Concomitant effect of boron molybdenum and nickel on physiological traits and nodulation of blackgram (Vigna mungo L. Hepper)

A field experiment was conducted on the concomitant effect of boron, molybdenum and nickel as basal physiological traits and nodulation of blackgram (Vigna mungo L. Hepper) at Agricultural college farm, Bapatla during rabi, 2017-18. It consisted of eight treatments of micronutrient application viz., control (T1), B (T2), Mo (T3), Ni (T4), B+Mo (T5), B+Ni (T6), Mo+Ni (T7) and B+Mo+Ni (T8) with randomized block design concept and replicated thrice. The results revealed that application of B, Mo and Ni individually and in combination increased the CGR and RGR. Increase in NAR was observed with T3 and T5 to T8. Increase in internal CO2 concentration and decrease in transpiration rate was obtained with all treatments T2 to T8, but stomatal conductance and photosynthetic rate responded positively with treatments T5 to T8. Nodule number and nodule weight plant-1 found increased with B, Mo and combination treatments T5 to T8.