Abstract
Six months after planting, seedlings of the leguminous treeDalbergia nigra, known as Brazilian rosewood, wereinoculated with a selected Bradyrhizobium strainBHICB-DN 15,either alone or in combination with mycorrhizal fungi to determine their effecton the growth of D. nigra in Atlantic forest andeucalyptussoils. Height growth of D. nigra was similar in both soilsand six months after inoculation Bradyrhizobium did notaffect the D. nigra height growth, but it did improve drymass and especially in the nitrogen content of plants grown in eucalyptus soil.The success of the delayed inoculation with BHICB-DN 15 confirms its competitiveability “vis-a-vis” indigenous soil rhizobia. Co-inoculationof BHICB-DN 15 and mycorrhizal fungi did not increase plant dry weight,nitrogenand phosphorus content or mycorrhizal colonization. These results suggest thatthe BHICB-DN 15 strain had no synergistic relationship with the mycorrhizalfungi or that there was incompatibility between symbionts, in both soils.
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