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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 1, No. 1, 1993, pp. 25-29
Bioline Code: cs93004
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 1, No. 1, 1993, pp. 25-29

 en Response of some Nitrogen Fixing Tree Seedlings to Rhizobium check for this species in other resources Cross-Inoculation
Bekunda, M.A

Abstract

Six introduced and one native nitrogen fixing tree species were grown in a potted non-sterilized Inceptisol inoculated with: species-specific rhizobia strains; Rhizobium check for this species in other resources strain TAL 1145, a leucaena isolate; Bradyrhizobium japonicum check for this species in other resources strain TAL 169, and without inoculation. Twelve weeks later, significant species differences in dry matter yield, total N yield and nitrogen derived from the atmosphere (Ndfa) were obtained. Unlike earlier reports, Acacia albido and Acacia Senegal were better N2 fixers than Leucaena leucocephala check for this species in other resources . Two species did not respond to any of the inoculation treatments and none responded to inoculation with TAL 169. In species belonging to one cross-inoculation group, TAL 1145 had similar Ndfa values as those of species-specific rhizobia, implying that it is sufficient as the inoculum for this group.

Keywords
Cross-inoculation, Rhizobium strains, reference crop, isotope dilution

 
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