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首页> 外文期刊>Livestock Science >Greenhouse gas emissions from pastoral based dairying systems: the effect of uncertainty and management change under two contrasting production systems.
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Greenhouse gas emissions from pastoral based dairying systems: the effect of uncertainty and management change under two contrasting production systems.

机译：基于牧场的奶牛场系统产生的温室气体排放：在两种截然不同的生产系统下，不确定性和管理变化的影响。

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On-farm and off-farm greenhouse gas emissions (GHG) were compared under 2 contrasting pastoral based milk production systems. The previously developed Pastoral Milk Emission Model was used. GHG analysed were CH4, N2O and CO2. The main aim of the study was to identify the impact of simple management changes on emissions and farm profitability, to allow the development of simple mitigation strategies. A further aim was to determine the effects of the production system on uncertainties surrounding the emission of GHG. The 2 production systems analysed were: the standard procedures recommended for Kilmaley (County Clare) and Moorepark (County Cork), both in the Republic of Ireland, with grazing seasons of 149 and 250 days, respectively. Management scenarios tested included changes in pasture quality, pasture utilization, N application rates, silage quality, level of concentrate supplementation and calving date. GHG emissions were greater at Kilmaley than at Moorepark. Simple changes in farming systems led to small alterations in both on-farm and total GHG emissions at both locations, whereas the impact of silage quality was site-specific. Tailor-made whole farm mitigation strategies, developed by combining all identified management changes, both reduced GHG emissions and increased farm profitability. Projection of the resulting data onto the entire dairy herd of the Irish Republic suggested that significant reductions in emissions would be possible.
机译：在两种基于牧场的牛奶生产系统对比下，比较了农场内和农场外温室气体排放量（GHG）。使用先前开发的田园奶排放模型。分析的温室气体为CH4，N2O和CO2。该研究的主要目的是确定简单的管理变更对排放和农场盈利能力的影响，以便制定简单的缓解策略。另一个目标是确定生产系统对温室气体排放不确定性的影响。分析的两种生产系统是：爱尔兰共和国的Kilmaley（克莱尔郡）和Moorepark（科克郡）推荐的标准程序，放牧季节分别为149天和250天。测试的管理方案包括牧场质量，牧场利用率，氮肥施用量，青贮饲料质量，精矿补充水平和产犊日期的变化。吉尔马利的温室气体排放量大于摩尔公园的温室气体排放量。耕作制度的简单变化导致两个地点的农场和总温室气体排放量都发生了很小的变化，而青贮饲料质量的影响则因地而异。通过结合所有已确定的管理变更而制定的量身定制的整体农场缓解策略，既减少了温室气体排放，又提高了农场的盈利能力。将结果数据投影到爱尔兰共和国的整个奶牛场，表明可能会大大减少排放。

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