Effectiveness of Rhizobium Leguminosarum Strains Nodulating Hairy Vetch, an Introduced Forage Legume in the Sandy Soils of Zimbabwe

Results from field experiments in Zimbabwe in 2009/10 - 2010 11 showed that nodulation of hairy vetch is erratic resulting in poor performance of the crop. The need to inoculate hairy vetch was therefore assessed using three (3) Rhizobium leguminosarum strains locally available in Zimbabwe’s strain bank. Strains MAR1504, MAR 833, MAR 346 were evaluated for their N fixing effectiveness under common acidic soi conditions and when limed to pH 6.5 (CaCl 2 scale). In the greenhouse, strains MAR 833 and MAR 1504 produced the highest biomass (at least 50% more dry mass as compared to the control). The findings suggest that hairy vetch productivity hence its contribution to soil N may be improved.
Les résultats des expériences sur le terrain au Zimbabwe en 2009/10-2010/11 ont montré que la nodulation de la vesce velue est erratique entraînant unefaible performance de la culture. La nécessité d’inoculation de la vesce velue a donc été évaluée en utilisant trois (3) souches de Rhizobium leguminosarum disponibles localement dans la banque de souches du Zimbabwe. Les souches MAR1504, MAR 833, MAR 346 ont été évaluées pour leur efficacité de fixation d’azote N sous les conditions communes des sols acides et quand elles sont chaulées au pH = 6,5 (échelle de CaCl2). Dans la serre, les souches MAR 833 et MAR 1504 ont produit la plus forte biomasse (au moins 50% de plus de biomasse sèche par rapport au témoin). Les résultats suggèrent que la productivité de la vesce velue, donc sa contribution à l’azote N dans le sol peut être améliorée.
Extended abstracts submitted under Integrated Crop Management
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Southern Africa
RUFORUM Conferences and Workshops
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The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under the theme of Integrated Crop Management