EFFECT OF NITROGEN FERTILIZATION ON GROWTH AND YIELD COMPONENTS AND ESTIMATION OF SOME GENETIC PARAMETERS IN FIFTEEN COTTON GENOTYPES UNDER GYPSIFEROUS SOIL | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 19, Issue 6, October 2014, Pages 0-0 | ||
| Authors | ||
| A. H. Abdulla; A. S. Khalaf | ||
| Abstract | ||
| A field experiment was carried out during 2012 season at Field Crop Station, College of Agriculture, Tikrit University. The study included the effect of three levels of nitrogen fertilizer (0, 60 and 120 kg urea/ D) and 15 genotypes of upland cotton R.C.B.D. design by split plot arrangement with three replication, levels of nitrogen fertilizer were in main plots, whereas the in sub genotypes in sub plots. Data recorded for 11 traits: no. of days to 50% flowering, plant height, height of first fruiting branch, no of vegetative and fruiting branch, no of opened bolls, boll weight, and earliness percentage, gaining outturn, seed index and total seed cotton yield. The results showed significant differences between nitrogen levels for most traits except plant height, first fruiting branch, boll weight, earliness percentage and gaining outturn, otherwise the genotypes were significantly differed in all studied traits except no. of days to flowering. The genotypes Dierr22 showed surpassed others significantly for plant height, first fruiting branch and no. of fruiting branches traits , while the genotype (Coker310) was surpassed of opened bolls , gaining outturn and total seed cotton yield and the genotype (Lachata) was surpassed for boll weight and earliness percentage . The interaction between 0 level of N and Coker310 showed superiority for no. of opened bolls and gaining outtuen, and the 120 Kg with the same genotype for total of seed cotton yield, and the 60 Kg levels with Lachata genotype for boll weight. Environment, genotypic and phenotypic variances deviated from zero all traits and at all Nitrogen levels except for number of fruiting breaches in case of two variances, environmental and genotypic. Broad sense heritability was high for most traits and at three levels of Nitrogen, while the expeced genetic advance was high for no. of opened bolls, boll weight and seed cotton yield at the three level of Nitrogen | ||
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