World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
Abstract
The study assessed the effect of varying light intensities and optimum
percentage of sunlight favourable for raising Tetrapleura tetraptera
seedlings. The light intensity was measured through photometer. The
experiment was subjected to a control without wire mesh(T1) and three
other treatments (T2, T3 and T4) covered with different layers of black
wire mesh with 99.5%, 75%, 49.8% and 25% light intensities
respectively. Each of the treatments was replicated six times in a
completely randomized design. The plant height, leaf production and
stem diameter were all monitored for 12 weeks. Analysis of Variance
(ANOVA) was employed and the means separated using Least Significant
Difference (LSD). The results showed that the significance effect (P =
\u3b10.05) was only observed in the seedlings height of
Tetrapleuratetrapteraseedlings. However, the mean values obtained for
all the parameters considered revealed the treatment 1(i.e. 99.8% wire
mesh) was observed to be the best performing treatment. For the plant
height, mean value ranged between 13.09 cm and 16.8 cm, a range from
0.22cm to 0.28mm was recorded for stem girth while the mean values
between 22 and 27 were obtained for number of leaves among the
treatments. It may be concluded from the study, that light intensity of
100% i.e without interference should be used for the growth and
development as well as production of Tetrapleura tetraptera seedlings
in the nursery
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