Effects of salinity on the growth of mangrove seedlings
2004
Basak, U. C. | Gupta, N. | Rautaray, S. | Das, P.
Growth analysis was done with mangrove trees, namely Bru{.;lliem gymnorrhiza, B. parviflora and CPll0PS lagal to study the t'stablishment of seedlings. Seedlings were grown for 120 days in a glasshouse in varied NaCI salinity regimes (0, 10, 15 and 20 ppt). Bruguiera gymnorrhiza thrived up to a maximum salinity of 15 ppt with highest biomass produced at 10 ppt. BrtlfJuiera IHlrviflora and C tagal. however, grew well up to 20 ppt NaCI salinity but with a reduced rate of growth. The relative growth rate in C. iagalincreased by more than 90% over the control at a salinityof 10 ppt, followed by 42% in B. ImrvijloTa and 32% in B. gymnorrhiw at 15 ppt. Growth analysis showed that both net assimilation rate and leaf area ratio accounted for differences in relative growth rate in all the species studied. BrugUlfffl g'pnnorrhiw was found most sensitive to high salinity compared with the other species. Depletioll of this species can be reduced by growing them in low salinity regimes for successful seedling establishment.
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