Data analysis
Excel was used for data processing and SPSS 17 for related statistical
analyses.
RESULTS
The effects on plant height
increments
Under different light intensities, the plant height increments of the
six plant species studied showed significant differences (P< 0.01; Figure 1). The K. obovata , A. marina ,
and R. stylosa seedlings had the largest plant height increment
under the G1 treatment and showed a gradually decreasing trend with
decreasing light intensity. The A. corniculatum , C. tagal ,
and B. sexangular seedlings had the largest plant height
increment under the G2 treatment; the height increments initially
increased and then decreased with decreasing light intensity. These
results indicate that too high or too low light intensity can inhibit
the increase of plant height.
Under different flooding times, the plant height increments among the
six mangrove species were significantly different (P <
0.01); all of the increments first increased and then decreased.
Specifically, the largest plant height increments of C. tagal andB. sexangular seedlings were observed under the T2 treatment,
while the other four species showed the largest plant height increments
under the T3 treatment.
Under different seawater salinities, the plant
height increments of the six mangrove
species were significantly different (P < 0.01). The
plant height increments of K. obovata , C. tagal , andB. sexangula seedlings showed a gradually decreasing trend, with
the largest increments under S1 treatment. The plant height increments
of A. marina , A. corniculatum , and R. stylosaseedlings first increased and then decreased, with the largest values
observed with the S2 treatment. These results indicate that too high or
too low seawater salinity can inhibit plant height increments of the
seedlings.