363 Effects of supplementation of vitamin B complex on the performance of beef calves during a 42-d preconditioning program

IF 2.7 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Erica Ferri, Aline Rezende, Ana Laura Ramalho, Carlos Eduardo Dos Santos, Matheus Ferreira, Jeff S Heldt, Chance G Farmer, Juliana Ranches
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引用次数: 0

Abstract

The objective of this study was to evaluate the effects of supplementation of vitamin B complex on post-weaning performance of beef calves. The study was conducted during fall of 2023 at Eastern Oregon Agriculture Research Center (EOARC; Burns, OR). At weaning (d 0), 63 calves [Angus × Hereford; body weight (BW) = 252 ± 3.6 kg] were randomly assigned to 1 of 3 treatments: 1) Control, 2) VitB1, or 3) VitB2. Calves assigned to Control treatment served as a negative control and were not supplemented with vitamin B complex. Calves assigned to treatment VitB1 were supplemented at 1g/calf daily, while calves assigned to VitB2 treatment were supplemented at 2g/calf daily of vitamin B complex during the 42 d of preconditioning. Upon weaning processing, calves were allocated to 21 pens (3 calves/pen) and treatments were allocated to each pen (7 pens/treatment). Vitamin B complex [Vivalto, pantothenic acid (B5; 40,000 mg/kg), pyridoxine (B6; 20,000 mg/kg), folic acid (B9; 3,200 mg/kg), biotin (B7; 3,200,000 mcg/kg), cobalamin (B12; 320,000 mcg/kg); Selko USA, Indianapolis, IN] supplementation was offered at pen level beginning on d 1 and until the end of the preconditioning phase (d 42). Vitamin B complex was offered to calves assigned to vitamin B complex treatment mixed with 1.3 kg of dried distiller’s grains. Additionally, calves had free access to chopped alfalfa-grass hay mix and whole corn. Pen intake was recorded daily. On d 0, BW and blood samples were collected from all calves. Additional blood and BW were collected on d 1, 3, 7, 14, 21, 42 post-weaning. Body weights were used to calculate calf average daily gain (ADG) and blood samples were assayed for acute phase proteins (ceruloplasmin and haptoglobin). Additional blood samples will be analyzed for cortisol and vitamin B concentrations. Variables were analyzed considering pen as the experimental unit and pen(treatment) as a random effect. Blood variables were evaluated as repeated measures and effects of treatment, day, and treatment the interactions were analyzed with the MIXED procedure of SAS (SAS Inst. Inc., Cary, NC). Significance was set at P ≤ 0.05. No treatment effects (P = 0.98) were observed for final BW (283, 283, and 284 kg respectively for Control, Vit1, and Vit2) or for ADG (P = 0.53; 0.735, 0.795, and 0.747 kg/d respectively for Control, Vit1, and Vit2). Similarly, no treatment effects were observed for the acute phase proteins analyzed, ceruloplasmin (P = 0.66; 27, 30, and 33 µg/dL respectively for Control, Vit1, and Vit2) and haptoglobin (P = 0.41; 0.55, 0.62, and 0.59 mg/mL, respectively for Control, Vit1, and Vit2). Supplementation of vitamin B complex to beef calves post-weaning does not seem to affect calf performance, regardless of the level of supplementation.
363 在 42 天预调程序中补充复合维生素 B 对肉牛性能的影响
本研究旨在评估补充复合维生素 B 对牛犊断奶后表现的影响。研究于 2023 年秋季在东俄勒冈农业研究中心(EOARC;俄勒冈州伯恩斯)进行。断奶时(第 0 天),63 头小牛 [Angus × Hereford;体重 (BW) = 252 ± 3.6 kg] 被随机分配到 3 个处理中的 1 个:1)对照组,2)VitB1 或 3)VitB2。分配到对照组的犊牛作为阴性对照,不补充复合维生素 B。在 42 天的预处理期间,分配给 VitB1 处理的犊牛每天每头牛补充 1 克复合维生素 B,而分配给 VitB2 处理的犊牛每天每头牛补充 2 克复合维生素 B。断奶处理后,犊牛被分配到 21 个栏(3 头/栏),每个栏分配处理(7 个栏/处理)。从第 1 天开始至预调阶段结束(第 42 天),在围栏内给犊牛补充维生素 B 群[Vivalto、泛酸(B5;40,000 毫克/千克)、吡哆醇(B6;20,000 毫克/千克)、叶酸(B9;3,200 毫克/千克)、生物素(B7;3,200,000 微克/千克)、钴胺素(B12;320,000 微克/千克);Selko USA, Indianapolis, IN]。维生素 B 群与 1.3 千克干蒸馏谷物混合,提供给分配到维生素 B 群处理的犊牛。此外,犊牛还可自由采食切碎的苜蓿-禾本科干草混合物和全玉米。每天记录围栏摄入量。第 0 天,收集所有犊牛的体重和血液样本。断奶后第 1、3、7、14、21 和 42 天,再采集血液和体重样本。体重用于计算犊牛的平均日增重 (ADG),血液样本用于检测急性期蛋白(ceruloplasmin 和 haptoglobin)。其他血液样本将分析皮质醇和维生素 B 的浓度。变量分析以笔为实验单位,笔(处理)为随机效应。血液变量以重复测量的形式进行评估,并使用 SAS 的 MIXED 程序(SAS Inst.)显著性设定为 P≤ 0.05。在最终体重(对照组、Vit1 和 Vit2 分别为 283、283 和 284 千克)和日增重(对照组、Vit1 和 Vit2 分别为 0.735、0.795 和 0.747 千克/天)方面没有观察到处理效应(P = 0.98)。同样,对分析的急性期蛋白、脑磷脂蛋白(P = 0.66;对照组、Vit1 和 Vit2 分别为 27、30 和 33 µg/dL)和血红蛋白(P = 0.41;对照组、Vit1 和 Vit2 分别为 0.55、0.62 和 0.59 mg/mL)也未观察到治疗效果。给断奶后的肉用犊牛补充复合维生素 B 似乎不会影响犊牛的生产性能,无论补充水平如何。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of animal science
Journal of animal science 农林科学-奶制品与动物科学
CiteScore
4.80
自引率
12.10%
发文量
1589
审稿时长
3 months
期刊介绍: The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year. Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.
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