Effect of nitrogen rate on seed yield, protein and oil content of two canola (Brassica napus L.) cultivars

Authors

  • Hashem AMINPANAH Department of Agronomy and Plant Breeding, Rasht Branch, Islamic Azad University, Rasht, Iran

DOI:

https://doi.org/10.14720/aas.2013.101.2.14909

Keywords:

canola, nitrogen rate, oil, protein

Abstract

A field experiment was conducted at Rice Research Station, Tonekabon, Iran, to determine the effect of N rate on seed yield, protein and oil content of two canola (Brassica napus L.) cultivars. Two canola cultivars (‘Hayola-308’ and ‘RGS-003’) and five N rates (0, 50, 100, 150, and 200 kg ha­-1), organized into a randomized complete block design with a factorial treatment arrangement and three blocks, were applied to plot areas. Results showed that N rate effect was significant (< 0.01) for seed yield, protein content and yield, and oil yield but not for oil content. On the other hand, cultivar had only significant (< 0.01) effect on seed protein and oil content. Moreover, the interaction between N rate and cultivar was significant at < 0.01 for seed, protein and oil yield, illustrating that cultivars showed different responses to N rates for these traits. In general, the quadratic equation provided a good description of the relationship between seed, protein and oil yield and nitrogen rate. For ‘Hayola-308’, seed, protein and oil yield increased significantly as N application rate increased from 0 to 150 kg ha-1, but thereafter remained constant. In contrast, for ‘RGS-003’, seed, protein and oil yield increased significantly as N application rate increased from 0 to 200 kg ha-1. Therefore, at the highest N application rate (200 kg ha-1), ‘RGS-003’ produced greater seed, protein and oil yield than ‘Hayola-308’. Averaged across N application rate, the seed protein content of RGS-003 was significantly (< 0.01) higher than that of ‘Hayola-308’, while the opposite result was observed for seed oil content. This study demonstrated the differential response of two canola cultivars to N rate in terms of seed, protein and oil yield.

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Published

13. 11. 2013

Issue

Section

Original Scientific Article

How to Cite

AMINPANAH, H. (2013). Effect of nitrogen rate on seed yield, protein and oil content of two canola (Brassica napus L.) cultivars. Acta Agriculturae Slovenica, 101(2), 183–190. https://doi.org/10.14720/aas.2013.101.2.14909

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