EsmaeilYasari and A.M. Patwardhan
Abstract
For investigating the impacts of chemical nutrients on canola (Brassica napus L.) seed yield and quality (oil, protein and nutrients concentration), a split-plot fertilizer application experimental design in 4 replications was carried out during the 2004-2005 growing season, at the Baiecola Agricultural Research Station in the Mazandaran province of Iran. Canola was grown as a second crop in rotation after wheat. Application of N P K together with S, and Zn, singly or in combination, improved the yield and the quality of the seed. The maximum yield (3141.250 kg/h) and oil content (45.83 %) were obtained at Tip (NPK, Zn), coinciding with 203 pods/plant and 120.53 cm plant height. The application of NPK, S at T9 resulted not only in the maximum seed protein (24.25 %) and N concentration in the seed (3.88 %) but also in highest concentration of P (0.257 %), K (1.853 %) and S (130 ppm) in the leaves at flowering. The maximum N concentration happened with NPK at T8(3.85 %) while the maximum Zn concentration obtained with NPKZn at T10(27.17 ppm). The P, K, S and Zn concentrations in the seed were maximum at T7 (0.69 %), T7.10 (0.66 %) T9 (0 37 %) and at T10(55.03 ppm), respectively, showing substantial improvements over the control.