Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 68: 5356 - 5365 Published August 31, 2013.
Initial growth of Pterygota macrocarpa Schumann (Sterculiaceae) depending on the light intensity in Côte d'Ivoire
KOUADIO Kouassi, 1 N’GUESSAN Koffi, 2 KOUASSI Kouadio Henri, 1 ETTIEN Kouassi Bosson Rolande1Laboratoire de Botanique et de Biologie Végétale, UFR Biosciences, Université Félix HOUPHOUET BOIGNY Abidjan-Cocody, 22 BP 582 Abidjan 22 (Côte d’Ivoire). E-mail: attowoula@yahoo.fr Cél: (+225) 47 – 90 – 82 – 75 // 04 – 98 – 89 – 60, E-mail: nguessankoffifr@yahoo.fr,
2Laboratoire de Biologie Végétale et amélioration des plantes, Université LOUROUGNON GUEDE de Côte d’Ivoire BP 150 Daloa (Côte d’Ivoire). E-mail: atoumanikouadiokan@yahoo.fr
Original submitted in on 16th May 2013 Published online at www.m.elewa.org on 2nd September 2013.
ABSTRACT
Objective:
A study on the growth of Pterygota macrocarpa (Sterculiaceae), in the
nursery depending on the intensity of the light, was conducted within
the Forest Management Unit of Bossematié. The main objective is to seek
additional information on the initial growth of Pterygota macrocarpa ,
an overexploited and endangered species, for use in reforestation
programs of Ivorian forests.
Methodology and Results: The study is based on the determination of the dynamics of growth in height and diameter and leaf production of this species in environments with varied intensity of light. Three media gradual illumination intensity (low, medium, high), housing each nursery of Pterygota macrocarpa were installed and the various measurements were performed. The results showed that the average height of saplings in media of low light is statistically different from that obtained in highly sunny environment (F = 4.391, P = 0.0370). In contrast, the mean diameter and the mean of leafs production did not show a significant difference in these environments. Furthermore, the study showed that the initial growth of Pterygota macrocarpa is slow, like that of most tree species commonly exploited.
Keywords: Pterygota macrocarpa, vulnerable species, growing in the nursery, Bossematié, Côte d'Ivoire.Methodology and Results: The study is based on the determination of the dynamics of growth in height and diameter and leaf production of this species in environments with varied intensity of light. Three media gradual illumination intensity (low, medium, high), housing each nursery of Pterygota macrocarpa were installed and the various measurements were performed. The results showed that the average height of saplings in media of low light is statistically different from that obtained in highly sunny environment (F = 4.391, P = 0.0370). In contrast, the mean diameter and the mean of leafs production did not show a significant difference in these environments. Furthermore, the study showed that the initial growth of Pterygota macrocarpa is slow, like that of most tree species commonly exploited.
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