中国农业大学学报2025，Vol.30Issue(3)：1-12,12.DOI:10.11841/j.issn.1007-4333.2025.03.01
营养限制与恢复对西门塔尔公牛补偿生长性能的影响
Effects of feed restriction and subsequent realimentation on the compensatory growth of Simmental bulls
摘要
Abstract
To analyze the effects of restricted feeding and realimentation on the growth performance,digestive metabolism,blood physicochemical indexes,carcass performance,and meat quality in Simmental bulls.15 Simmental bulls with an average weight of(475±3.8)kg at about 13 months of age were randomly divided into three treatment groups based on weight:C(control group,ad libitum feeding),R(moderate restriction group,restricted to 80％of the control group),and S(severe restriction group,restricted to 60％of the control group),with five bulls in each group.The feed restriction lasted for 60 days,followed by a 72-day recovery period with unrestricted feeding for all groups.During the nutritional recovery phase,there were no restrictions on feed intake for each group.The results showed that:1)By the end of the realimentation period,there was no significant difference in the weight between the restricted groups and the control group(P＞0.05).During the realimentation phase,the apparent digestibility of crude protein in the R group was significantly higher than during the restriction phase(P＜0.01).In the S group,The apparent digestibility of crude protein,crude fat and neutral detergent fiber was significantly higher during the realimentation phase compared to the restriction phase(P＜0.05),with crude protein digestibility being extremely significant increase(P＜0.01).2)By the end of the restriction period,serum free fatty acid(NEFA)levels in the restricted groups were significantly higher than in the control group(P＜0.05),while serum β-hydroxybutyrate(BHB)levels were significantly lower(P＜0.05).However,by the end of the realimentation period,there were no significant differences in the levels of these substances among the treatment groups(P＞0.05).3)By the end of the realimentation period,there was no significant difference in the weight and meat quality of the main organs and tissues between the restricted feeding group and the control group(P＞0.05).In conclusion,moderate nutritional restriction can enhance the digestibility of crude protein and neutral detergent fiber without negatively impacting body weight,major organ tissue weight,or meat quality in cattle.These findings provide scientific evidence for optimizing feed management and improving beef quality,contributing to better economic returns and resource efficiency in the livestock industry.关键词
限饲/补偿生长/西门塔尔/胴体品质/消化代谢Key words
feed restriction/compensatory growth/Simmental/carcass quality/digestive metabolism分类
畜牧业引用本文复制引用
阿卜杜赛米江·阿不都克里木,季长臻,秦肖莉,伊思蒙,伊敏·图尔荪,曹兵海,苏华维..营养限制与恢复对西门塔尔公牛补偿生长性能的影响[J].中国农业大学学报,2025,30(3):1-12,12.基金项目
国家重点研发计划项目(2022YFD1602310,2022YFD1601308) （2022YFD1602310,2022YFD1601308）
国家现代农业产业技术体系(CARS-37) （CARS-37）
