EFFECT OF NITROGEN RATES AND IRRIGATION REGIMES ON YIELD AND YIELD COMPONENTS OF BREAD WHEAT (Triticum aestivum L.) GENOTYPES UNDER NEWLY RECLAIMED LAND CONDITIONS

The present investigation was carried out during 2002/2003 and 2003/2004
growing seasons at Nubaria Aqriculture Research Station. A split split plot design
was used. The objectives of this investigation was aimed to study the effect
of irrigation treatments (two, three and five irrigations), the nitrogen fertilizer rates (72,
144 'and 216 Kg N I hal on productivity of some bread wheat genotypes. The main
results could be summarized as follows:
1- Results showed that full irrigation treatments significantly maximized grain yield t
ha and its components. There is insignificant differences between two
irrigations treatment or three irrigations treatment on number of sptkes/rn" and
number of grains f spike, grain yield tha which reduced by 17.57 and 4.82 %
compared with full irrigation treatment.
2-lncreasing nitrogen fertilizer rates from 72, 144 to 216 Kg N/ha significantly
increased number of splkes/rn'', number of grains t spike, straw, grain and
biological yields tha and harvest index.
3-Results indicated that Bhrikuti, CM 85836 and ICW 92 genotypes were recorded
highest grain yield fha, number of grains 1 spike, and 1000 grain weight without
significant differences between them.
In general, it could be recommended that utilization of five irrigations and
addation of 216 Kg N fha could give the highest wheat yield under newly reclaimed
land conditions.