肉桂醛在育肥牛饲料中的应用：摄入量、生长性能、胴体特性和血液代谢物。

Cinnamaldehyde in feedlot cattle diets: intake, growth performance, carcass characteristics, and blood metabolites.

机构信息

Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.

出版信息

J Anim Sci. 2010 Mar;88(3):1082-92. doi: 10.2527/jas.2008-1608. Epub 2009 Nov 20.

DOI:10.2527/jas.2008-1608

PMID:19933423

Abstract

Cinnamaldehyde (CIN), a natural chemical compound found in the bark of cinnamon trees, can alter rumen fermentation by inhibiting selected ruminal microbes, and consequently, may improve growth performance and feed efficiency of animals. The objective of this study was to evaluate the effects of supplementing the diet of feedlot cattle with CIN on intake, growth performance, carcass characteristics, and blood metabolites. Seventy yearling steers (BW = 390 +/- 25.2 kg) were assigned to a randomized complete block design with 5 treatments: control (no additive), monensin (MO; 330 mg*steer(-1)d(-1)), and 400, 800, or 1,600 mg of CINsteer(-1)*d(-1). At the start of the experiment, steers were blocked according to BW and assigned to 14 blocks of 5 cattle, with cattle within block assigned to treatments. The diets consisted of 9% barley silage, 86% dry-rolled barley grain, and 5% supplement (DM basis). Dry matter intake responded quadratically (P = 0.03) to CIN supplementation with 13% more feed consumed for steers fed CIN (mean of 3 CIN levels) compared with those fed control during the first 28 d of the experiment, and with a tendency of 4% increase over the entire experiment. The ADG (kg/d) tended to respond quadratically (P = 0.08) to CIN supplementation during the first 28 d, but was not affected over the entire experiment (112 d). Feed efficiency (G:F) linearly declined (P = 0.03) during the first 28 d with CIN supplementation and was quadratically affected between d 29 to 56 and d 85 to 112 by CIN dose. Supplementation of MO did not affect (P > 0.15) DMI or growth performance at any time during the experiment. Serum NEFA concentrations were reduced (P = 0.05) by 35, 29, 30, and 22%, respectively, on d 56, 84, 112, and overall with CIN supplementation. Concentrations of serum amyloid A were reduced on d 28 by 56, 60, or 56% for 800 mg of CIN, 1,600 mg of CIN, and MO, respectively, compared with control. Plasma concentrations of lipopolysaccharide binding protein were linearly decreased (P = 0.05) with increasing CIN supplementation on d 28. Results indicate that supplementing a feedlot finishing diet with a small dose of CIN ameliorated feed intake during the initial month but had minimal effects on ADG, feed efficiency, and carcass traits over the entire experiment. Including CIN in the diet of feedlot cattle, particularly early in the feeding period, may help promote intake and reduce the effects of stress.

摘要

肉桂醛（CIN）是肉桂树皮中含有的一种天然化合物，通过抑制选定的瘤胃微生物，可改变瘤胃发酵，从而可能改善动物的生长性能和饲料效率。本研究的目的是评估在育肥牛日粮中添加 CIN 对采食量、生长性能、胴体特性和血液代谢物的影响。70 头青年公牛（BW=390+/-25.2kg）被分配到随机完全区组设计，有 5 种处理：对照（无添加剂）、莫能菌素（MO；330mg*牛（-1）天（-1））和 400、800 或 1600mg牛（-1）*天（-1）的 CIN。在实验开始时，根据 BW 将公牛分组，并将其分配到 14 个 5 头公牛的区块中，每个区块内的公牛分配到处理组。日粮由 9%大麦青贮料、86%干压大麦谷物和 5%补充料（DM 基础）组成。干物质采食量对 CIN 补充呈二次曲线（P=0.03），与对照组相比，试验前 28 天，饲喂 CIN（3 种 CIN 水平的平均值）的牛采食量增加了 13%，整个试验期间有 4%的增长趋势。ADG（kg/d）在试验前 28 天对 CIN 补充呈二次曲线（P=0.08），但整个试验期间没有影响（112d）。在试验前 28 天，随着 CIN 补充，饲料效率（G：F）呈线性下降（P=0.03），在第 29 天至 56 天和第 85 天至 112 天之间，CIN 剂量呈二次影响。在试验的任何时间，莫能菌素（MO）的补充都没有影响（P＞0.15）DMI 或生长性能。血清 NEFA 浓度在第 56、84、112 和整个试验期间分别降低了 35%、29%、30%和 22%，与 CIN 补充有关。血清淀粉样蛋白 A 的浓度在第 28 天分别降低了 56%、60%或 56%，与对照组相比，800mg 的 CIN、1600mg 的 CIN 和 MO 分别降低了 56%、60%或 56%。第 28 天，随着 CIN 补充量的增加，血浆脂多糖结合蛋白的浓度呈线性下降（P=0.05）。结果表明，在育肥牛的日粮中添加小剂量的 CIN 可改善最初一个月的采食量，但对整个试验期间的 ADG、饲料效率和胴体特性几乎没有影响。在育肥牛的日粮中添加 CIN，特别是在饲养初期，可能有助于促进采食量并减轻应激的影响。