اثرات تلقيح نژادهاي بومي ريزوبيوم بر گره زايي ژنوتيپ هاي دسي و كابلي نخود (Cicer arietinum L.) تحت رژيم هاي مختلف رطوبتي در مرحله رشد رويشي

Effects of inoculation of Rhizobium native strains on nodulation of Kabuli and Dessi chickpea ( Cicer arietinum L.) genotypes in different moisture levels in vegetative stage.

In order to study the influence of inoculating two native rhizobium isolates on nodulation in Kabuli and Dessi chickpea( Cicer arietinum L.) genotypes in different soil moisture regimes, a greenhouse experiment was carried out as a completely randomized design in a factorial arrangement of treatments with three replications. Treatments included soil moisture levels, FC(Field capacity), 75%FC, 50%FC and 25%FC, variety, MCC876 and MCC180 from Dessi and Kabuli genotypes, (drought resistant and susceptible, respectively) and rhizobium inoculation, number 16 isolate, number 27 isolate and control (not inoculated). Among different moisture levels, inoculated isolates and different varieties, significant differences (p<0.01) were observed for all studied factors such as number of nodules, nodule dry weight, nodule specific weight, shoot and root biomass and chickpea shoot/root ratio. Number 16 isolate was more effective than number 27 in regard to nodulation status, while difference between number 27 isolate and control was not significant (p<0.01). Moreover, number of nodules and nodule dry weight was higher in resistant than susceptible variety, indicating less susceptibility of resistant varieties to dry conditions.