| 全混合日粮营养水平对热应激肉牛生长性能、瘤胃形态学及肉质的影响 |
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| 引用本文： | 张涛,郭俊清,武卫卫,马高峰,赵作帅,陈鹏举.全混合日粮营养水平对热应激肉牛生长性能、瘤胃形态学及肉质的影响[J].中国饲料,2022,1(4):57-60. |
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| 作者姓名： | 张涛 郭俊清 武卫卫 马高峰 赵作帅 陈鹏举 |
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| 作者单位： | 张 涛1，郭俊清2，武卫卫3，马高峰3，赵作帅4，陈鹏举2，4*（1.焦作市动物卫生监督所，河南焦作 454003,2.河南省现代中兽医研究院，河南郑州 450002,3.焦作市农科利来生物科技有限公司，河南焦作 454003,4.山东鑫德慧生物科技有限公司，河南郓城 274700） |
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| 基金项目： | 国家重点研发计划项目(2017YFD0501400)。 |
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| 摘 要： | 文章旨在评估热应激条件下通过调整全混合日粮营养水平来改善肉牛生长性能、瘤胃形态学及肉品质.试验将6月龄大、平均体重为(85.08±2.31)kg的64头荷斯坦肉牛随机分为2组,每组8个重复,每组32头.从6月龄开始试验,两组肉牛分别饲喂粗蛋白质水平为16.0％和12.0％的全混合日粮,持续到15月龄.整个试验期间外界环...
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| 关 键 词： | 全混合日粮 营养水平 热应激 肉牛 生长性能 肉品质 形态学 |
Effects of total mixed ration nutrient levels on growth performance,rumen morphology and meat quality of heat-stressed beef cattle |
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| ZHANG Tao,GUO Junqing,WU Weiwei,MA Gaofeng,ZHAO Zuoshuai,CHEN Pengju.Effects of total mixed ration nutrient levels on growth performance,rumen morphology and meat quality of heat-stressed beef cattle[J].China Feed,2022,1(4):57-60. |
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| Authors: | ZHANG Tao GUO Junqing WU Weiwei MA Gaofeng ZHAO Zuoshuai CHEN Pengju |
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| Institution: | (Animal Health Supervision of Jiaozuo City,Jiao zuo,Henan Province 404003,China;Henan Institute of Modem Chinese Veterinary Medicine,ZhengZhou,Henan Province 400002,China;Jiaozuo Nongkelilai Biotechnology Co.LTD,Jiao zuo>Henan Province 404003,China;Shandong Xindehui Biotechnology Co.,Ltd,Yuncheng,Henan Province 274700,China) |
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| Abstract: | The purpose of this study was to evaluate the improvement of growth performance,rumen morphology and meat quality of beef cattle under heat stress by adjusting nutrient level of total mixed diet.Sixty-four 6-month-old Holstein beef cattle with an average body weight of(85.08±2.31)kg were randomly divided into 2 groups with 8 replicates per group and 32 cattle per group(4 head/replicate).Starting from 6 months of age,beef cattle in both groups were fed a total mixed diet with crude protein level of 16.0%and 12.0%,respectively,and continued to 15 months of age.During the whole experiment,the ambient temperature was(36±2.5)℃and the relative humidity was 65%~70%.Results:There were no significant differences in the effects of different nutrient levels on daily gain and feed/gain of beef cattle during the whole experiment period(P>0.05).The body weight,average daily gain and feed intake of beef cattle at 10 and 15 months of age,6~10 months of age and feed/gain of beef cattle at 11~15 months of age in high nutrition group were significantly higher than those in low nutrition group(P<0.05),but the feed/gain of beef cattle at 11~15 months of age was significantly lower than that in low nutrition group(P<0.05).The length of rumen nipple and cuticle thickness of beef cattle in high nutrition group were significantly increased by 38.53%and 43.98%compared with low nutrition group(P<0.05).However,rumen pH value,papillary width,connective tissue width and non~keratinized epithelial thickness were significantly decreased by 2.89%,37.78%,42.08%and 34.99%(P<0.05),respectively.Slaughter rate,hot carcass weight and crude fat content in muscle of beef cattle in high nutrition group were significantly increased by 10.21%,21.87%and 25.20%(P<0.05),respectively,while ash content in muscle of beef cattle in low nutrition group was significantly increased by 27.17%(P<0.05)compared with that in high nutrition group.Conclusion:Under the conditions of this study,the feed intake and feed efficiency of beef cattle under high temperature environment can be improved by changing the total mixed diet formula,and the daily gain of beef cattle under high nutrient level diet group can be improved,and rumen morphological indexes of beef cattle under heat stress environment can be improved. |
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| Keywords: | total mixed ration nutrient level beef heat stress growth performance meat quality morphology |
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