Title: Effects of Nitrogen Rates and Splitting on Oil Content and Seed Yield of Canola (Brassica napus L.)
Abstract: In order to investigate the effect of nitrogen rates and splitting on oil and seed yield of canola, a field experiment was conducted at Jouybar (Iran) in 2008. The experimental was evaluated in a split-plot with two rates of nitrogen fertilizer N , N kg N ha and check (N ) and three nitrogen splitting T (50% in sowing time 100 200 0 1 1 and 50% in stem elongation (bolting) begins), T (25% in sowing time, 50% in stem elongation (bolting) begins 2 and 25% in first flower opens growth stage) and T (25% in sowing time, 25% in stem elongation (bolting) 3 begins and 25% in first flower opens and 25% in flowering ends). Results indicated that N had higher seed, 200 straw and biological yield than N , so that seed yield relation to check had increased 111and 82%, 100 respectively. T had the highest straw and biological yields ,while T had the lowest, respectively. The highest 13 and lowest oil content was obtained with T and T , respectively. The highest and the lowest nitrogen content 23 was obtained with T and T , respectively. N had greater number of pods per plant and number of seeds per 3 1 200 pod than N. T and T had the greatest and the least number of pods per plant and also number of seeds per 100 2 3 pod, respectively. In interactions, Number of pods per plant and number of seeds per pod was the greatest at N T and the least at N T. Interaction of N T and N T had the highest and the lowest seed oil content; 200 2 100 3 100 2 100 3 respectively. The interaction between N and T and between N T had the highest and the lowest seed 200 3 100 and 1 nitrogen content, respectively. The interaction between N and T and between N T had the highest and 200 2 100 and 3 the lowest seed yield, respectively. There is positive correlation between seed yield and number of pods per plant. Consequently, low nitrogen and high splitting application decreased oil content , whereas, seed yield and oil yield were increased by increasing nitrogen rates.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 12
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