草的营养价值对岛屿牧场系统中肠道甲排放的季节性影响
Helder P B Nunes1, Cristiana S A M Maduro Dias1, Carlos M Vouzela1
1Institute of Agricultural and Environmental Research and Technology, Faculty of Agricultural and Environmental Sciences, University of the Azores, Rua Capitão João d'Ávila, 9700-042 Angra do Heroísmo, Açores, Portugal.
Animals : an open access journal from MDPI
|September 9, 2023
概括
季节性牧场的质量显著影响了阿佐尔群岛的肠道甲排放. 秋季牧场管理导致甲产量降低,尽管牛的夏季峰值,特别是孕妇奶牛.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 动物科学动物科学
背景情况:
- 来自放牧牛的肠道甲 (CH4) 的量化对于全球气候变化减缓至关重要.
- 由于季节性而导致的牧场质量变化在准确估计甲排放方面存在重大挑战.
- 亚速尔群岛地区全年放牧,需要特定区域的数据来精确量化肠道甲.
研究的目的:
- 评估季节性因素对阿佐尔群岛肠道甲排放的影响.
- 通过IPCC最新的方法来完善甲排放估计.
- 确定该地区甲产量最高的牛类.
主要方法:
- 收集每年的料,缩物和牧场样本,用于营养和消化性分析.
- 应用了IPCC 2006年2级方法,更新于2019年,用于甲产量估计.
- 分析了牧场化学成分的季节性变化及其对排放的影响.
主要成果:
- 在冬季和夏季之间观察到牧场化学成分的显著差异,秋季牧场显示出最佳的营养质量.
- 亚速尔群岛估计的肠道甲排放总量为20341CH4,在夏季达到5837CH4.
- 当考虑整个牛群时,怀孕的奶牛被确定为最高的甲排放者,尽管繁殖公牛,肉牛和小母牛的每只动物排放量更高.
结论:
- 牧场质量的季节性变化直接影响阿佐尔群岛的肠道甲排放.
- 优化牧场管理,特别是在秋季,可以减轻甲释放.
- 准确的量化需要考虑动物类别和季节性料供应,以制定有效的气候战略.
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