Evaluation of soil greenhouse gas fluxes for grain-corn under different drainage water management systems
Description: Watertable management has not only proven to have positive effects crop yields but can also improve water quality by reducing NO3- -N concentrations in the drainage water, and regulating drain outflow volumes. However, a higher water table level may also lead to conditions favorable to de-nitrification and can therefore increase emissions of greenhouse gases. This study will look at soil GHG fluxes emitted from a grain-corn cropping system under two drainage management systems: conventional tile drainage and controlled tile drainage with sub-irrigation. The site selected for this study is a 4.2 ha sandy loam field located in St-Emmanuel, Quebec, Canada. GHG fluxes were obtained through a static chamber method, with measurements taken at 15 minutes intervals over a one hour period, throughout the growing season. Environmental factors such as air temperature, precipitation, soil temperature and soil moisture were recorded at the time of gas sampling. These parameters were statistically analysed along with the GHG fluxes to find correlations between these components. Results of this study will indicate whether drainage management practices have a significant impact on GHG fluxes, relative to other agronomic practices and environmental factors.
Keywords: Soil, Agriculture, Greenhouse gases, Drainage, Irrigation
Technical field: Building Systems Engineering
Conference name: CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, 5-8 July 2015.
Session name: Biosystem Management IV - Climate Change
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering