RESPONSE OF SOME SUNFLOWER GENOTYPES TO NITROGEN FERTILIZER LEVELS

Authors

1 Dept. Oil Crops Res., Arish Agric. Res. Station, Inst. Field Crop Res., A.R.C., Egypt.

2 Dept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.

3 Dept. Plant Prod., Fac. Environ. Agric. Sci. Arish Univ., Egypt.

Abstract

A field study was carried out during summer seasons of 2018 and 2019 at the Experimental Farm of Faculty of Environmental Agricultural Sciences, Arish University, El-Arish, North Sinai Governorate. Egypt, This study aimed to investigate the response of three sunflower genotypes (Helianthus annus L., i.e. Giza-102, Sakha-53, Line 120 to three nitrogen levels N1=15, N2= 30, N3= 45 kg N fed-1to maximize seed and oil yields of sunflower crop under the newly reclaimed soil and the environmental conditions of North Sinai. Salinity of irrigation water ranged from 4500 to 5500 ppm, using drip irrigation system. The main results were that Giza-102 genotype surpassed the other studied genotypes in plant height (cm), stem diameter (cm),number of leaves per plant, leaves fresh and dry weights  per plant(g), yield attributes, seed and oil yields. There were significant differences between N-fertilizer levels found at most of growth characters, seed and oil yields per feddan. While, oil content decreased.

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