Effect of Gibberellic Acid (GA3) and Potassium Fertilizer in percentage of grain protein to two varieties from Barley Hordium valgare L.

Abstract

Tow experiments were carried out to examine the application of GA3 and potassium fertilizer ( K2SO4 ) to increase percentage of grain protein of two varieties from barley Hordium valgare L. ( IPA 99 and 9-12 ) . The experiments were conducted during the winter seasons of 2004- 2005 and 2005- 2006 at the experimental farm / Diyala Agriculture Directorate . A split plot design was used in each experiment . Result obtained from biological interactions study showed that combination of IPA 99 variety led to lowest weed densities with compact to 12-9 genotype . and combination of GA3 with 12-9 genotype led to gained highest percentage of protein which were 11.4 and 11.6 % and lowest percentage of carbohydrate which were 68.94 and 71.55 % to first and second experiments respectively .