Influence of nitrogen and sulfur in yield and seed quality of three canola cultivars
2010
Bahmanyar, Mohammad Ali | Poshtmasari, Hossein Kazemi
In order to investigate the effect of nitrogen (N) and sulfur (S) fertilizers on yield and seed quality of three canola cultivars, a factorial based on randomized complete block experiment was conducted during 2005-2006 in Iran. Treatments included four nitrogen rates (0, 75, 150, and 225 kg N ha-1 source of urea), four sulfur rates (0, 100, 200, and 300 kg S ha-1), and three cultivars ('Pf', 'Option-500', and 'Hyola-401'). Results indicated cultivar had a significant effect on all studied traits. 'Option-500' and 'Hyola-401' cultivars had the highest seed yield, protein content, and N:S ratio in seed. The levels of 150 and 220 kg N ha-1 resulted in the maximum protein content. Increasing N levels resulted in N content and decreased the oil content. The interaction effect between S and N levels showed the highest N content in seed was obtained with 300 kg S ha-1 and 225 kg N ha-1.
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