日粮中添加鸟苷酸对生长母牛生长性能和血液化学成分的影响

IF 4.8 Q1 AGRICULTURE, MULTIDISCIPLINARY Journal of Agriculture and Food Research Pub Date : 2024-07-29 DOI:10.1016/j.jafr.2024.101327
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引用次数: 0

摘要

胍基乙酸(GAA,Cas编号:352-97-6)是一种饲料添加剂,可对动物的能量和蛋白质代谢产生积极影响,因此具有在不影响动物健康的情况下提高动物生产性能的潜力。本研究的目的是评估日粮中添加 GAA 对生长期阉牛 60 天的生长性能和血液生化指标的影响。40 头生长期杂交雄性阉牛(Bos taurus × Bos indicus; 146.0 ± 0.5 kg 体重 (BW))被随机分为两个实验组(n = 20):第一组为不添加 GAA 的全混合日粮 (TMR);第二组为添加 0.1 % GAA 的全混合日粮。与饲喂不含 GAA 的 TMR 的阉牛相比,饲喂 GAA 的阉牛干物质摄入量(DMI)减少了 12.8%(P < 0.0001)。虽然这些变化对体重和平均日增重(ADG)没有影响(P = 0.4180),但通过将每公斤 ADG 的 DMI 降低 10.4%,提高了饲料转化效率(FCE)(P < 0.0490)。此外,TMR 中添加 GAA 可使甘油三酯降低 (P < 0.0050) 23.2%,并使阉牛的尿素氮 (BUN) 提高 22.4% (P < 0.0002)。然而,采样时间影响(P ≤ 0.0042)除钙以外的所有血液化学参数,而补充 GAA 与时间之间的交互作用对任何参数都没有显著影响(P ≥ 0.0750)。总之,日粮中添加 1 g GAA kg-1 的 TMR 可降低 DMI 并提高 FCE,但不会对血液生化指标产生负面影响。
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Influence of dietary supplementation of guanidinoacetic acid on growth performance and blood chemistry profile of growing steers

Guanidinoacetic acid (GAA, Cas no. 352-97-6) is a feed additive that positively influences the energy and protein metabolism of animals, so it has the potential to improve the productivity of animals without affecting their health. The objective of the present study was to evaluate the influence of dietary supplementation with GAA on growth performance and blood chemistry profile of growing steers for 60 d. Forty growing crossbred male steers (Bos taurus × Bos indicus; 146.0 ± 0.5 kg body weight (BW)) were randomly divided into two experimental groups (n = 20): the first, consisted of a total mixed ration (TMR) without; and the second, substituted the 0.1 % of the TMR with GAA. Dietary supplementation of GAA decreased (P < 0.0001) dry matter intake (DMI) by 12.8 % compared to the steers that were fed the TMR without GAA. Although these changes did not influence (P = 0.4180) BW and average daily gain (ADG), they improved (P < 0.0490) feed conversion efficiency (FCE) by decreasing DMI per kilogram of ADG by 10.4 %. Furthermore, the inclusion of GAA in the TMR reduced (P < 0.0050) triglycerides by 23.2 % and increased the urea nitrogen (BUN) in the steers by 22.4 % (P < 0.0002). However, sampling time influenced (P ≤ 0.0042) all blood chemistry parameters except calcium, and the interaction between GAA supplementation and time did not significantly influence (P ≥ 0.0750) any parameter. In conclusion, dietary supplementation of 1 g GAA kg−1 of TMR, decreased the DMI and improved FCE without negative effects on blood chemistry profiles.

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CiteScore
5.40
自引率
2.60%
发文量
193
审稿时长
69 days
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