长大的羊羔和山羊羔的比较摄入量,消化能力和肠道甲排放量,这些羊羔和山羊羔养的是中等消化度的草核饮食
M R Quail1, I G Davies1, J M Moorby2
1IBERS, Aberystwyth University, Pwllpeiran Upland Research Centre, Cwmystwyth, Aberystwyth SY23 4AB, UK.
Animal : an international journal of animal bioscience
|April 30, 2025
概括
羊的体重增加较高,料转化也比同样饮食的山羊更好. 羊和山羊的甲排放量每代谢体重相似,这表明每个生产单位的环境影响相似.
科学领域:
- 农业科学 农业科学
- 动物科学动物科学
- 环境科学 环境科学
背景情况:
- 基线排放数据对于制定畜牧减排战略至关重要.
- 小动物 (绵羊和山羊) 的比较甲 (CH4) 排放需要进一步调查,考虑到食消化能力和生长潜力.
研究的目的:
- 为了比较断奶羊羔和山羊羔的生长性能,肠道甲排放,以及体内食消化能力.
- 为了生成关于羊和山羊的CH4排放的基线数据,这些羊和山羊食用了共同的饮食.
主要方法:
- 十只羊羔和十只山羊羔被安置在单独的圈子里,并在8周内随心所欲地食草核饮食.
- 监测干物质摄入量 (DMI) 和活体体重,并使用甲收集室记录肠道CH4排放量.
- 在体内计算了食消化率和料转化率 (FCR).
主要成果:
- 与山羊相比,羊的活体体重增加 (163g/天) 和DMI (1299.8g/天) 显著更高 (分别为84g/天和881.8g/天).
- 绵羊的FCR (6.6g DMI/g增益) 比山羊的FCR (1.5g DMI/g增益) 更好.
- 羊的每日CH4排放量 (26.3g/天) 比山羊 (19.4g/天) 高,但每代谢活量 (W0.75) 和每公斤DMI的CH4排放量在物种之间是相似的.
结论:
- 羊在体重增加和料转化方面比山羊更有效,当它们被食相同的饮食时.
- 尽管每天的CH4排放量更高,但羊和山羊在代谢活量基础上显示出类似的肠道CH4排放量,这表明每个生产单位的环境影响相当.
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