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Titre :
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Variation in transpirational water-use efficiency and root length development among wheat cultivars
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|
Auteurs :
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Q. Bai ;
T. Sinclair ;
J. Ray
|
|
Type de document :
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article/chapitre/communication
|
|
Année de publication :
|
1996
|
|
Format :
|
p. 14-19
|
|
Langues:
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= Anglais
|
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Catégories :
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AGRONOMIE
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Mots-clés:
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BLE
;
CROISSANCE VEGETALE
;
RACINE
;
UTILISATION DE L'EAU
;
EXPERIMENTATION
;
TRANSPIRATION
|
|
Résumé :
|
Wheat (Triticum aestivum L.) is commonly grown in regions that are subject to water-deficit conditions. To maximize yield potential, it is necessary to optimize use of the water that is received. Two plant traits that are important in this optimization are transpirational water-use efficiency (TUE) and depth of root development. These two traits were studied in greenhouse pat experiments involving ten diverse bread-wheat cultivars from northwest China representing differing years of release. Although most cultivars had statistically equivalent TUE, there were cultivars with superior TUE. No improvement in TUE with year of release was observed, Differences were also observed in the initial rate of increase in depth of rooting among the cultivars. Again, no clear bend was apparent for greater initial rate of rooting depth increase in more recently released cultivars. After the initial phase of root development, there were no statistical differences among cultivars in the rate of root development.
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Source :
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Soil and Crop Science Society of Florida Proceedings, vol.56
|
