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Modeling the hydrogen economy of the rumen ecosystem to determine feeding management strategies for mitigating methane production from dairy cows

对瘤胃生态系统的氢经济进行建模，以确定减少奶牛甲烷产生的饲养管理策略

基本信息

批准号：
336115-2006
负责人：
France, James
金额：
$ 4.77万
依托单位：
University of Guelph
依托单位国家：
加拿大
项目类别：
Strategic Projects - Group
财政年份：
2007
资助国家：
加拿大
起止时间：
2007-01-01 至 2008-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=365417
关键词：
Modeling hydrogen economy rumen ecosystem

项目摘要

The proposed project will comprise two core elements. First, an initial database of data available in the published literature on methane emissions from dairy cows under North American feeding conditions will be constructed from both individual cow and group observations. These data will be analysed statistically (using meta analysis and non-linear methods to allow pooling of data from different sites employing different measurement techniques) and a mechanistic simulation model of enteric fermentation (based on dynamic differential equations) will be developed. Second, in collaboration with the four experimental teams (Nova Scotia, Lennoxville, Lethbridge and Guelph) working on the Greenhouse Gas Mitigation Program for Canadian Agriculture's "Strategic Feeding Programs for Canadian Dairy Cows to Minimize the Extent of Methane Output" sponsored by Dairy Farmers of Canada, new methane production data derived from the projects will be integrated into the database, the statistical analysis refined, and the simulation model developed further and evaluated as a predictive tool for methane emissions under Canadian conditions. The goals of the project are (i) to model the hydrogen economy of rumen ecosystem in order to develop feeding management strategies for mitigating methane emissions from intensive dairy operations, and (ii) to provide more accurate estimates of emission factors for dairy cows for use in constructing national greenhouse gas inventories.

拟议项目将包括两个核心要素。首先，将根据个体奶牛和群体观察构建关于北美饲养条件下奶牛甲烷排放的已发表文献中可用数据的初始数据库。这些数据将进行统计分析（使用荟萃分析和非线性方法，以允许使用不同测量技术汇集来自不同地点的数据），并将开发肠道发酵的机械模拟模型（基于动态微分方程）。其次，与四个实验小组（新斯科舍省、伦诺克斯维尔、莱斯布里奇和圭尔夫）合作，开展由加拿大奶农协会赞助的加拿大农业温室气体减排计划“加拿大奶牛最小化甲烷排放程度的战略饲养计划”，从项目中获得的新甲烷生产数据将被整合到数据库中，完善统计分析，并该模拟模型得到了进一步发展，并作为加拿大条件下甲烷排放的预测工具进行了评估。该项目的目标是（i）对瘤胃生态系统的氢经济进行建模，以制定饲养管理策略，以减少集约化乳制品经营中的甲烷排放，以及（ii）提供更准确的奶牛排放因子估计，用于构建国家温室气体清单。