Genetic variation in dry matter production, water use efficiency and survival under drought in four Acacia species studied in Baringo, Kenya

Soil erosion, land degradation and social transition. Geoecological analysis of a semi-arid tropical region, Kenya

Auteurs :
KIREGER, E.K.
BLAKE, T.J.
BRYAN, R.B.

Description :
Total dry matter productivity, transpiration rate and their ratio, called water use efficiency, WUE, of 6-month-old potted seedlings of 4 dryland Acacia species were compared under irrigation in Baringo. Genetic variation in water use was measured by lysimetry and compared with productivity and survival to determine the ecophysiological basis of variation. Evidence is presented correlating dry matter productivity with dehydration avoidance ability due to low conductance to water vapour, enhanced root growth and the ability to control leaf area development.


Type de document :
Article de monographie

Source :
Catena Verlag: Advances in geoecology, 1994, n°. 27, p. 195-204, Collation : Illustration, Références bibliographiques : 18 ref.

Date :
1994

Identifiants :
isbn : 3-923881-36-0

Editeur :
Pays édition : Allemagne