Abstract

Drought stress has a major abiotic impact on the symbiotic performance of legumes, inhibiting plant growth and nodulation. We evaluated the potential use of biochar as a carrier for Bradyrhizobium sp. inoculants as provided for lupin (Lupinus angustifolius L), and to determine the response of lupin to the biochar-based lnocula of Bradyrhizobium sp. (BR) in pot experiments, under irrigated and drought conditions. The survival of BR populations was higher in HTC-char carrier material than it was in pyrolysis biochar from maize (MBC) and pyrolysis biochar from wood (WBC). An HTC-based Bradyrhizobium sp. inoculant (HTC-BR) significantly enhanced plant growth, N and P uptake, and lupin nodulation under drought conditions in comparison with BR strain inoculation. BR was more likely to survive under drought stress conditions when introduced as HTC-based inocula in comparison with direct inoculation. Overall, this experiment indicates that a HTC-based formulation of Bradyrhizobium sp. is an effective inoculum carrier providing a promising and practical approach for improving growth and symbiotic performance of lupin under stress conditions. (C) 2016 Elsevier Masson SAS. All rights reserved.

Keywords

Drought; Grain legumes; Hydrochar; Inoculation; Water scarcity

Published in

European Journal of Soil Biology
2017, Volume: 78, pages: 38-42

UKÄ Subject classification

Agricultural Science


Publication identifier

DOI: https://doi.org/10.1016/j.ejsobi.2016.11.007

Permanent link to this page (URI)

https://res.slu.se/id/publ/84967