Effect of sowing date on yield and yield components of bread wheat cultivars under environmental conditions of Sohag region

The Journal of Environmental studies (JES) 
Vol. (15), 12 pages
Author:Othman 'M. El-Maghraby
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Afield experiment was conducted to determine the effect of three planting dates; early (25th Oct.), optimum (25th Nov.) and late (25th Dec.) on yield, yield components and grain quality of four bread wheat (Triticum aestivum L.) cultivars; Shandaweel 1, Sids 12, Giza 168 and Sakha 93, at Shandaweel Agricultural Research Station, (ARC), during the two successive growing seasons of 2012/2013 and 2013/2014. Sowing dates and cultivars both significantly affected the number of spikes/m2, number of kernels/spike, 1000-kernel weight, grain yield, straw yield, grain protein and carbohydrate percentage. Yield and yield components of wheat sown on November 25 were significantly increased compared to those sown on October 25 and December 25 from studied aspects. Delayed sowing adversely affected the yield and yield components and carbohydrate %, while it increased the grain protein %. Considering overall sowing performance of all cultivars, Shandaweel 1 produced highest yield followed by Sids 12, Giza 168 and Sakha 93.


Wheat, Sowing date, yield, yield components, grain protein, grain carbohydrate.