بررسي اثرات نيتروژن و تراكم گياهي بر عملكرد و اجزاي عملكرد ارقام مختلف كلزا

Effects of Nitrogen and plant density on yield and yield components of different Rape seed (Brassica napus) cultivars

This experiment was carried out in farm of Damavand in 2006 using factorial randomized complete block design with three replication. The factor was three levels of nitrogen fertilizers: Nl= No application of N, N2= application of 100 kg/ha, N3= application of 200 kg/ha of nitrogen with four levels of varieties: Vl= Olpro, V2= SLM046, V3= Elvis, V4= Opera and four densities: Dl= 30m2, D2= 40m2, D3= 50m2, D4= 60m2. In this evaluation, most stage of plant phonology such as plant height, pod number in plant, seed number in pod, 1000 seed weight and seed yield were measured. Results showed that Elvis with mean yield 4667 kg/ha and Olpro with mean 1000 seed weight 3.912 gr had superior points. Interaction of V1N3, N3D2 and V1D2 was higher all than other levels in 1000 seed yield. Interaction of V3N3 , N2D3 and V3D2 was higher all than other levels in seed yield and interaction VN and ND had significant effect on seed yield and 1000 seed weight %1 level.