积分10
13秒前
lin发布了新的文献求助10
17秒前
tingalan完成签到,获得积分10
24秒前
充电宝应助任性的一斩采纳,获得10
41秒前
Ava应助Camille采纳,获得10
54秒前
1分钟前
Camille发布了新的文献求助10
1分钟前
1分钟前
1分钟前
1分钟前
1分钟前
1分钟前
科研通AI5应助科研通管家采纳,获得30
1分钟前
1分钟前
大模型应助小管采纳,获得50
1分钟前
juejue333完成签到,获得积分10
1分钟前
王艺霖发布了新的文献求助10
1分钟前
王艺霖完成签到,获得积分10
1分钟前
Lucas应助星星采纳,获得10
1分钟前
土豪的灵竹完成签到 ,获得积分10
1分钟前
林利芳完成签到 ,获得积分10
1分钟前
2分钟前
2分钟前
牛八先生完成签到,获得积分10
2分钟前
2分钟前
科研通AI2S应助oleskarabach采纳,获得10
3分钟前
3分钟前
3分钟前
3分钟前
3分钟前
zoey发布了新的文献求助10
3分钟前
3分钟前
zoey完成签到,获得积分10
3分钟前
4分钟前
Orange应助任性的一斩采纳,获得10
4分钟前
4分钟前
高分求助中
The Foraging Behavior of the Honey Bee (Apis mellifera, L.) 1000
Neuromuscular and Electrodiagnostic Medicine Board Review 1000
こんなに痛いのにどうして「なんでもない」と医者にいわれてしまうのでしょうか 510
いちばんやさしい生化学 500
Comprehensive Supramolecular Chemistry II 500
The First Nuclear Era: The Life and Times of a Technological Fixer 500
Avialinguistics:The Study of Language for Aviation Purposes 270
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3681643
求助须知:如何正确求助?哪些是违规求助? 3233537
关于积分的说明 9809007
捐赠科研通 2945032
什么是DOI,文献DOI怎么找? 1615035
邀请新用户注册赠送积分活动 762505
科研通“疑难数据库(出版商)”最低求助积分说明 737455