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Titre du document / Document title

15N-determined dinitrogen fixation capacity of common bean (Phaseolus vulgaris) cultivars under water stress

Auteur(s) / Author(s)

CASTELLANOS J. Z. (1) ; PENA-CABRIALES J. J. ; ACOSTA-GALLEGOS J. A. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Campo Experimental Bajío-INIFAP, Apartado Postal 112, 38000, Celaya, Gto., MEXIQUE

Résumé / Abstract

The effect of water stress on nitrogen fixation in seven common bean (Phaseolus vulgaris L.) genotypes was investigated in Celaya, Gto., Mexico, in 1991. Beans were grown under four moisture regimes: (1) well-irrigated, control, (2) with water stress during the vegetative stage, (3) with water stress during the reproductive stage and (4) with water stress during the whole growing cycle. Biological nitrogen fixation was measured by 15N-isotope dilution using sorghum as a reference crop. Nodulation and N2-fixation data showed genotypic differences in response to water stress. Under non-stressed conditions, cv. Bayocel fixed the most nitrogen (85 kg/ha) and cultivar Flor de Mayo Bajio the least (33 kg/ha). Under water stress at the reproductive stage, these cultivars fixed 9 and 6 kg N/ha, respectively. Water stress during the reproductive stage reduced nodulation by an average of 43 % with no recovery after rewatering. Water stress during the reproductive stage had a greater effect on N2-fixation than on grain yield; in comparison to the control, N2-fixation was reduced to one sixth while grain yield was only reduced by 50 %.

Revue / Journal Title

Journal of Agricultural Science    ISSN  0021-8596   CODEN JASIAB 

Source / Source

1996, vol. 126 (3), pp. 327-333 (1 p.1/4)

Langue / Language

Anglais

Editeur / Publisher

Cambridge University Press, Cambridge, ROYAUME-UNI  (1905) (Revue)

Mots-clés anglais / English Keywords

Field experiment

;

Cultivar

;

Water deficit

;

Water regime

;

Isotope labelling

;

Nitrogen fixation

;

Biological fixation

;

Nodulation

;

Phaseolus vulgaris

;

Nitrogen Molecules

;

Mexico

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Central America

;

America

;

Environmental factor

;

Grain legume

;

Tropical crop

;

Nitrogen Isotopes

;

Tropical zone

;

Mots-clés français / French Keywords

Essai en champ

;

Cultivar

;

Déficit hydrique

;

Régime hydrique

;

Marquage isotopique

;

Fixation azote

;

Fixation biologique

;

Nodulation

;

Phaseolus vulgaris

;

Azote Molécule

;

Mexique

;

Azote 15

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Amérique Centrale

;

Amérique

;

Facteur milieu

;

Légumineuse grain

;

Culture tropicale

;

Azote Isotope

;

Zone tropicale

;

Mots-clés espagnols / Spanish Keywords

Ensayo en campo

;

Cultivar

;

Deficiencia agua

;

Régimen hídrico

;

Marcación isotópica

;

Fijación nitrogeno

;

Fijación biológica

;

Nodulación

;

Phaseolus vulgaris

;

Nitrógeno Molécula

;

México

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

America central

;

America

;

Factor medio

;

Leguminosa grano

;

Cultivo tropical

;

Nitrógeno Isótopo

;

Zona tropical

;

Localisation / Location

INIST-CNRS, Cote INIST : 673, 35400004328317.0090

Nº notice refdoc (ud4) : 3077450



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