The Effect of Different Rates of Bio and nitrogen fertilization on some forage growth characteristics of Sorghum (Sorghum bicolor L.)

Abstract

The results showed that the treatments of Bio-fertilizer fertilization and Nitrogen fertilizer had a
significant effect on the characters studied, the treatments ( 2, 3 letters/ha) produced higher values of plant height
during 2008, and 2009 seasons, and leaves stem ratio, number of tillers /m2
, leave the area and stem diameter during
2009 season. The ( 1 letter/ha) treatment gave a higher value in the number of tillers /m2 during the 2008 season,
while the increase of Bio-fertilizer fertilization until ( 2 letters/ha) offered an increase in leaves no /plant, stem
diameter, leaves area during 2008 and 2009 seasons, and increase in leave stem ratio and tillers number per meter
square during 2008 season. There was a significant effect return to Nitrogen fertilizer treatments. The results
showed that the (150kg N/ha) exceeded plant height during the seasons of 2008 and 2009 and gave the higher value
in leave stem ratio, stem diameter, and tillers number per meter square during season 2009. The treatment (100 kg
N/ha) gave the highest mean in leaves number per plant during the 2008 and 2009 seasons, and exceeded in stem
diameter, leave stem ratio and tillers number per meter square and leave the area during the 2008 season. In
addition, the results showed the interaction between Biofertilizer fertilization and Nitrogen fertilizer on all
characters during the 2008 and 2009 seasons.