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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730 EISSN: 1021-9730
Vol. 5, No. 3, 1997, pp. 267-272
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Bioline Code: cs97033
Full paper language: English
Document type: Research Article
Document available free of charge
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African Crop Science Journal, Vol. 5, No. 3, 1997, pp. 267-272
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Tarimo, J.P. Akwilin
Résumé
Deux experimentations ont ete menees pendant deux campagnes a
l'Universitede Queensland, Redland Bay Farm au Sud-est de Queensland, en
Australie afin d'identifier quelques determinants physiologiques de la
reaction de l'arachide a la densite de la population des plantes apres
l'anthese. La premire experience etait menee aux ecartements carres tandis
que la deuxieme etait menee aux ecartements rectangulaires. Les techniques
d'analyse des composants de rendement (YCA) etaitent utilisees pour etudier
le rendement et la reaction des composants de rendement en fonction de
niveaux differents de la densitede la population des plantes. Les resultats
ont demontre que la variation en rendement des graines m-2 parmi les
densites de la population des plantes etait associee aux reactions de
quelques composants reproductifs de rendement e.g. le rapport masse des
graines (KDM/Nk) - densite de la population des plantes. Par contre, les
reactions des composants vegetatifs ces densites-la avaient des effets
minimes en rapport avec les differences en rendement des graines dans leur
ensemble. On peut conclure que la technique de la division a double
dimension (TDP) de la technique de (YCA) pourvoit une methode efficace pour
identifier des determinants physiologiques et morphologiques de la
variation de rendement d'arachide en conditions de champ. De ces resultats,
on peut deduire que la variation dans la production des matieres seches des
graines etait liee la reaction des traitements de KDM/NK, Npg/A1; NPG,
NK/NP et NB/N.
Mots Clés
Arachis hypogaea L., matires seches des graines, densite de la population des plantes, division a double dimension, composants de rendement
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Physiological response of groundnut to plant population density
Tarimo, J.P. Akwilin
Abstract
Two experiments were carried out in two seasons at the University of
Queensland, Redland Bay Farm in Southeast Queensland, Australia to identify
some physiological determinants of groundnut response to plant population
density after anthesis. The first experiment was grown in square spacings
while the second one was grown in rectangular spacings. Yield componet
analysis (YCA) techniques were used to study the yield and yield component
responses to the different levels of plant population density. The results
show that variation in kernel yield m-2 among the plant population
densities was associated with responses of some reproductive yield
components, e.g. kernel mass (KDM/Nk) to the plant population densities. In
contrast, the responses of vegetative components to those densities had
little association with the overall kernel yield differences in this study.
It is concluded that the two-dimensional partitioning (TDP) technique of
YCA provides an effective method of identifying physiological and
morphological determinants of yield variation in groundnut under field
conditions. From the results, variation in kernel dry matter production was
associated with responses of KDM/NK, Npg/Al, NPG, NK/NP and NB/N to the
treatments.
Keywords
Arachis hypogaea L., lernel dry matter, plant population density, two-dimensional partitioning, yield components
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© Copyright 1997 - African Crop Science Society
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