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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 4, No. 2, 1996, pp. 159-166
Bioline Code: cs96053
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 4, No. 2, 1996, pp. 159-166

 en Water Stress Effects on Plantain (MUSA sp. aab) Suckers Grown Under Varying Nitrogen and Watering Regimes
Baiyeri, K.P.

Abstract

Plantain suckers (Musa sp.) raised under four nitrogen rates
(0, 100, 200 and 300 kg ha-1) and three watering intervals
(6, 9, 12 days) were subjected to water stress in a glasshouse
experiment.  Nitrogen rates did not significantly affect
growth before water stress.  After water stress induction,
suckers grown with 300 kg ha-1 produced more
photosynthetically active leaves, larger leaf area and thicker
pseudostems. Nitrogen at 200 kg ha-1 resulted in highest
total dry matter accumulation while 100 kg ha-1 favoured more
root development.  Frequently watered plants (6-day interval)
initially produced more leaves which were not sustained during
the water stress, but  the 9-day watering intervald higher
total number of leaves and taller suckers after water stress. 
Suckers watered at 12-day intervalid higher leaf nitrogen
content and leaf dry matter than other watering regimes.  A
positive relationship between dry matter production and
nitrogen rates after water stress was observed.  Suckers
raised with 200 kg ha-1 and watered at 9-day interval were
more vigorous and tolerant to water stress. This combination
is recommended as a practice for raising plantain suckers in
areas where  dry seasons are unavoidable after field
establishement.

Keywords
Assimilate partitioning, fertilizer effect, growth responses, stress tolerance

 
 fr
Baiyeri, K.P.

Résumé

Les rejets de plantain (Musa sp.) eleves sous 4 nivaux d'azote
(0, 100, 200 et 300 kg de N/ha) et 3 intervalles d'eau (6,9,12
jours) etaient soumis au stress d'eau sous serre experimentale
vitree. Les taux d'azote n'ont pas significativement affecte
la croissance avant le stress en eau. Apres l'induction du
stress d'eau, les rejets plantes avec 300 kg de N/ha
produisaient de feuilles plus larges et plus actives
photosynthetiquement et des pseudotroncs plus epais. 200 kg de
N/ha permettaient l'accumulation de la plus grande quantite de
matiere seche alors que 100 kg de N/ha favorisait le
developpement des racines.  Les intervalles d'eau de 6 jours
produisaient au debut plus de feuilles qui n'etaient plus
soutenues durant le stress d'eau, mais 9 jours d'intervalles
d'eau produisaient le nombre total des feuilles le plus eleve
et des rejetons plus grands apres les stress d'eau. Les
rejetons arroses tous les 12 jours d'intervalle avaient des
feuilles avec le niveau d'et de matiere seche le plus eleve
que les autres regimes d'arrosage. Un rapport positif entre la
production de matiere seche et le taux d'apres le stress d'eau
etait observe. Les rejets eleves avec 200 kg de N/ha et
arroses tous les 9 jours d'intervalle etaient plus vigoureux
et tolerant au stress d'eau. Cette combinaison etait
recommandee comme une pratique de dressage de rejetons de
plantain le ou les saisons seches sont inevitables apres leur
etablissement au champ.

Mots Clés
Repartition d'assimilates, effet d'engrais, reponses a la croissance, tolerance au stress

 
© Copyright 1996 - African Crop Science Society

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