caa a22 4500 463209346 CHVBK 20180405153135.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10705-007-9103-9 doi (NATIONALLICENCE)springer-10.1007/s10705-007-9103-9 Minimizing nitrogen losses from a corn-soybean-winter wheat rotation with best management practices [Elektronische Daten] [Susantha Jayasundara, Claudia Wagner-Riddle, Gary Parkin, Peter von Bertoldi, Jon Warland, Bev Kay, Paul Voroney] Best management practices are recommended for improving fertilizer and soil N uptake efficiency and reducing N losses to the environment. Few year-round studies quantifying the combined effect of several management practices on environmental N losses have been carried out. This study was designed to assess crop productivity, N uptake from fertilizer and soil sources, and N losses, and to relate these variables to the fate of fertilizer 15N in a corn (Zea mays L.)-soybean (Glycine max L.)-winter wheat (Triticum aestivum L.) rotation managed under Best Management (BM) compared with conventional practices (CONV). The study was conducted from May 2000 to October 2004 at Elora, Ontario, Canada. Cumulative NO3 leaching loss was reduced by 51% from 133kg Nha−1 in CONV to 68kgNha−1 in BM. About 70% of leaching loss occurred in corn years with fertilizer N directly contributing 11-16% to leaching in CONV and <4% in BM. High soil derived N leaching loss in CONV, which occurred mostly (about 80%) during November to April was attributable to 45-69% higher residual soil derived mineral N left at harvest, and on-going N mineralization during the over-winter period. Fertilizer N uptake efficiency (FNUE) was higher in BM (61% of applied) than in CONV (35% of applied) over corn and wheat years. Unaccounted gaseous losses of fertilizer N were reduced from 27% of applied in CONV to 8% of applied in BM. Yields were similar between BM and CONV (for corn: 2000 and 2003, wheat: 2002, soybean: 2004) or higher in BM (soybean: 2001). Results indicated that the use of judicious N rates in synchrony with plant N demand combined with other BMP (no-tillage, legume cover crops) improved FNUE by corn and wheat, while reducing both fertilizer and soil N losses without sacrificing yields. Springer Science+Business Media B.V., 2007 Best management practices nationallicence Corn nationallicence Crop rotations nationallicence Nitrate leaching nationallicence Over-winter N losses nationallicence 15N tracer nationallicence Jayasundara Susantha Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Wagner-Riddle Claudia Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Parkin Gary Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut von Bertoldi Peter Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Warland Jon Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Kay Bev Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Voroney Paul Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut Nutrient Cycling in Agroecosystems Springer Netherlands 79/2(2007-10-01), 141-159 1385-1314 79:2<141 2007 79 10705 https://doi.org/10.1007/s10705-007-9103-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-007-9103-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jayasundara Susantha Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- Wagner-Riddle Claudia Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- Parkin Gary Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- von Bertoldi Peter Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- Warland Jon Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- Kay Bev Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 700 1- Voroney Paul Department of Land Resource Science, University of Guelph, N1G 2W1, Guelph, ON, Canada aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Springer Netherlands 79/2(2007-10-01), 141-159 1385-1314 79:2<141 2007 79 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer