2026-09-21T07:43:28Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/34483 2023-07-11 col_2142_5131 col_2142_14737 com_2142_5130 com_2142_690 com_2142_397

cool-season urea Branham, Bruce E. Branham, Bruce E. Briskin, Donald P. Mulvaney, Richard L. Voigt, Thomas B. Henning, Shelby 2012-09-18T21:19:18Z 2012-09-18T21:19:18Z 2014-09-18T10:01:01Z 2012-08 2012-09-18T21:19:18Z 2012-08 The objective of my work was to determine factors that affect uptake of N by cool-season turfgrasses. Experiments were conducted to determine the quantity of foliar-applied N that is absorbed by turfgrass leaves, ways to optimize the process, and whether other common management practices can affect foliar N uptake under field conditions. Studies were also carried out to determine if foliar-applied N results in greater N use efficiency than traditional soil-applied methods, as well to determine whether foliar-applied ammoniacal N sources lead to enhanced turf performance under energy stress. A further objective was to assess whether stabilized N fertilizers offered a benefit over unamended sources under field conditions. Experiments to address these objectives were carried out at the Landscape Horticulture Research Center in Urbana, IL. The results indicate that approximately 7-34% of foliar-applied N is absorbed by turfgrass within 4-6 h post application, that this uptake is not affected by common management practices, and that the main driver of foliar N uptake is spray volume, with lower spray volumes enhancing foliar uptake. Furthermore, foliar applications proved far superior to traditional soil-based applications of N fertilizer in terms of N use efficiency. No convincing evidence was obtained that foliar applications of ammoniacal N moderate energy stress when turfgrass is cultivated on a highly fertile native soil. Finally, stabilized N fertilizers were found to offer no benefit over unamended N sources to highly maintained turfgrass cultivated under field conditions. Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2012-07-10T20:40:10Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Henning_Shelby.pdf: 843806 bytes, checksum: 451f2fda54a7ec5b54f1a72c259a4779 (MD5) Made available in DSpace on 2012-09-18T21:19:18Z (GMT). No. of bitstreams: 2 Henning_Shelby.pdf: 1089360 bytes, checksum: e274a745d044fca50006020eb7c6a760 (MD5) license.txt: 4064 bytes, checksum: 5f95926e23ca72694e5438c368f332ae (MD5) Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (srobbins@illinois.edu) on 2012-09-18T21:21:14Z Item is restricted until 2014-09-18T21:21:01Z Restriction data tranferred 2014-07-01T11:35:08-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2014-09-18 16:21:01 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 34757 on 2014-09-18T10:01:01Z. http://hdl.handle.net/2142/34483 en Copyright 2012 Shelby W. Henning Nitrogen-15 (15N) turfgrass Nitrogen fertilization foliar stabilized creeping bentgrass Response of cool-season turfgrass to foliar applied and stabilized nitrogen fertilizers Natural Res & Env Sci 1875 Natural Res & Env Sciences 0190 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Nat Res & Envrn Sci -UIUC 10KS0190PHD