Methane consumption and carbon dioxide emission in tallgrass prairie: Effects of biomass burning and conversion to agriculture
作者： Cathy M. Tate , Robert G. Striegl
DOI: 10.1029/93GB02560
关键词: Water content 、 Soil science 、 Agronomy 、 Soil chemistry 、 Carbon dioxide 、 Environmental science 、 Atmospheric methane 、 Soil water 、 Rangeland 、 Soil gas 、 Carbon cycle
摘要: Consumption of atmospheric methane and emission carbon dioxide by soils were measured on unburned annually burned tallgrass prairie adjacent wheat sorghum agricultural plots in Kansas. Profiles CH4 CO2 concentration with soil depth also measured. Overall patterns consumption varied temporally, land use. Mean for the 200-day sampling period was −1.02 mg m−2 d−1 (SE=0.13, n=41) prairie, −0.63 (SE=0.09, n=45) −0.85 (SE=0.20, n=36) wheat, −0.45 (SE=0.08, n=40) sorghum. Less than 20 % variance explained temperature and/or moisture content. from but not among 15.7 g (SE=1.8, 14.5 (SE=1.3, 13.9 (SE=2.1, 10.3 More 70% rate moisture. Crop management practices influenced timing net annual emission. Methane concentrations generally decreased increased depth, magnitude flux gas gradient. Fertilization fields had no effect or concentrations.
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