Hagras, A., El - Ghareib, E., Basstawisi, A., Zayed, B., Abdel Hameid, M. (2012). EFFECT OF DIFFERENT DATES AND RATES OF POTASSIUM FETILIZER APPLICATION ON YIELD OF SAME RICE GENOTYPES UNDER SALINE SOIL CONDITION.. Journal of Plant Production, 3(8), 2299-2309. doi: 10.21608/jpp.2012.84977
A. M. Hagras; E. A. El - Ghareib; A. O. Basstawisi; B. A. Zayed; M. M. Abdel Hameid. "EFFECT OF DIFFERENT DATES AND RATES OF POTASSIUM FETILIZER APPLICATION ON YIELD OF SAME RICE GENOTYPES UNDER SALINE SOIL CONDITION.". Journal of Plant Production, 3, 8, 2012, 2299-2309. doi: 10.21608/jpp.2012.84977
Hagras, A., El - Ghareib, E., Basstawisi, A., Zayed, B., Abdel Hameid, M. (2012). 'EFFECT OF DIFFERENT DATES AND RATES OF POTASSIUM FETILIZER APPLICATION ON YIELD OF SAME RICE GENOTYPES UNDER SALINE SOIL CONDITION.', Journal of Plant Production, 3(8), pp. 2299-2309. doi: 10.21608/jpp.2012.84977
Hagras, A., El - Ghareib, E., Basstawisi, A., Zayed, B., Abdel Hameid, M. EFFECT OF DIFFERENT DATES AND RATES OF POTASSIUM FETILIZER APPLICATION ON YIELD OF SAME RICE GENOTYPES UNDER SALINE SOIL CONDITION.. Journal of Plant Production, 2012; 3(8): 2299-2309. doi: 10.21608/jpp.2012.84977
EFFECT OF DIFFERENT DATES AND RATES OF POTASSIUM FETILIZER APPLICATION ON YIELD OF SAME RICE GENOTYPES UNDER SALINE SOIL CONDITION.
2Rice Res. and Training Centre, Field Crops Res. Institute, ARC,Egypt.
Abstract
Two field experiments were laid out at El-Sirw Agricultural Research Station, (ARC), Damietta Governorate, Egypt, during two successive seasons of 2008 and 2009 to study the effect of some rates, dates and methods of potassium application on growth ( dry mater, leaf area index (LAI) and chlorophyll content) and tillers number/m2, panicle numbers/m2, plant height, panicle length, No. of filled grains /panicle, panicle weight and grain yield (t/fed) of some rice genotypes under saline soil conditions. The potassium treatments were; T1 ( Control), T2 (12 kg K2O as basal (B)) , T3 (12kg K2O as B + 12kg K2Oas B at 60 days after transplanting(DAT)) , T4 (24 kg K2O as B ), T5 (24 kg K2O asB+ 12 kg K2O at 60 DAT), T6 (2% as spray at 30DAT ), T7 (2% as spray at 60 DAT), T8 ( 2% as spray at 30DAT + 2% as spray at 60DAT), T9 (12kg K2O as basal + 2% as spray at 30 DAT ), T10 (12 kg K2O as basal + 2% as spray at 60 DAT), T11 (24 kg K2O as basal + 2% as spray at 30 DAT) and T12 (24 kg K2O as basal + 2% as spray at 60 DAT). Two rice genotypes viz;(EHR1) hybrid and the local inbred Giza178 were used in the present study
The main obtained results could be summarized as following. Rice genotypes significantly varied in their growth traits, yield components and grain yield. Hybrid rice (EHR1) variety significantly surpassed Giza178 rice cultivar.
The potassium treatments significantly affected rice growth, yield and yield components in both seasons. Rice response to potassium fertilizer significantly was up to 24 kg K2O as basal + 2% as spray at 60 DAT, which gave high values of all studied traits.
Egyptian hybrid one EHR1 with 24 kg K2O as basal + 2% as foliar spray at 60 DAT gave high values of estimated growth parameters, yield components and grain yield under current study.
It could be concluded that the treatment of 24 kg K2O/ fad applied as basal +2% as foliar spray at 60 DAT could be recommended under saline soils condition .
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