Viability of liquid medium-inoculation of Rhizobium etli in planting furrows with common bean

Viabilidade da inoculação líquida com Rhizobium etli no sulco de semeadura do feijoeiro-comum

The objective of this work was to evaluate the viability of liquid medium inoculation of Rhizobium etli in the planting furrow and to certify the efficiency of its strain UFLA 02-100 as a potential inoculant for common bean (Phaseolus vulgaris). The treatments consisted of three application rates of liquid inoculant applied in the planting furrows or in common bean seed, besides two controls without inoculation. The inoculant contained 10⁹ cells of Rhizobium etli mL^-1. Regardless of the application method, the yield obtained with the inoculation was equivalent to that of N from urea; however, the application in the furrows, at 0.6 L ha^-1, is more advantageous due to the operational practicality and reduced costs.

Index terms:
Phaseolus vulgaris; biological N₂ fixation; biotechnology