EVALUATION OF SOME PROMISING SAFFLOWER GENOTYPES UNDER DIFFERENT NITROGEN LEVELS IN SALTED AFFECTED SOILS OF WADI EL-NATROON, EGYPT

doi:10.12816/ejpb.2025.463715

EVALUATION OF SOME PROMISING SAFFLOWER GENOTYPES UNDER DIFFERENT NITROGEN LEVELS IN SALTED AFFECTED SOILS OF WADI EL-NATROON, EGYPT

Document Type : Original research

10.12816/ejpb.2025.463715

Abstract

A field experiments was carried out at the Agricultural Experiments Desert Station of the Faculty of Agriculture, Cairo University in Wadi El-Natroon, El-Beheira Governorate, Egypt, during 2006/2007 and 2007/2008 seasons to study the response of 6 local and 7 introduced safflower (Carthamus tinctorius L.) genotypes to four nitrogen levels (30,45,60 and 75 kg N/fed) under sprinkler irrigation system. The objectives of this research were to find out the best genotype(s) to be grown under the stress conditions and to determine the optimum nitrogen level for each genotype. A split-plot design was used. The main plots were devoted to the nitrogen levels and sub-plots to genotypes. Nitrogen level of 75 kg N/fed recorded the highest values of plant height, number of branches/plant, number of capitula/plant, number of seeds/capitulum, seed yield/plant, seed index, seed oil percentage, seed and oil yield/fed, as well as water use efficiency (WUE). Two local genotypes (Bani-Suef and 3 Aswan), as well as, three exotic genotypes (Demo-137, Turkey-168 and S-350) surpassed the other genotypes in seed yield, oil yield/fed and WUE. The interaction between nitrogen levels and genotypes was significant for seed oil percentage, seed yield, oil yield and WUE. The highest seed yield, oil yield and WUE were realized for Aswan genotype fertilized with 75 kg N/fed. The correlation study shows significant and positive association between seed yield and most studied characters.

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