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Asian Journal of Crop Science
  Year: 2014 | Volume: 6 | Issue: 2 | Page No.: 150-157
DOI: 10.3923/ajcs.2014.150.157
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Effect of Sowing Date on Dry Matter Accumulation and Nitrogen Partitioning Efficiency of Some Wheat Cultivars

M.E. El-Temsah, M.A. Fergany and M.S. El-Habbal

The principle aim of this study was to investigate the response of the bread wheat cultivars to sowing dates. This study reveals one of the methods to handle the climate changes in Egypt. Two field experiments were carried out in Agric. Expt. Farm at Shalakan, Kaleobia Governorate, Egypt during 2010/2011 and 2011/2012 growing seasons. Each experiment included 15 treatments which were the combination between three wheat cultivars (Giza 168, Sakha 93 and Gemmiza 9) and five sowing dates (October 1, October 16, November 1, November 16 and December 1). The experimental design used was split plot design in 6 replications. The obtained results reveal that both sowing dates and wheat cultivars significantly affected dry weight of blades, tillers (stems and sheaths) and spikes of wheat cultivars at different growth stages. The percentages of blades and stems+sheaths were at the highest values at booting stage and in favor of wheat Gemmiza 9 cultivar followed by Giza 168 and Sakha 93. As the plants advanced towards maturity the percentage distribution of blades and stems+sheaths were markedly reduced. These reductions were accompanied with increase of spikes percentage of total plant dry weight ranging from 44.1 for Giza 168-45.4% for Sakha 93. The percentages distribution of plant organs of wheat cultivars was significantly varied. Under the conditions of this work sowing wheat plants at 1st November exhibited statistically maximum dry weight and percent distribution of blades, tillers and spikes in early. Sowing wheat plants cultivar Gemmiza 9 in 1st November exhibited maximum Nitrogen Use Efficiency (NUE), N Recovery Efficiency (NRE) and Nitrogen Harvest Index (NHI).
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How to cite this article:

M.E. El-Temsah, M.A. Fergany and M.S. El-Habbal, 2014. Effect of Sowing Date on Dry Matter Accumulation and Nitrogen Partitioning Efficiency of Some Wheat Cultivars. Asian Journal of Crop Science, 6: 150-157.

DOI: 10.3923/ajcs.2014.150.157






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