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使用GreenFeed监测系统测量影响肠道甲产生的动物因素,用于放牧奶牛的乳牛

K Starsmore¹, N Lopez-Villalobos², L Shalloo³

¹Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy Co. Cork, Ireland P31 P302; Massey University, Palmerston North, Manawatu, New Zealand 4442.

Journal of dairy science

|November 17, 2023

概括

减少奶牛的温室气体 (GHG) 排放至关重要. 这项研究发现,能量校正的牛奶产量,代谢活量和牛奶尿素度增加了肠道甲产量,而身体状况评分则降低了甲产量.

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:

基于牧场的乳制品系统面临着减少温室气体 (GHG) 排放的压力,其中肠道甲 (CH4) 是爱尔兰和新西兰等国家的重要贡献者.
国家气候目标要求减少农业温室气体排放量,特别是甲,这促使需要了解影响放牧奶牛生产的因素.

研究的目的:

为了研究肠道甲 (CH4) 生产与牧场乳制品系统中的关键动物特征之间的关系.
确定可以管理的因素,以减轻牧场奶牛的CH4排放.

主要方法:

用GreenFeed监测设备在10周内测量了45只晚期哺乳奶牛的肠道CH4排放量.
收集了干物质摄入量,能量校正的牛奶产量,牛奶尿素度,代谢活量和身体状况评分 (BCS) 的数据.
使用多重线性回归模型分析了CH4产量与测量的动物特征之间的关系.

主要成果:

肠道CH4产量平均为352g/天,重复率为0.66,表明适合表型化.
增加能量校正的牛奶产量,新陈代谢活量和牛奶尿素度与更高的CH4产量正相关.
较高的身体状况评分 (BCS) 与降低的CH4产量有关.

结论:

牛奶产量,活体重,牛奶尿素和BCS等动物特征会影响牧场奶牛的肠道CH4产量.
虽然这些因素解释了CH4变化的47%,但需要进一步的研究来解释剩余的变化.
肠道CH4的产生是一种可重复的特征,使其成为基因选择和减少排放的管理策略的可行目标.

关键词:

肠道甲的使用.放牧的奶牛是放牧的奶牛.温室气体排放量排放量温室气体排放量排放量甲强度是甲的强度.甲的收益率是多少

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