Effect of manganese foliar application on growth and yield of three sunflower (helianthus annuus l.) Varieties

Abstract

A Field experiment was conducted in Ramadi city, Al-Anbar province in the spring season 2011 to evaluate the effect of three Manganese foliar application levels which were (0,20 and 30 mg.L-1) on growth and yield of three sunflower varieties (F.S, Flame and Euro Flore). Split plot experiment was carried out using RCBD experiment design with three replicate. Study results showed a significant difference in plant growth and yield. The level 30 mg.L-1 gave the highest average of plant leaf area (4446 cm2.plant-1), manganese absorption quantity (99.36 mg.kg-1), head diameter (13.76cm), seed yield (3.629 mega gr.h-1). While the level 20 mg.L- 1 was exceeded in plant height (171.53cm), stem diameter (1.371cm), The Euro Flore variety reached the highest average on all parameters except plant leaf area ,which exceeded in flame variety. The interaction effects between Manganese levels and sunflower varieties was significantly affected all studied parameters.