El Sayed, S., Hammad, S. (2007). EFFECT OF NITROGEN AND POTASSIUM LEVELS ON AGRONOMIC AND QUALITY TRAITS IN THREE BREAD WHEAT CULTIVARS. test, 32(7), 5139-5153. doi: 10.21608/jpp.2007.208893
Soad A. El Sayed; S. M. Hammad. "EFFECT OF NITROGEN AND POTASSIUM LEVELS ON AGRONOMIC AND QUALITY TRAITS IN THREE BREAD WHEAT CULTIVARS". test, 32, 7, 2007, 5139-5153. doi: 10.21608/jpp.2007.208893
El Sayed, S., Hammad, S. (2007). 'EFFECT OF NITROGEN AND POTASSIUM LEVELS ON AGRONOMIC AND QUALITY TRAITS IN THREE BREAD WHEAT CULTIVARS', test, 32(7), pp. 5139-5153. doi: 10.21608/jpp.2007.208893
El Sayed, S., Hammad, S. EFFECT OF NITROGEN AND POTASSIUM LEVELS ON AGRONOMIC AND QUALITY TRAITS IN THREE BREAD WHEAT CULTIVARS. test, 2007; 32(7): 5139-5153. doi: 10.21608/jpp.2007.208893

EFFECT OF NITROGEN AND POTASSIUM LEVELS ON AGRONOMIC AND QUALITY TRAITS IN THREE BREAD WHEAT CULTIVARS

Journal of Plant Production
Article 4, Volume 32, Issue 7, July 2007, Pages 5139-5153    PDF (690.31 K)
Document Type: Original Article
DOI: 10.21608/jpp.2007.208893
Authors
Soad A. El Sayed1; S. M. Hammad2
1Seed Technology Dep. , Field Crops Research Institute, ARC.
2National Wheat Research Program, Field Crops Res. Institute, ARC.
Abstract
A filed experiment was conducted to determine the effect of different  nitrogen and  potassium levels on the yield and its component and quality traits of three bread wheat cultivars  Sakha 93, Sakha 94 and Giza 168 at Sakha Agricultural Research Station, ARC,  during the two successive seasons 2004/2005 and 2005/2006. Nitrogen doses used were 0, 50, 75 and 100 kg N/fad and potassium levels were 0 and 24 kg P2O5/fed.   The results  indicated that Sakha 94 gave the highest number of kernel/spike, number of spikes/m2 and grain yield/fed. and it was the latest in heading. Increasing nitrogen levels up to 100 kg N/fad. resulted in significant gradual increase in days to heading and days to maturity, plant height, number of spikes/m2, number of  kernels/spike, and grain yield/fad. There was no significant effect for potassium fertilization levels on the tested agronomic characters.
All fertilizing treatments resulted in increasing crude protein, total soluble protein (albumins, globulins, gliadins and glutemins), non-soluble protein, and the grain storability (aging test). Gluten quality (gliadins and glutenins) was also improved.  At higher nitrogen and potassium fertilization levels, there was a negative correlation between storability, crude protein, total soluble protein, non-soluble protein, gluten quality and each of carbohydrate and oil content in grains. However, interaction of nitrogen fertilizer supply and cultivar had a significant effect on gluten quality, and most quality characters.
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