半精制甘油作为替代能源对泌乳奶牛采食量、消化率和产奶量的影响。

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Murilo de Almeida Meneses, Robério Rodrigues Silva, Dicastro Dias de Souza, Eli Santana de Oliveira Rodrigues, Wendel Bispo Santos E Santos, Lara Maria Santos Brant, José Esler Freitas Júnior, Fabiano Ferreira da Silva
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引用次数: 0

摘要

目的:研究饲粮甘油水平对禁闭泌乳奶牛采食量、营养物质消化率、产奶量和乳成分、氮平衡、微生物产量和摄食行为的影响。方法:选用8头杂交奶牛(荷斯坦×泽布),平均泌乳期90±10 d,产奶量21.3±0.47 kg/d,体重570±51 kg。将奶牛分为两个4×4拉丁方格,分别进行以下处理:对照组(G0),不含甘油;G6,日粮总干物质(DM)中6%甘油的添加量;G12, 12%甘油包合物;G18, 18%甘油包合物。结论:饲喂区奶牛饲粮中添加甘油虽然提高了营养物质的消化率,但显著降低了干物质采食量,从而降低了总能量摄入量,进而影响了产奶量。因此,尽管由于其可获得性和能量价值,它是一种很有前途的副产品,但在测试比例中,半精制甘油作为乳牛日粮的能量替代品是不可用的,需要谨慎行事,以免影响生产性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Semirefined glycerin as an alternative energy source on intake, digestibility and milk production of lactating cows.

Objective: This study aimed to evaluate the effect of dietary glycerin levels on feed intake, nutrient digestibility, milk yield and composition, nitrogen balance, microbial production, and eating behavior in confined lactating cows.

Methods: Eight crossbred cows (Holstein × Zebu) were used, with an average of 90 ± 10 days in milk, milk production of 21.3 ± 0.47 kg/day, and body weight of 570 ± 51 kg. The cows were assigned to two 4×4 Latin squares with the following treatments: Control (G0), no glycerin inclusion; G6, 6% glycerin inclusion in the total dietary dry matter (DM); G12, 12% glycerin inclusion; and G18, 18% glycerin inclusion.

Results: Glycerin inclusion linearly decreased DM intake (p<0.001), crude protein (CP) intake (p=0.004), and neutral detergent fiber (NDF) intake (p<0.001). On the other hand, the digestibility coefficients of DM (p=0.001), CP (p=0.007), non-fiber carbohydrates (NFC) (p<0.001), and total digestible nutrients (TDN) (p=0.013) increased linearly. Milk yield (P=0.046) and 3.5% fat-corrected milk (FCM) (p=0.013) decreased linearly.

Conclusion: Despite increasing the digestibility of nutrients, the inclusion of glycerin in diets for feedlot dairy cows resulted in a significant reduction in dry matter intake, which compromised total energy intake and, consequently, milk production. Thus, although it is a promising co-product due to its availability and energy value, semi-refined glycerin, in the proportions tested, was not viable as an energy substitute in diets of lactating cows, requiring caution not to compromise productive performance.

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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
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223
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3 months
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