引用本文:杨朝云, 康晓龙, 淡新刚, 周靖航, 卢鑫, 叶连萌, 赵国丽, 李鹏, 史远刚.不同剩余采食量水平的安格斯牛生长性状差异性分析[J].西南大学学报(自然科学版),2020,42(2):8~14
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不同剩余采食量水平的安格斯牛生长性状差异性分析
杨朝云, 康晓龙, 淡新刚, 周靖航, 卢鑫, 叶连萌, 赵国丽, 李鹏, 史远刚1,2
1. 宁夏大学 农学院, 银川 750021;2.
2. 宁夏现代牛业工程技术研究中心, 银川 750021
摘要:
为探究不同剩余采食量对肉牛生长性能的影响,选用体质量、年龄相近的30头安格斯牛进行81 d的饲养试验.试验结束后利用个体采食量(FI)对平均日增质量(ADG)和平均中期代谢体质量(MMBW)的回归分析估计出个体预期采食量(EFI),利用FIEFI之差计算出30头试验牛的剩余采食量,并分为低剩余采食量组(LRFI组)和高剩余采食量组(HRFI组).采用SAS 9.4中TTEST过程对LRFI组和HRFI组肉牛生长数据进行均值的差异性检验;采用SAS 9.4中CORR过程对LRFI组和HRFI组肉牛各生长数据进行相关性系数计算并作相应的显著性检验.结果表明:在所涉及的指标中,HRFI组与LRFI组间仅FI差异有统计学意义(p<0.01),其余指标差异均未达到统计学意义;LRFI组的RFI与腰角宽存在显著正相关关系(r=0.61,p<0.05)、与管围和FI之间存在极显著正相关关系(p<0.01),相关系数分别为0.71,0.78.得出LRFI组肉牛饲料转化效率高于HRFI组,较HRFI组节约8.8%的FI;且本研究涉及的各个生长指标差异均未达到显著水平.
关键词:  剩余采食量  生长性能  平均日增质量  安格斯牛
DOI:10.13718/j.cnki.xdzk.2020.02.002
分类号:
基金项目:国家自然科学基金项目(31660645).
Differential Analysis of Growth Traits in Angus Cattle on Different Levels of Residual Feed Intake
YANG Chao-yun, KANG Xiao-long, DAN Xin-gang, ZHOU Jing-hang, LU Xin, YE Lian-meng, ZHAO Guo-li, LI-Peng, SHI Yuan-gang1,2
1. School of Agriculture of Ningxia University, Yinchaun 750021, China;2.
2. Ningxia Modern Cattle Engineering Technology Research Center, Yinchuan 750021, China
Abstract:
To explore the effect of different residual feed intake levels on the growth performance in beef cattle, thirty Angus beef cattle of similar weight and age were selected for an 81-d feeding trial in this study. After the experiment was finished, the expected feed intake (EFI) was estimated by regression analysis of individual diet (feed intake, FI) to the average daily weight gain (ADG) and mean medium metabolic weight (MMBW), and then residual feed intake (RFI) of the tested cattle was calculated by the difference between FI and EFI and, ultimately, the tested cattle were divided into a low residual feeding group (LRFI group) and a high residual feeding group (HRFI group). The differential of mean value for growth performance was tested with the TTEST process in SAS 9.4. Correlation coefficient calculation and its significance test of the growth data were carried out by the CORR process in SAS 9.4. The results showed that there were significant differences in FI (p<0.01) only between HRFI group and LRFI group, and none of the remaining indicators reached the significant level of difference. There was a significant positive correlation between RFI and lumbar width in LRFI group (r=0.61, p<0.05), and a highly significant positive correlation between tube circumference and FI (p<0.01), with a correlation coefficient of 0.71 and 0.78, respectively. Conclusion:The feed conversion ratio of LRFI group was higher than that of HRFI group, and the FI was saved by 8.8% compared with the HRFI group. And differences of remaining growth traits involved in this study did not reach a significant level.
Key words:  residual feed intake  growth performance  average daily weight gain (ADG)  Angus cattle
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