تأثير معدل البذار و السماد البوتاسي في نمو و حاصل الشعير

الملخص EN

A field experiment was conducted during the two winter seasons of 2009 - 2010 and 2010 - 2011 at the Experimental Field of Crop Science Dept/College of Agriculture-Abu Ghraib/University of Baghdad to determine the effect of seeding rate and potassium on growth and yield of barley IPA-99.

A split-plot design with four replications was used.

Rates of seeding occupied 100, 150 and 200 kg.

h-1 were the main plot.

Potassium sulphate rates 0,83, 166 and 249 kg k.h-1 were sub plot.

The rate of seeding 150 kg.ha-1 gave highest means of grain yield (6.25, 6.30 ton.ha-1) in both seasons, respectively.

While treatment of fertilizer 249 kg k.h-1 gave the highest biological yield (20.12 , 21.54 t.ha-1) in both seasons, respectively.

Interactions between the two factors caused significant effects.

The combination of seed rate 150 kg.ha-1 with 249 kg k.ha-1 gave the highest mean of grain yield (6.73, 6.69 t.ha-1) in both seasons, respectively.

While the combination of rate seeding 200 kg.ha-1 with 249 kg k.ha-1 gave highest mean for biological yield (24.65, 25.92 t.ha-1) in both seasons, respectively.

We recommend using the rate seeding 150 kg.ha-1 and potassium level 249 kg k.ha-1 for they gave highest means of grain yield.