Biochar-based Bradyrhizobium inoculum improves growth of lupin (Lupinus angustifolius L.) under drought stress
Egamberdieva, Dilfuza; Redding, Moritz; Wirth, Stephan
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.
Drought; Grain legumes; Hydrochar; Inoculation; Water scarcity
European Journal of Soil Biology
2017, Volume: 78, pages: 38-42
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