EFFICIENCY OF INOCULATION WITH INTRODUCE STRAINS OF STRAINS OF Bradyrhizobium japonicum AND Trichoderma harzianum ON SOYBEA GROWTH

Abstract

The study was conducted to evaluate the effect of three introduced isolates of Bradyrhizobium japonicum (J.3 , J.5 and J.43 ) and local isolate of Trichoderma harzianum (T.26) . and their combination in some soybean growth parameters . The results revealed that all bioagents induced significant increment in all studied growth parameters which included root size , bacterial nodules number , stem length ,stem radius , fresh weight of shoot and root system and dry weight shoot and root system but isolate J.5 ( B. Japonicum ) superior than isolate T.26 and their bacterial isolates ( T.3 and T.43 ) in most growth parameters . The results also reveled that the combination inoculation induced significant increment in most growth parameters as compared to control treatment , the treatment (J.43 and T.26 ) was superior than other combination treatments in increasing root system size , number of bacterial galls ,stem length ,stem radius ,fresh weight of shoot and root system and dry weight shoot and root system which recorded (2.3ml , 8nod./plant , 36cm , 2.4mm , 3.8g , 0.92g , 1.2g and 2.0g ) as compared to ( 0.9ml , 0.0 nod./plant ,11.0 cm , 0.17mm, 0.5g , 0.1g , 0.7g and 0.2g) in control treatment respectively .