Multi-gas analyzer for greenhouse gas and ammonia emissions from agro-ecosystems

农业生态系统对我们国家温室气体（GHG）和氨（NH3）的总排放量有很大贡献。这些排放物对环境有重大影响，必须进行测量，以评估各种耕作和土地使用做法的可持续性。 所要求的设备是一台基于傅里叶变换红外光谱的多气体分析仪，能够连续测量空气中温室气体（二氧化碳、一氧化二氮、甲烷）和NH3的混合比例。 该设备将与四个气室连接，并有可能通过多路复用器扩展到16个气室。 这种坚固耐用的设置将允许对受到对比管理系统影响的土壤的温室气体和NH3排放进行广泛的研究。 更重要的是，它将使实验能够针对温室气体和NH3排放的微生物控制以及减少排放的微生物群落管理的研究差距。这将满足跨学科研究的需要，将生物圈-大气交换、微生物多样性和过程联系起来。 该多气体分析仪将立即为17名学生和博士后研究员的培训和研究活动做出贡献，他们将在排放测量的各个方面进行研究，包括自动室部署和精确的痕量气体浓度测量，这将支持我们减少农业系统温室气体和NH3排放的努力。

Agro-ecosystems contribute significantly to our total national emissions of greenhouse gases (GHG) and ammonia (NH3). These emissions have significant impacts on the environment and measurements are necessary to evaluate the sustainability of various farming and land-use practices. The requested equipment is a multi-gas analyzer based on Fourier Transform Infra-Red spectroscopy with capabilities for continuous measurement of GHG (carbon dioxide, nitrous oxide, methane) and NH3 mixing ratios in air. This equipment will be interfaced with four gas chambers with possibility for expansion to 16 through a multiplexer. This robust and rugged setup will allow for a wide-range of studies on GHG and NH3 emissions from soils subjected to contrasting management systems. More importantly, it will enable experiments to target research gaps on microbial control of GHG and NH3 emissions, and management of microbial communities for reduced emissions. This will address the need for inter-disciplinary research bridging biosphere-atmosphere exchange, and microbial diversity and processes. The multi-gas analyzer will immediately contribute to the training and research activities of 17 students and post-doctoral fellows who all aspects of emission measurements, including automatic chamber deployment and precision trace gas concentration measurements which will support our efforts in mitigating GHG and NH3 emissions from agricultural systems.