Zayed,, B., El-Ekhtyar, A., El Abd, A., Badawi, M. (2006). RESPONSE OF HYBRID AND INBRED RICE VARIETIES TO VARIOUS NITROGEN LEVELS UNDER SALINE SOIL CONDITIONS.. Journal of Plant Production, 31(12), 7497-7509. doi: 10.21608/jpp.2006.236409
B. A. Zayed,; A. M. El-Ekhtyar; A. B. El Abd; M. A. Badawi. "RESPONSE OF HYBRID AND INBRED RICE VARIETIES TO VARIOUS NITROGEN LEVELS UNDER SALINE SOIL CONDITIONS.". Journal of Plant Production, 31, 12, 2006, 7497-7509. doi: 10.21608/jpp.2006.236409
Zayed,, B., El-Ekhtyar, A., El Abd, A., Badawi, M. (2006). 'RESPONSE OF HYBRID AND INBRED RICE VARIETIES TO VARIOUS NITROGEN LEVELS UNDER SALINE SOIL CONDITIONS.', Journal of Plant Production, 31(12), pp. 7497-7509. doi: 10.21608/jpp.2006.236409
Zayed,, B., El-Ekhtyar, A., El Abd, A., Badawi, M. RESPONSE OF HYBRID AND INBRED RICE VARIETIES TO VARIOUS NITROGEN LEVELS UNDER SALINE SOIL CONDITIONS.. Journal of Plant Production, 2006; 31(12): 7497-7509. doi: 10.21608/jpp.2006.236409
RESPONSE OF HYBRID AND INBRED RICE VARIETIES TO VARIOUS NITROGEN LEVELS UNDER SALINE SOIL CONDITIONS.
1Rice Research and Training Center, Sakha, Kafr EI-shlelrh, Field Crops Research Institute. ARC.
2Agronomy Department, Faculty of Agriculture, Mansoura University. Egypt-
Abstract
Two field experiments were conducted in the two seasons of 2005 and 2006
at the experimental farm of El Sirw Agriculture Research Station, Dammeitta. Egypt
to study the response of some inbred and hybrid rice varieties (Sk 2034H .Sk2025H
.SKZOSBH .Giza 177.Giza 178 and Sakha 104) to various nitrogen levels ( O. 60. 120.
180and 240 kg N [ha ).The experimental soil was clay with ECe levels of 7.89 and
8.25dS m'1 in 2005 and 2006 seasons respectively. The growth .yield attributes.
yield and nitrOQen— use efficiencies of the tested rice varieties under the
aforementioned nitrogen levels were determined. The tested rice varieties showed
great variation in their growth .yield attributing characters and grain and straw yields
as well as their nitrogen use efficiencies . Hybrid rice variety of Sk2034H surpassed
other tested rice varieties while the worst one was the salt sensitive variety Giza 177.
Hybrid rice variety SK2034H had higher nitrogen-use efficiency than inbreeds. except
physiological efficiency index of absorbed nitrogen (PIEN) where. its highest value
was given by Giza 177
Increasing nitrogen levels significantly improved growth .yield attributes and
grain and straw yields. Furthermore. each unit increase in nitrogen levels led to
significant increase in growth. yield attributing characters and yield of rice. The
maximum grain yield was produced with the addition of 240 kg N/ ha. The nitrogen
uptake . nitrogen use efficiency (NUE). apparent recovery (%) and physiological
efficiency index of absorbed nitrogen (PEIN) were significantly higher at lower
nitrogen level and decreased significantly with increasing N levels . The response of
the investigated inbred and hybrid rice varieties to nitrogen levels significantly varied .
The most rice varieties significantly responded to nitrogen up to 180 kg NI ha . The
inbred rice varieties Giza 177 and Sakha 104 significantly responded to nitrogen level
up to 240 kg Nlha.
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