Submitted to: International Soil Tillage Research Organization Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/10/2005
Publication Date: 8/13/2005
Citation: Prior, S.A., Torbert III, H.A., Runion, G.B., Rogers Jr, H.H. 2005. Effects of atmospheric co2 enrichment on crop nutrient dynamics under no-till conditions [abstract]. International Soil Tillage Research Organization.
Technical Abstract: Increasing atmospheric CO2 concentration could increase crop productivity and alter plant nutrient dynamics which may impact nutrient management in future CO2-enriched agroecosystems. This study was conducted in 1992, 1993, and 1994 as a split-plot design with two crop species ([Glycine max (L.) Merr.] and grain sorghum [Sorghum bicolor (L.) Moench.]) as the main plots and two CO2 levels (375 and 705 ppm CO2) as subplots using open top field chambers in Auburn, AL. The soil was a Blanton loamy sand (loamy siliceous, thermic, Grossarenic Paleudults) and no-till management was used in all plots. At the end of each growing season, plants were separated into component parts prior to dry weight determination and nutrient analysis. Carbon dioxide-induced changes in nutrient dynamics for these crops will be discussed in terms of nutrient concentration, nutrient content, nutrient utilization efficiency and nutrient uptake efficiency.