2026-09-23T04:28:41Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/45373 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Kumar, Praveen Woo, Dong Kook 2013-08-22T16:38:13Z 2013-08-22T16:38:13Z 2013-08 2013-08-22T16:38:13Z 2013-08 Due to the increase in the demands for bioenergy, considerable areas in the Midwestern United States (US) could be converted into croplands for second generation bioenergy, such as the cultivation of miscanthus and switchgrass. Study on the effect of the expansion of these crops on soil carbon and nitrogen dynamics is integral to understanding their long-term environmental impacts. We developed a coupled hydrological-soil nutrient model under identical field conditions and different harvest litter input scenarios. Our project simulation shows that there are critical harvest litter amounts for miscanthus (15% of above-ground biomass when harvested), and switchgrass (25%) to sequester significant quantities of atmospheric carbon dioxide (CO2) into the soil (up to 9.7 and 7.5 kg C m-2 accumulations in miscanthus and switchgrass, respectively, within the next 100 years), while reducing nitrogen (N) losses (approximately 98 % reduction in soil inorganic nitrogen), unlike corn-corn-soybean rotation. This finding resulted from an increase in the carbon/nitrogen (C:N) ratio of topsoil, deactivating soil microbes. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-07-18T13:01:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 5 Woo_Dongkook.docx: 8858188 bytes, checksum: 0a309ed0069cf3f63fe99348d82dec44 (MD5) Woo_Dongkook.pdf: 9762951 bytes, checksum: b1d640c193350c5d6b01d194ac19deb4 (MD5) Woo_Dongkook.pdf: 9762951 bytes, checksum: b1d640c193350c5d6b01d194ac19deb4 (MD5) Woo_Dongkook.pdf: 9782891 bytes, checksum: f177b2e81ef020118442c687a9b016e8 (MD5) Woo_Dongkook.pdf: 14038583 bytes, checksum: b4a83ba026ba6e188b350b07880461f1 (MD5) Made available in DSpace on 2013-08-22T16:38:13Z (GMT). No. of bitstreams: 4 Dong Kook_Woo.pdf: 14039122 bytes, checksum: 347b2ccbb79dad0a18e16a3655200b7c (MD5) Woo_Dongkook.docx: 8842482 bytes, checksum: 8f293033e933804f98a919a621e2517c (MD5) 1_Woo_Dongkook.docx: 8858188 bytes, checksum: 0a309ed0069cf3f63fe99348d82dec44 (MD5) license.txt: 4060 bytes, checksum: 30a489fce2ff3fe45b1308613617ad2d (MD5) http://hdl.handle.net/2142/45373 en Copyright 2013 Dong Kook Woo soil carbon soil nitrogen miscanthus switchgrass bioenergy crop Soil carbon and nitrogen cycle modeling for bioenergy crops text Civil & Environmental Eng 1251 Civil Engineering 0106 University of Illinois at Urbana-Champaign Thesis M.S. MS:Civil Engineering -UIUC 10KS0106MS