Duncan’s multiple range test was used
to determine the difference among means at the level of 0.05. After
multiple comparisons, the means in the following tables are followed
with different letters ‘‘a–e’’, based on their values and statistical
differences. Where a mean is followed with ‘‘ab’’, this mean isnot significantly different from a mean with ‘‘a’’, and is not significantly
different from another mean with ‘‘b’’. However, means
with same letter were not significantly different (P > 0.05).