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RHIZOBIAL INOCULATION AND P FERTILIZATION RESPONSE IN COMMON BEAN (PHASEOLUS VULGARIS) UNDER GLASSHOUSE AND FIELD CONDITIONS

Published online by Cambridge University Press:  22 January 2007

M. ZAMAN-ALLAH ,
B. SIFI ,
B. L'TAIEF ,
M. H. EL AOUNI  and
J. J. DREVON
M. ZAMAN-ALLAH
Affiliation:
Programme des Légumineuses à graines, Laboratoire des Grandes Cultures, Institut National de la Recherche Agronomique de Tunisie, rue Hédi Karray, 2080 Ariana, Tunisia Département de Biologie – Université 7 Novembre-Carthage – Faculté des Sciences de Bizerte 7021 Zarzouna, Tunisia
B. SIFI
Affiliation:
Programme des Légumineuses à graines, Laboratoire des Grandes Cultures, Institut National de la Recherche Agronomique de Tunisie, rue Hédi Karray, 2080 Ariana, Tunisia
B. L'TAIEF
Affiliation:
Département de Biologie – Université de Tunis El Manar – Faculté des Sciences Tunis, Tunisia
M. H. EL AOUNI
Affiliation:
Département de Biologie – Université 7 Novembre-Carthage – Faculté des Sciences de Bizerte 7021 Zarzouna, Tunisia
J. J. DREVON
Affiliation:
UMR Rhizosphère and Symbiose – Institut National de la Recherche Agronomique Montpellier, France
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Abstract

Osmotic constraints, nutrient deficiencies, especially phosphorus, and the lack of efficient strains of rhizobia in Mediterranean soils are major factors limiting symbiotic nitrogen fixation and yield in common bean (Phaseolus vulgaris). In order to improve yields, we investigated responses to rhizobial inoculation and P fertilization under glasshouse and field conditions with two bean cultivars, Coco blanc and BAT477. The nodulation test, using a hydroponic system in a glasshouse, revealed strong variability among 22 rhizobium strains of various origins, in their symbiotic efficiency, compared with Rhizobium tropici CIAT899. The introduced strains proved to be more efficient although some local rhizobia revealed high potential efficiencies. Glasshouse trials showed a significant effect of inoculation and P supply on nodulation, N content and shoot dry weight that varied with rhizobial strain. Field trials substantiated the glasshouse observations and emphasized the effects of cultivar-rhizobia interactions on symbiotic parameters and yields. It is concluded that inoculation with suitable rhizobia with supply of additional P is a technology that may improve symbiotic nitrogen fixation and yield in common bean in some soils under a Mediterranean climate.

Type
Research Article
Information
Experimental Agriculture , Volume 43 , Issue 1 , January 2007 , pp. 67 - 77
Copyright
© 2006 Cambridge University Press

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