INFLUENCE OF SOWING DATE AND NITROGEN FERTILIZATION ON YIELD AND ITS COMPONENTS IN SOME BREAD WHEAT GENOTYPES | ||
| Egyptian Journal of Agricultural Research | ||
| Article 15, Volume 89, Issue 4, December 2011, Pages 1413-1433 PDF (431.22 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2011.179065 | ||
| Authors | ||
| NADYA A. R. ABDEL NOUR1; HAYAM, S. A. FATEH2 | ||
| 1Field Crops Research Institute, Agricultural Research Center, Giza, Egypt. | ||
| 2Lab. for Design and Statistical Analysis Research, Agricultural Research Center, Giza, Egypt. | ||
| Abstract | ||
| Two Field trials were conducted at kafr El- Hamam Sharkia (Egypt) Agricultural Experimental Research Station during 2008/2009 and 2009/2010seasons. The objective of this investigation was to study the effect of sowing dates (recommended and late) and rates of 25,50 and75 kg N/ fedan on yield and component of eight wheat genotypes, i.e. Gemmeiza 9/ Dovin-2, Sakha 93/ Dovin-2, Giza 168/ Dovin-2, Dovin-2, Shandaweel 1, Gemmeiza 10, Sides12 and Sakha 93. The results showed that all the studied traits were significant in the recommended compared to the late dates planting. Number of days to heading decreased when the sowing date was delayed. The earliest genotype for heading date was Sakha 93, while the genotypes Gemmeiza 9/Dovin-2 and Sakha 93/ Dovin-2 were the latest for this trait. The recommended sowing date produced the highest number of spikes/m2, number of kernels/spike, 1000- kernel weight, biological yield and grain yield. Genotypes Sakha 93/Dovin-2, Giza 168/Dovin-2, Dovin-2 and Gemmeiza 10 gave the greatest value of number of spike/m2, number of kernel/ spike, 1000- kernel weight, biological yield and grain yield. Heading date, days to maturity, number of spikes/m2, 1000- kernel weight, biological yield and grain yield were increased with the increments of nitrogen application levels up to 75kg N/fed. The interaction between sowing date and cultivars had significant effect for all studied traits. However, the interaction between sowing dates and nitrogen fertilizer levels was significant for all characters except number of kernels/spike, plant height and 1000-kernel weight. The interaction between sowing date, genotypes and nitrogen fertilizer levels was significant for all characters except plant height, 1000- kernel weight and biological yield. Furthermore, factor analysis determined three hidden factors by extraction of static roots and also by principal components analysis which justified 75.75% of data variation as a whole. The first factor with the most percent of justified variance of data and was called effective factor to yield. The second factor included genotypes and third factor included nitrogen fertilizer. The finding of this investigation may help both biologists and breeders in determining traits that could be selected for high yield. | ||
| Keywords | ||
| Bread wheat; Genotypes; Sowing date; Hidden Factors | ||
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