Abstract Limited information is available in the literature on greenhouse gas (GHG) quantification from livestock production systems in Africa. Therefore, this project was carried out to generate baseline emission factors of methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2) from broiler and layer barns with building design typical of Cameroon. Emissions were measured from two broiler barns during the entire production cycles and a layer barn for a limited period using flux chambers. Methane emission factors from the broiler barns with mud and cement floors were 0.96 ± 1.04 and 0.36 ± 0.17 mg bird−1 hr−1 respectively, and 0.76 ± 0.56 mg bird−1 hr−1 from the layer barn with cement floor. Nitrous oxide emission from the broiler barns with mud and cement floors were 12.94 ± 10.11 and 1.68 ± 1.02 mg bird−1 hr−1 respectively, and 0.21 ± 0.28 mg bird−1 hr−1 from the layer barn. Carbon dioxide emission factors from the broiler barns with mud and cement floors were 9327 ± 3508 and 25526 ± 6904 mg bird−1 hr−1 respectively, and 8942 ± 36756 mg bird−1 hr−1 from the layer barn. When scaled per livestock unit (LU), where 1 LU is 500 kg bird weight, CH4 emissions were 0.16 ± 0.17 and 0.06 ± 0.03 g LU−1 hr−1 from the broiler barns, and 0.19 ± 0.14 g LU−1 hr−1 from the layer barn. Nitrous oxide emissions were 2.16 ± 1.69 and 0.28 ± 0.17 g LU−1 hr−1 from the broiler barns, and 0.05 ± 0.07 g LU−1 hr−1 from the layer barn. Broilers reared in management systems with wood shavings on mud floor had relatively high CH4 and N2O emissions compared to broilers on wood shavings and cement floor, with the contrary observed for CO2. The emissions N2O were significantly higher from broiler barns compared to layer barns. Emissions were higher in the mornings compared to later periods of the day. Given the observed results, GHG emission mitigation strategies need to be customised for each building design and management system.

中文翻译：

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喀麦隆蛋鸡和肉鸡舍温室气体排放因子

摘要 关于非洲畜牧生产系统温室气体 (GHG) 量化的文献资料有限。因此，本项目的实施是为了从采用喀麦隆典型建筑设计的肉鸡和蛋鸡舍生成甲烷 (CH4)、一氧化二氮 (N2O) 和二氧化碳 (CO2) 的基线排放因子。排放量是在整个生产周期期间从两个肉鸡舍和一个蛋鸡舍在有限时间内使用通量室测量的。来自带有泥地和水泥地板的肉鸡舍的甲烷排放因子分别为 0.96 ± 1.04 和 0.36 ± 0.17 mg 鸟-1 hr-1，来自带有水泥地板的蛋鸡舍的甲烷排放因子为 0.76 ± 0.56 mg 鸟-1 hr-1。带有泥地和水泥地板的肉鸡舍的一氧化二氮排放量分别为 12.94 ± 10.11 和 1.68 ± 1.02 mg 鸟−1 hr−1 和 0.21 ± 0。28 mg 鸟−1 hr−1 来自蛋鸡舍。来自带有泥地和水泥地板的肉鸡舍的二氧化碳排放因子分别为 9327 ± 3508 和 25526 ± 6904 mg 鸟-1 hr-1，来自蛋鸡舍的 8942 ± 36756 mg 鸟-1 hr-1。当按牲畜单位 (LU) 进行缩放时，其中 1 LU 是 500 公斤家禽重量，来自肉鸡舍的 CH4 排放分别为 0.16 ± 0.17 和 0.06 ± 0.03 g LU−1 hr−1，以及 0.19 ± 0.14 g LU−1 hr− 1 从层谷仓。来自肉鸡舍的一氧化二氮排放为 2.16 ± 1.69 和 0.28 ± 0.17 g LU-1 hr-1，来自蛋鸡舍的 0.05 ± 0.07 g LU-1 hr-1。与木屑和水泥地板上的肉鸡相比，在泥地板上使用木屑的管理系统中饲养的肉鸡的 CH4 和 N2O 排放量相对较高，而 CO2 则相反。与蛋鸡舍相比，肉鸡舍的 N2O 排放量明显更高。与当天晚些时候的排放量相比，早晨的排放量更高。鉴于观察到的结果，需要为每个建筑设计和管理系统定制温室气体减排策略。