动物营养学报2018，Vol.30Issue(6)：2402-2410,9.DOI:10.3969/j.issn.1006-267x.2018.06.046
开食料中不同中性洗涤纤维水平对犊牛屠宰性能、器官指数及复胃发育的影响
Effects of Starters with Different Neutral Detergent Fiber Levels on Slaughter Traits, Organ Indexes and Development of Stomachus Compositus of Dairy Calves
摘要
Abstract
The objective of this study was to determine the effects of starters with different neutral detergent fi-ber ( NDF) levels on slaughter traits, organ indexes and development of stomachus compositus of dairy calves. Sixty newborn dairy calves (24 females and 36 males) with similar birth weight [(42.0±2.5) kg] and enough colostrum supplemented were randomly assigned to four groups with 9 male and 6 female calves each group. All calves were weaned at 70 days of age. Groups A, B, C, and D were fed one of the four starters with NDF levels ( measured values) of 12. 85％, 19. 91％, 26. 99％, and 34. 04％, respectively. The experiment lasted for 112 days. The results showed as follows:body weight gain in group B was significantly higher than those in groups C and D (P<0.05). Dressing percentage and net meat rate in group B were significantly higher than those in group D ( P<0.05) . Group B also had higher carcass weight, ratio of meat to bone and meat percent-age of carcass compared with the other three groups, but the differences were not significant ( P>0.05);about the development of stomachus compositus, rumen weight percentage of stomachus compositus total weight and reticulum weight percentage of stomachus compositus total weight were significantly higher in group B than in group D ( P<0.05) , while omasum weight percentage of stomachus compositus total weight was significantly higher in group D than in group A ( P<0.05);groups A and B had significantly higher pH in rumen compared with groups C and D ( P<0.05) . In conclusion, starter with 19.91％ NDF for dairy calves at 15 to 112 days of age can improve the body weight gain, slaughter traits, and promote the development of organs and gastroin-testinal tracts.关键词
荷斯坦犊牛/中性洗涤纤维水平/开食料/采食量/屠宰性能/器官指数/复胃发育Key words
dairy calf/neutral detergent fiber level/starter/feed intake/slaughter trait/organ index/stom-ach development of stomachus compositus分类
农业科技引用本文复制引用
任春燕,毕研亮,杜汉昌,于博,屠焰,郭艳丽,刁其玉..开食料中不同中性洗涤纤维水平对犊牛屠宰性能、器官指数及复胃发育的影响[J].动物营养学报,2018,30(6):2402-2410,9.基金项目
国家重点研发计划"幼龄反刍动物消化道微生物演替与肠道发育调控"(2017YFD0500502) （2017YFD0500502）
