Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2019.291.298LiHongqiao GhafoorAbuzar KarimHassan GuoShixing LiZhuang WuYongcheng SunYuanyuan YanFeng 62019226Background and Objective: For cultivation and high yield of oilseed rape (Brassica napus L.) in China, traditional seedling transplanting is replaced by seed-sowing but, better nitrogen management is crucial and not established yet. This study aimed to adapt N management to the seed-sowing method for the winter oilseed rape and to minimize the N fertilizer-derived pollution potential in the upper reaches of Yangtze River Basin. Materials and Methods: Three field experiments were conducted to check effect of different doses of N fertilizers, split doses of N and different types of N fertilizers for seed-sowing winter oilseed rape with high plant density in upper reaches of Yangtze River Basin in Sichuan province of China. Results: In first experiment, among four doses (0, 90, 180 and 270 kg N ha1) on average 3.54 t ha1 was in 180 kg N ha1 and 3.61 t ha1 in 270 kg N ha1 while cultivars dy6 and cn3 produced 3.23 and 3.29 t ha1 which is significantly higher than zs11. There was no significant difference in N-use efficiency among three cultivars tested and second experiment showed no significant difference in seed yield with split N application. The third experiment compared the effects of different fertilizer types (urea, coated urea, 1:1 mixture of urea and coated urea and compound nitrogen fertilizer) on seed yield and get no significant difference in seed yield. Conclusion: This experiment proved that seed sowing method with higher nitrogen had high yield in the upper reaches of Yangtze River Basin in China, but higher N application may cause environment pollution. So, seed sowing method with nitrogen 180 kg N ha1 was proved to be more effective.]]>Su, W., B. Liu, X. Liu, X. Li, T. Ren, R. Cong and J. Lu,2015Brassica napus L.).]]>623845Yin, Y., X. Liao, B. Yu and H.Z. Wang,201032147151Schjoerring, 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.]]>177255264Barlog, P. and W. Grzebisz,2004Brassica napus L.). I. Growth dynamics and seed yield.]]>190305313Wang, Y., J.W. Lu, X.K. Li, J.F. Li, P.P. Liu, W.M. Xu and Y.Q. Yang,20114444064414Aufhammer, W., E. Kubler and M. Bury,1994172255264Jensen, L.S., L. Christensen, T. Mueller and N.E. Nielsen,199715N-labelled fertilizer N in soil following harvest of oilseed rape (Brassica napus L.).]]>190193202Li, X., T. Yang, Z. Nie, G. Chen, L. Hu and R. Wang,2015Brassica napus L.).]]>66849856Honglin, C., C. Shanghng, S. Xuezhen and G. Zhen,201124872876Yongcheng, W., N. Yingze, G. Shixing and L. Zhuang,2011Brassica napus L.) in Sichuan province past 10 Years.]]>2420542056Miersch, S., A. Gertz and F. Breuer,20165629522961Wang, H.X.,20093719631964Yongcheng, W., N. Yingze, Guoshixing and L. Zhuang,20115116135Jing, C., Z. Chunlei, L. Shoucheng and W. Yongcheng,2011Brassica napus L.).]]>2011125127, 137Bao, S.D.,2000pp: 264-267pp: 264-267Erley, G.S.A., T. Behrens, A. Ulas, F. Wiesler and W.J. Horst,2011124114123Yunfei, Y., L. Shishan and W. Yongcheng, 20171824012405, 2414Hocking, P.J., P.J. Randall and D. DeMarco,199754201220Rathke, G.W., T. Behrens and W. Diepenbrock, 2006Brassica napus L.): A review.]]>11780108Wang, Y., Y. Huang, M. Xin, S. Yuan and G. Kang et al.,20175010311046Li, X.H., Q.B. Li, T.W. Yang, Z.N. Nie, G.X. Chen and L.Y. Hu,2016Brassica napus) to nitrogen application at different stages in Yangtze River Basin.]]>1941220Li, X.H., Q.B. Li, T.W. Yang, Z.N. Nie, G.X. Chen and L.Y. Hu,2016Brassica napus) to nitrogen application at different stages in Yangtze River Basin.]]>1941220Yu, Y.L., Z.G. Wu, Y.Z. Wu, Z.G. Lu, P.N. Zhou, S.N. Wei and F.N. Gu,2001Brassica napus L.) Suyou No .1.]]>234145Diepenbrock, W., G. Fischbeck, K.U. Heyland and N. Knauer,19993rd Edn.,Rathke, G.W., O. Christen and W. Diepenbrock,2005Brassica napus L.) grown in different crop rotations.]]>94101113Sieling, K. and O. Christen, 1997Brassica napus L.).]]>7301306Jackson, G.D.,200092644649Narits, L.,2010Brassica napus L. var. oleifera subvar. biennis).]]>8671686Sieling, K. And H. Kage,201030271279