Response of Growth, Yield and Yield Components of two Sunflower Varieties (Helianthus annuus L.) to Nitrogen Fertilization

Volume 17 , Issue 4 , December 2015 , Pages 241-252

Authors

¹ Faculty of Agriculture, University of Sulaimani

A field study was conducted at spring 2013 in the experimental farm of the Faculty of

Agricultural Science, University of Sulaimany at Bakrajo, to evaluate the response of

some growth characters, yield and yield components of two varieties Flame and Sirena

and three Nitrogen fertilization on growth and yield sunflower (Helianthus annaus L

.).The experiment comprised of two varieties of sunflower (Flame and Sirena) and

Nitrogen fertilization levels (0, 100 and 200) Kg (urea) ha-1. Arranged as Split-Plot in

Randomized Completely Block Design with three replications. performances in term

of plant height, leaves number and stem diameter were evaluated. The important

character of yield, yield components and growth were also evaluated. The Nitrogen

fertilizer levels were implemented in the main plots and varieties implemented in the

sub-plots. The results showed no significant differences between varieties in growth

characters with exception of stem diameter, while it was found to be significant on all

yield characters with exception of disk diameter, there were no significant differences

of nitrogen levels on growth characters with exception of number of leaves plant -1,

while it was found to be highly significant on all yield characters. The effect of

interaction between varieties and Nitrogen levels were no significant for all growth

characters, yield and yield components continue.

The highest percentage of oil represented in the variety (Flame) under the treatment of

control.

Statistics