Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.1530.1540DaneshvarMashallah Tahmasebi SarvestaniZeinalaabdine Modarres SanavySeyed Ali Mohammad 1220081112In order to investigate the effect of irrigation and nitrogen fertilizer
on agronomical and physiological traits of two winter rapeseed varieties,
an experiment was established in a randomized complete block design as
split-plot factorial arrangement with four replications in 2005-2006 at
Agricultural Research Station of Khorramabad, Iran. Irrigation as main-plot
factor consisted of four levels (I60, I90, I120
and I150). Sub-plot factors included nitrogen in four levels
(N0, N70, N140 and N210 kg
N ha-1) and two varieties (Zarfam and SLM046). Thousand-seed
weight (TSW) in all irrigation and nitrogen levels was lower in the 2006
than that of the 2005. Seed oil percentage (SOP) was decreased with increasing
water use only in second year. As nitrogen rate increased, SOP decreased
and seed oil yield (SOY) increased in the 2006 significantly (p<0.05).
With increasing water supply, SOY increased in first year. Zarfam variety
had a higher TSW and SOP in both years. According to combined analysis
results, seed and oil yield were not significantly affected by irrigation
treatments and rapeseed varieties. Seed yield had not significant difference
between 70 to 210 kg N ha-1 treatments. Both Water Use Efficiency
(WUE) and dry matter remobilization efficiency (DMRE) were increased by
decreasing water supply in I90 to I150 treatments.
But N0 and N210 resulted in the lowest WUE and DMRE,
respectively. Considering all traits, the first year of experiment was
better than second year. The irrigation x variety interaction had a significant
(p<0.01) effect on seed yield and WUE. Generally, I150N70V1
combination is recommended in the region of the study due to high performance
in production of seed and oil yield.]]>Abedl Gawad, A., A. El-Tabbakh and A. Shetaia,199035279293Al-Kaisi, M.M. and X. Yin,20039514751482Ali, N., F. Javidfar, J.Y. Elmira and M.Y. Mirza,2003Brassica napus L.).]]>35167174Anonymous, 20032003Anonymous,20062006Banuelos, G.S., D.R. Bryla and C.G. Cook,200215137145Blum, A., G. Golan, J. Mayer, B. Sinmena, L. Shpiler and J. Burra,1989438796Blum, A.,19981007783Bybordi, A. and M.J. Malakouti,20021718Clarke, J.M., T.F., Townley-Smith, T.N. McCaig and G. Green,198424573970Cuenca, R.H.,19891st Edn.,Pages: 552Pages: 552Dadivar, M., M. Khodshanas, J. Vaziri and G. Ghadbeglo,20032003pp: 10351036Daneshmand, A., A.H. Shirani-Rad and J. Daneshian,2007Brassica napus L.) genotypes as affected by soil water availability -(Agronomy Section).]]>2007pp: 244Dehshiri, A., M.R. Ahmadi and S. Zeinalabedin Tahmasebi,200132649659Diepenbrock, W.,2000Brassica napus L.): A review.]]>673549Ehdaie, B., G.A. Alloush and J.G. Waines,20081063443Faraji, A.,200419435446Faraji, A. and A. Soltani,200723191202Gomez, K.A. and A.A. Gomez,19842nd Edn.,Pages: 704Pages: 704Goosheh, M., M. Saremi and V. Vaziri,200620164171Gunasekera, C.P., L.D. Martin, R.J. French and K.H.M. Siddique,20042004Haefele, S.M., S.M.A. Jabbar, J.D.L.C. Siopongco, A. Tirol-Padre, S.T. Amarante, P.C. Stacrus and W.C. Cosico,2003Oryza sativa L.) genotypes under different water regimes and nitrogen levels.]]>107137146Halvorson, A.D., B.J. Wienhold and A.L. Black,200193836841Hocking, P.J., P.J. Randall and D. DeMarco,199754201220Jackson, G.D.,200092644649Kage, H., C. Alt and H. Stutzel,2003141116Kajdi, F.,1994364450Khademi, Z., H. Rezie, M.J. Malakouti and P. Mohajer Milani,19991999Khan, S., Farhatullah and I.H. Khalil,20083:4 Brassica populations for quantitative and qualitative traits.]]>33842Kimber, D.S. and D.L. McGregor,19951st Edn.pp: 394pp: 394Kramer, P.J. and J.S. Boyer,19951st Edn.,pp: 491-495pp: 491-495Kumar, R., A.K. Sarawgi, C. Ramos, S.T. Amarante, A.M. Ismail and L.J. Wade,200698111Lewis, G.L. and N. Thurling,19943493103Ludwiga, B., G. Schmilewskib and T. Terhoeven-Urselmansa,20061098691Mailer, R.J. and P.S. Cornish,1987Brassica napus L.) and turnip rape (Brassica rapa L. var silvestris Lam Briggs).]]>70399407Mailer, R.J. and N. Wratten,19871987pp: 661673Mingeau, M.,197436111Nielsen, D.C.,199710307313Norton, R.M.,19891989pp: 222227Ozer, H.,200319453463Pang, X.P., J. Letey and L. Wu,199761257261Papakosta, D.K. and A.A. Gagianas,199183864870Poma, I., G. Venezia and L. Gristina,1999Brassica napus L. var Oleifera D.C.) ecophysiological and agronomical aspects as affected by soil water availability.]]>1999Raymer, P.L.,20022002pp: 122-126pp: 122-126SAS,19961996Shekari,20002000Smith, C.J., G.C. Wright and M.R. Woodroofe,1988Brassica napus) production in South-Eastern Australia. II. nitrogen accumulation and oil yield.]]>91525Sovero, M.,19931993pp: 302-307pp: 302-307Starner, E.D., H.L. Bhardwaj, A. Hamama and M. Rangappa, 19961996pp: 287-290pp: 287-290Thompson, J.A.,197818276281Tunturk, M. and V. Ciftci,2007Brassica napus ssp. oilefera L.) cultivars by using correlation and path analysis.]]>398184Ercoli, L., L. Lulli, M. Mariotti, A. Masoni and I. Arduini,200828138147