来自种植覆盖作物和豆科牧草牧场的肉牛放牧系统的肠道甲烷排放。

Enteric Methane Emission from Cattle Grazing Systems with Cover Crops and Legume-Grass Pasture.

作者信息

Gere José Ignacio, Restovich Silvina Beatriz, Mattera Juan, Cattoni María Isabel, Ortiz-Chura Abimael, Posse Gabriela, Cerón-Cucchi María Esperanza

机构信息

Unidad de Investigación y Desarrollo de las Ingenierías, Facultad Regional Buenos Aires, Universidad Tecnológica Nacional, Ciudad Autónoma Buenos Aires C1179AAQ, Argentina.

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma Buenos Aires C1033AAJ, Argentina.

出版信息

Animals (Basel). 2024 Dec 7;14(23):3535. doi: 10.3390/ani14233535.

DOI:10.3390/ani14233535

PMID:39682500

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11640361/

Abstract

This study aims to quantify enteric methane (CH) emission and dry matter intake (DMI) in beef steers under two rotational grazing systems: (i) a mixture of cover crops (vetch + ryegrass + forage radish) (CC) and (ii) alfalfa and fescue pasture (AFP). Eighteen Hereford steers were divided into two groups (nine steers per group), assigned to either the CC or AFP. Methane emissions were measured using the SF tracer technique. The results showed that steers grazing CC produced 29% less CH in g/d compared to those on the AFP (119.1 vs. 167.1 g/d for CC and AFP, < 0.05) and 36% less CH yield (4.3 vs. 6.7% of gross energy intake). However, average daily gain (ADG), DMI, and CH intensity (gCH/kg ADG) did not significantly differ between treatments. The integration of CC in a cattle grazing system has the potential to reduce CH emissions by improving forage quality.

摘要

本研究旨在量化两种轮牧系统下肉牛的肠道甲烷（CH）排放量和干物质摄入量（DMI）：（i）覆盖作物混合物（巢菜+黑麦草+饲用萝卜）（CC）和（ii）苜蓿和羊茅牧场（AFP）。18头赫里福德肉牛被分为两组（每组9头），分别分配到CC或AFP组。使用SF示踪技术测量甲烷排放量。结果表明，与AFP组相比，放牧CC的肉牛每日CH排放量减少29%（CC组和AFP组分别为119.1克/天和167.1克/天，<0.05），CH产量减少36%（占总能量摄入量的4.3%对6.7%）。然而，各处理之间的平均日增重（ADG）、DMI和CH强度（克CH/千克ADG）没有显著差异。在牛放牧系统中整合CC有潜力通过改善饲料质量来减少CH排放。