81-5 Greenhouse Gas Emissions From Cotton and Grain Sorghum Cropping Systems Under Different Nitrogen and Tillage Treatments.

Poster Number 320

See more from this Division: ASA Section: Environmental Quality
See more from this Session: Carbon Sequestration and GHG Emissions From Agricultural & Grassland Systems: Part II.
Monday, October 22, 2012
Duke Energy Convention Center, Exhibit Hall AB, Level 1
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Mimi Roy1, Nithya Rajan2, Kenneth Casey3, Francisco M. Padilla4 and Parmodh Sharma1, (1)Texas Agrilife Research, Teaxs A&M University, Vernon, TX
(2)Texas A&M AgriLife Research, Vernon, TX
(3)Texas AgriLife Research, Texas A&M University, Amarillo, TX
(4)Texas Tech University, Lubbock, TX
Globally agriculture accounts for more than 10% of anthropogenic greenhouse gas (GHG) emissions. According to the United Nations’ Intergovernmental Panel on Climate Change (IPCC), agricultural activities are responsible for 21-25% of all anthropogenic CO2 fluxes, 50% of total CH4 emissions, and 60% of total N2O fluxes. Different cropping and tillage management practices have the potential to alter atmospheric CO2, N2O, and CH4 concentrations. The atmospheric emission of N2O is related to N fertilizer use in cropping systems. This study was conducted in the Texas Rolling Plains and aims to compare the greenhouse gas fluxes from cotton and grain sorghum under different management practices. The GHG emission trends in response to fertilizer N application will also be reported. Small flux chambers were used to measure GHG fluxes from soil at fixed time intervals. The concentrations of GHG were determined by gas chromatography.
See more from this Division: ASA Section: Environmental Quality
See more from this Session: Carbon Sequestration and GHG Emissions From Agricultural & Grassland Systems: Part II.