Holló Gabriella, Nagy-Kiszlinger Henrietta, Tossenberger János, Török Márton, Húth Balázs
Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, Guba Sándor Str. 40, H-7400 Kaposvar, Hungary.
National Association of Hungarian Charolais Cattle Breeders, Vologda u. 3, H-3525 Miskolc, Hungary.
Animals (Basel). 2021 Dec 24;12(1):35. doi: 10.3390/ani12010035.
This study evaluated the effect of differences in residual feed intake (RFI) of Charolaise candidate young bulls on feeding behavior and self-performance test results. Bulls were classified into high and low RFI (H-RFI, L-RFI) groups. Bulls were fed in a HOKOFARM system to measure individual animal intake and behavior. L-RFI bulls had significantly lower feed intakes ( = 0.002) and higher gain to feed ratio ( = 0.001), lower intake per day/kg DM (dry matter) ( = 0.002) and lower intake g/body weight/day ( < 0.001). L-RFI animals had lower visits number per day ( = 0.02), but spent longer time per visit ( = 0.02), and tended to have higher intake g/visit ( = 0.06) on feeders. The correlation between RFI and DMI (dry matter intake)/bodyweight/day as well as intake per day/kg were large and positive. Back-loin length and rump length, and moreover muzzle width and frame, showed negative correlations with RFI value. However, bulls with better RFI values associated with lower legs score. Results reveal that RFI was shown beneficial correlations with economically relevant self-performance traits. Further investigations are needed to seek additional indicator traits that are predictive for RFI.
本研究评估了夏洛莱候选青年公牛剩余采食量（RFI）差异对采食行为和自身性能测试结果的影响。公牛被分为高RFI和低RFI（H-RFI、L-RFI）组。公牛在HOKOFARM系统中饲养，以测量个体动物的采食量和行为。L-RFI公牛的采食量显著较低（ = 0.002），料重比更高（ = 0.001），每天每千克干物质（DM）的摄入量较低（ = 0.002），每天每体重克的摄入量较低（ < 0.001）。L-RFI动物每天的访问次数较少（ = 0.02），但每次访问花费的时间较长（ = 0.02），并且在采食器上每次访问的摄入量往往较高（ = 0.06）。RFI与干物质摄入量（DMI）/每天体重以及每天每千克摄入量之间的相关性大且为正。腰背部长度和臀部长度，此外还有口鼻宽度和体格，与RFI值呈负相关。然而，RFI值较好的公牛小腿评分较低。结果表明，RFI与经济相关的自身性能性状呈有益的相关性。需要进一步研究以寻找对RFI具有预测性的其他指标性状。
