Asian Journal of Crop Science1994-78792077-2041Asian Network for Scientific Information10.3923/ajcs.2009.105.112Brassica napus L.) Varieties]]>ZhangZhen-hua SongHai-xing LiuQiang RongXiang-min PengJian-wei XieGui-xian ZhangYu-ping 2200912Field experiment was carried out to evaluate the nitrogen efficiency and nitrogen response under no nitrogen application and nitrogen application conditions. The differences of grain yield, nitrogen absorption amount, nitrogen response and nitrogen use efficiency among 16 winter varieties of oilseed rape (Brassica napus L.) were systematically studied and the contribution of nitrogen absorption efficiency and nitrogen use efficiency to nitrogen efficiency in different oilseed rape varieties were preliminarily discussed. Results showed that, the differences of grain yield, nitrogen use efficiency and nitrogen response among the 16 oilseed rape varieties were significantly, regardless of N application level; but only under no N application conditions, the differences of nitrogen absorption amount among varieties were significantly. The 16 oilseed rape varieties were divided into four different genotypes in accordance with the nitrogen use efficiency and nitrogen response under no nitrogen application condition: (1) Nitrogen High Efficiency-Nitrogen High Response, included Xy1, Xy16, Xy17, Xh19, Xh20 and Xy21. (2) Nitrogen Low Efficiency-Nitrogen Low Response (NLE-NLR), included Xy6, Xy8 and Xy9. (3) Nitrogen High Efficiency-Nitrogen Low Response (NHE-NLR), included Xy7, Xy12, Xy14, Xy15 and Xy24. (4) Nitrogen Low Efficiency-Nitrogen High Response (NLE-NHR), included Xy11 and Xy13. The variation coefficient of nitrogen use efficiency was higher than nitrogen absorption efficiency, regardless of N application level; it was also showed that the contribution of nitrogen use efficiency to nitrogen efficiency was higher than nitrogen absorption efficiency. However, variation coefficient of nitrogen absorption efficiency under nitrogen application condition was higher than under no N application condition; variation coefficient of nitrogen use efficiency was reverse. It was indicated that, under no N application condition, the variation of nitrogen efficiency because of nitrogen use efficiency was decreased and variation of nitrogen efficiency because of nitrogen absorption efficiency was increased.]]>Balko, L.G. and W.A. Russell,1980256579Balko, L.G. and W.A. Russell,1980258194Bertin, P. and A. Gallais,2000455366Beauchamp, E.G., L.W. Kannenberg and R.B. Hunter,197668418422Christian, M., K. Maria, K. Bettina, O. Ariane and C.B. Heiko,19991999Di Fonzo, N., M. Motto, T. Maggiore, R. Sabatino and F. Salamini,19822789796Dudley, J.W., R.J. Lambert and I.A. DE LA Roche,197717111117Grami, B. and L.J. La Croix,197757619624Kessel, B. and H.C. Becker,1999Brassica napus L.). New horizons for an old crop.]]>1999Lafitte, H.R. and G.O. Edmeades,199439114Liu, J.M., G.H. Mi and F.S. Zhang,19997248254Liu, J.A., G.H. Mi, F.J. Chen and F.S. Zhang,20028276281Landbeck, M.V.,1995Kamh, M., W. Franz, U. Abdullah and J.H. Walter,2005Brassica napus L.) cultivars differing in nitrogen efficiency.]]>168130137Dreccer, M.F., G.A. Slafer and R. Rabbinge,2000220189205Norusis, M.J.,1990Mi, G.H., J.A. Liu and F.S. Zhang,1998397104Moll, R.H., E.J. Kamprath and W.A. Jackson,198727181186Mollers, C., B. Kessel and M. Kahlmeyer,2000Moll, R.H., E.J. Kamprath and W.A. Jackson,198274562564Monaghan, J.M., J.W. Snape, A.J.S. Chojecki and P.S. Kettlewell,2001122309317Pei, X.X., J.A. Wang, J.Y. Dang and D.Y. Zhang,2007139398Pollmer, W.G., D. Eberhard, D. Klein and B.S. Dhillon,1979198285Rathke, G.W., T. Behrens and W. Diepenbrock, 2006Brassica napus L.): A review.]]>11780108Reed, A.J., F.E. Below and R.H. Hageman,198066164170Rizzi, E., C. Balconi, L. Nembrini, F.M. Stefanini, F. Coppolino and M. Motto,1993382330Hardy, R.W.F., R.D. Holsten, E.K. Jackson and R.C. Burns,19682 fixation: Laboratory and field evaluation.]]>4311851207Russell, W.A.,198429141150Sattelmacher, B., W.J. Horst and H.C. Becker,1994157215224Simmonds, N.W.,199567309315Schjoerring, J.K., J.G.H. Bock, L. Gammelvind, C.R. Jensen and V.O. Mogensen,1995Brassica napus L.) as affected by rate of nitrogen application and irrigation.]]>177255264Seiffert, B., Z. Zhou, M. Wallbraun, L. Getrud and M. Christian,2004Brassica napus L.) and its effect on traits related to nitrogen efficiency.]]>121656665Wiesler, F., T. Behrens and W.J. Horst,200116169Wiesler, F., T. Behrens and W.J. Horst,20012001pp: 60-61pp: 60-61Wang, Y., G.H. Mi, F.J. Chen and F.S. Zhang,200323297302Xu, X.Y., M.M. Zhang, B.N. Zhai, S.X. LI, X.C. Zhang and Z.H. Wang,200612495499Yan, S.K. and N. Thurling,1987Brassica natus L.) cultivars and its relationship to nitrogen uptake and utilization.]]>16139155Yan, S.K. and N. Thurling,1987Brassica natus L.) and its exploitation through selection.]]>98330338