Effect of Sowing and Harvest Time on Yield of Autumn-Sown Sugar Beet in Moghan Region in Iran

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Abstract

Autumn-sown sugar beet is an important strategy to produce sugar to meet domestic demand in Iran. New bolting resistant sugar beet cultivars can facilitate sowing sugar beet in autumn in warm and semi-warm areas in Iran. Therefore, a field experiment was conducted as split plot arrangement in randomized complete block design with four replications in Ardabil Agricultural and Natural Resources Research Center in 2008-2010 cropping seasons. Experimental factors included: three sowing dates (23 September, 12 October and 01 November), four harvest times (22 May, 22 June, 23 July and 23 August) and three cultivars (resistant, moderately resistant and sensitive). Results showed that cultivars were significantly different (P < 0.05) for bolting rate. Sensitive cultivar with 89.75% bolting rate was significantly different from moderately resistant (41.78%) and resistant (12.23%) cultivars. Effect of sowing time on root, sugar and white sugar yields was not significant. Harvest time had significant (P < 0.05) effect on white sugar yield and sugar content. Shifting of harvest time from 22 May to 22 June significantly increased sugar yield, white sugar and sugar content. Bolting resistant cultivar had higher root, sugar and white sugar yield than the other two cultivars. In conclusion, sowing of bolting resistant sugar beet cultivar in early November and harvesting in late June had the least bolting rate (1.32%), highest root (49.81tha-1), sugar (7.63tha-1) and white sugar (6.26 tha-1) yields in autumn sown sugar beet in Moghan region in Iran.

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Seed and Plant Production Journal
Volume 27, Issue 3
December 2011
Pages 355-371

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