Emission factors estimated from enteric methane of dairy cattle in Andean zone using the IPCC Tier-2 methodology
Emission factors estimated from enteric methane of dairy cattle in Andean zone using the IPCC Tier-2 methodology
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DOI：
10.1007/s10457-017-0177-3
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发表时间：
2019-06-01
影响因子：
2.2
通讯作者：
Mora-Delgado, Jairo
中科院分区：
文献类型：
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作者：
Silva Parra, Amanda;Mora-Delgado, Jairo
反刍家畜的肠道 CH4 排放代表了膳食能量的损失，并导致温室气体排放，实际上，这取决于饲养水平和膳食成分。我们根据 IPCC Tier 2 方法计算了哥伦比亚安第斯地区荷斯坦牛肠道发酵的甲烷排放因子。这项研究涉及动物性能、提高牲畜生产力的管理实践、来自狼尾草/白三叶草协会的林牧系统的牧场和草料的消化率更高，围场上有金合欢围栏。为此，应用一些模型参数和二级模型方程：体重、成熟体重、日增重、失重、产奶量、乳脂含量、妊娠率和饲料质量来计算总能量GE。所有这些变化都用于研究对预测的 CH4 排放的影响，以每头奶牛（-1）年（-1）CH4 排放因子（MEF）的变化（以公斤 CH4 为单位）。 CH4换算系数(MCF)占饲料总能量摄入量的百分比，导致SPS的CH4头(-1)年(-1)排放系数为52kg CH4头(-1)年(-1)，比黑麦草改良牧场和马铃薯轮作的退化狼尾草草场分别低28%和45%，导致排放系数分别为72和93kg CH4头(-1)年(-1)。将这些排放因子与 IPCC 国家清单中的 Tier-1 和 Tier-2 方法使用值 Ym default 的排放因子进行比较。通过这项研究，这些排放因子可应用于具有这些特征的哥伦比亚安第斯地区的区域和国家清单。
Enteric CH4 emissions from ruminant livestock represent a loss of dietary energy and contribute to greenhouse gas emissions, actually, that is depending on feeding level and diet composition. We calculated emission factors of methane depending to enteric fermentation of Holstein cattle in Andean zone of Colombia, based on methodology IPCC Tier 2. This study involved animal performance, management practices for improved livestock productivity, higher digestibility of pasture and forage from silvopastoral system of the association Pennisetum clandestinum/Trifolium repens on paddocks bounded by live fences of Acacia decurrens. For that, some model parameters and Tier-2 model equations were applied: body weight, mature weight, daily gain, weight loss, milk production, milk fat content, pregnancy rates and quality of feed to calculate gross energy GE. All these variations were used to investigate the effects on predicted CH4, emission in terms of the changes in the CH4 emission factor (MEF) in kg of CH4 per head dairy cattle(-1)year(-1). CH4 conversion factor (MCF) as a percentage of gross energy intake with feed, resulting in emission factor of 52kg CH4 head(-1) year(-1) in SPS, 28 and 45% lower than in improved pasture of Lolium multiflorum and degraded pasture of Pennisetum clandestinum in rotation with potatoes, resulting in emission factors of 72 and 93kg CH4 head(-1)year(-1) respectively. These emission factors were compared with the emission factors of Tier-1 and Tier-2 methodology used value Ym default of IPCC from national inventories. Through this research these emission factors can be applied for regional and national inventories in Andean areas of Colombia with these features.