SEEDING AND NITROGEN RATES REQUIRED TO MAXIMIZE YIELD OF GEMMEIZA 9 WHEAT CULTIVAR IN EASTERN DELTA REGION | ||
| Journal of Plant Production | ||
| Article 20, Volume 34, Issue 5, May 2009, Pages 4991-5002 PDF (569.53 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2009.117351 | ||
| Authors | ||
| A. A. Mansour; A. H. Bassiouny | ||
| Plant Production Dept., Inst. of Efficient Prod., Zagazig Univ., Egypt | ||
| Abstract | ||
| Two field experiments were carried out at Bany-Amer, Zagazig District, Sharkia Governorate, Egypt during 2006/2007 and 2007/2008 seasons to study the effect of four seeding rates (45, 55, 65 and 75 kg/fad) and five levels of nitrogen fertilizer (30, 45, 60, 75 and 90 kg N/fad) on yield and its components as well as yield analysis of Gemmeiza 9 wheat cultivar in Eastern Delta Region. The increase in seeding rates from 45 to 75 kg/fad significantly decreased number of grains/ spike and 1000-grain weight. Grain and biological yields/ fad significantly increased by increasing seeding rates from 45 to 55 or 65 kg/fad, while number of spikes/m2 and straw yield/fad responded to the increase in seeding rates up to 75 kg/fad. However, the differences in grain weight/spike and both harvest and crop indices due to seeding rates were not significant. Each of 1000-grain weight, straw and grain yields/fad responded to N application up to 60 kgN/fad, while number of spikes/m2, number of grains/spike and grain weight/spike responded to N application up to 90 kg N/fad. However, the response of biological yield/fad to N fertilization was up to 75 kg N/fad. Grain yield/fad was positively and significantly correlated with each of number of spikes/m2, number of grains/spike, grain weight /spike, 1000-grain weight, straw yield/fad and biological yield/ fad. The main sources of grain0yield variation according to their relative importance were number of spikes/m2 (61.18%), number of grains/spike (18.1s%) and 1000-grain weight (4.65%). The direct and indirect effects of these characters amounted to 95.96% of whuat grain$yield variation. Vegression analysis revealed that grain yield of wheat could be increased by split|ing the suétable nitvogen(amount in order to be active in increasing 1000-grakn weight. From this study it can be recommended by using 65 kg seeds / fad and 60 kg N/fad to maximizewheat productivity of Gemmeiza 9 in Eastern Delta Region. | ||
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