日粮中添加 3-硝基氧基丙醇对肉牛生长性能、反刍发酵和肠道甲烷排放的影响的 Meta 分析

José Felipe Orzuna-Orzuna, Juan Eduardo Godina-Rodríguez, Jonathan Raúl Garay-Martínez, Lorenzo Danilo Granados-Rivera, Jorge Alonso Maldonado-Jáquez, Alejandro Lara-Bueno
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引用次数: 0

摘要

本研究旨在采用荟萃分析法评估日粮中添加 3-硝基氧基丙醇(3-NOP)对肉牛生长性能、瘤胃发酵和肠道甲烷排放的影响。最终的荟萃分析数据库包括 15 篇科学文章的结果。响应变量通过随机效应模型进行分析,结果以不添加 3-NOP 和添加 3-NOP 的处理之间的加权平均差 (WMD) 进行报告。日粮中添加 3-NOP 会降低(p < 0.001)干物质摄入量,但不会影响(p > 0.05)平均日增重,同时会提高(p < 0.05)饲料效率。在瘤胃中,补充 3-NOP 会提高(p < 0.01)pH 值和瘤胃中丙酸盐、丁酸盐、戊酸盐、异丁酸盐和异戊酸盐的浓度。相反,日粮中添加 3-NOP 会降低瘤胃中的氨氮浓度、总挥发性脂肪酸、乙酸盐和乙酸盐/丙酸盐比率(p < 0.001)。此外,日甲烷(CH4)排放量、CH4产量和CH4排放量占摄入总能量的百分比也随着 3-NOP 的日粮补充而下降(p < 0.001)。总之,日粮中添加 3-硝基氧基丙醇可作为一种营养策略来提高肉牛的饲料效率和瘤胃发酵,同时减少肠道甲烷排放。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Meta-Analysis of 3-Nitrooxypropanol Dietary Supplementation on Growth Performance, Ruminal Fermentation, and Enteric Methane Emissions of Beef Cattle
This study aimed to evaluate the effects of dietary supplementation with 3-nitrooxypropanol (3-NOP) on growth performance, ruminal fermentation, and enteric methane emissions of beef cattle using a meta-analytic approach. The final meta-analysis database included results from 15 scientific articles. The response variables were analyzed through random effects models, where the results were reported as weighted mean differences (WMD) between the treatments without 3-NOP and those supplemented with 3-NOP. The dietary inclusion of 3-NOP decreased (p < 0.001) dry matter intake but did not affect (p > 0.05) average daily gain and increased (p < 0.05) feed efficiency. In the rumen, 3-NOP supplementation increased (p < 0.01) the pH and ruminal concentration of propionate, butyrate, valerate, isobutyrate, and isovalerate. In contrast, dietary supplementation with 3-NOP decreased (p < 0.001) the rumen concentration of ammonia nitrogen, total volatile fatty acids, acetate, and the acetate/propionate ratio. Furthermore, daily methane (CH4) emission, CH4 yield, and CH4 emission as a percentage of gross energy ingested decreased (p < 0.001) in response to 3-NOP dietary supplementation. In conclusion, dietary supplementation with 3-nitrooxypropanol can be used as a nutritional strategy to improve feed efficiency and ruminal fermentation in beef cattle and, at the same time, reduce enteric methane emissions.
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