تاثير المسافات النباتية في بعض الصفات النوعية ودليل الحصاد لصنفين من زهرة الشمس(Helianthus annuus L.)

Abstract

ABSTRACT An experiment was carried out at agricultural research station/university of Basrarh during growing season of 1997 to investigate the effects of three plant spacing(35x70,25x70and15x70cm)on quality and harvest of two sunflower varieties.(Peredovick &Akmar). Results showed that number of filling seeds/head , fertility percentage increased significantly with increased plant spacing, while the percentage of pith and oil increased with narrow plant spacing. The effect of interaction between variety and plant spacing had a significant effect on all characteristics expect harvest index . Variety Peredovick gave a higher filling seeds , harvest index .oil and pith percentage than Akmar while Akmar gave a higher pith ana oil percentage whereas there was no significant differences between them in fertility percentage.