动物营养学报2019，Vol.31Issue(1)：378-387,10.DOI:10.3969/j.issn.1006-267x.2019.01.045
酵母细胞壁对犊牛生长性能、营养物质表观消化率和血清免疫指标的影响
Effects of Yeast Cell Wall on Growth Performance, Nutrient Apparent Digestibility and Serum Immune Indices of Calves
摘要
Abstract
The objective of this study was to investigate the effect of yeast cell wall (YCW) on growth performance, nutrient apparent digestibility and serum immune indices of calves.A total of 30 healthy Holstein weaned male calves with similar body weight [ (112.57±8.29) kg]and days (60±5) of age were randomly divided into 5 groups with 6 replicates per group and 1 calf per replicate.The YCW additions in each group accounted for 0 (control group) , 0.20％, 0.40％, 0.80％, and 1.60％ of concentrate supplements, respectively, and dietary concentrated to forage ratio was 40:60.The experiment lasted for 60 days.The results showed as follows:1) dietary YCW could increase the average daily gain (ADG) of calves, and the ADG in 0.20％and 0.40％ groups was increased by 10.64％ and 11.70％ than that in the control group (P>0.05) ;the feed to gain ratio in 0.40％ group was decreased by 11.30％ compared with the control group (P>0.05) .On day 60 of the experiment, the chest circumference index and body index in 0.40％ and 0.80％ groups were significantly higher than those in the control group (P<0.05) .The fecal score of calves in 0.40％ group was significantly lower than that in the control group (P < 0.05) .2) The apparent digestibility of neutral detergent fibers (NDF) , acidic detergent fibers (ADF) and calcium in 0.40％ group was significantly higher than that in the control group (P<0.05) , and the ether extract (EE) apparent digestibility in 0.40％ and 0.80％ groups was significantly higher than that in the control group (P<0.05) .3) On day 30 of the experiment, the serum immunoglobulin G (IgG) content in 0.40％ group was significantly higher than that in the control group (P<0.05) .On day 60 of the experiment, the serum immunoglobulin A (IgA) content in 0.40％ group was significantly higher than that in the control group (P<0.05) , the serum IgG content in 1.60％ group was significantly higher than that in the control group (P<0.05) , the serum interleukin-4 (IL-4) content in 0.80％ group was significantly higher than that in the control group (P<0.05) , the serum tumor necrosis factor-α (TNF-α) content in control group was significantly higher than that in the other groups (P < 0.05) .It is concluded that adding yeast cell wall in the diet can enhance the body immunity of calves, reduce the diarrhea, increase the nutrient apparent digestibility and improve the growth performance.Among them, adding 0.40％ yeast cell wall has the best effect.关键词
酵母细胞壁/犊牛/生长性能/营养物质表观消化率/免疫Key words
yeast cell wall/calves/growth performance/nutrient apparent digestibility/immunity分类
农业科技引用本文复制引用
邵亚群,胡骏鹏,王之盛,王鸿泽,彭全辉,薛白,王立志,胡瑞,邹华围,康坤..酵母细胞壁对犊牛生长性能、营养物质表观消化率和血清免疫指标的影响[J].动物营养学报,2019,31(1):378-387,10.基金项目
国家重点研发计划"牛羊节本增效的精细化饲养关键技术研发" (2017YFD0502005) （2017YFD0502005）
国家肉牛牦牛产业技术体系 (CARS-37) （CARS-37）
