Biomass Characteristics As A Measure Of Growth And Productivity Of (Rhizophora Racemosa Meyer) Grown In Amended Soil Types And Exposed To Saline Water
Volume 3 - Issue 7, July 2019 Edition
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Author(s)
Oji O. O., Akonye, L. A., Tanee, F.B.G.
Keywords
Mangrove, Total dry biomass, above ground biomass, relative growth rate.
Abstract
The mangrove Rhizophora racemosa species was selected to study the survival, growth and response of seedlings grown under two contrasting soil salinity for 12 weeks and later exposed to shoreline saline water for 8weeks. Matured propagules were grown for 12 weeks on mangrove and garden soil amended with saw dust (SD), rice husk (RH), NPK and RH+ SD+NPK combination treatments and exposed to shoreline saline water at the Botanical Garden of the University of Port Harcourt. Biomass accumulation characteristics such as total dry biomass, above ground biomass, below ground biomass, percentage water content and relative growth rate were determined at 12 weeks post-soil treatment and 8 weeks post-saline water treatment respectively. The result showed that Rhizophora racemosa propagules grown under high saline mangrove Soil (8,000 – 20000µS/cm) and high saline water (10,000 - 35,000ppm) were significantly lower at p<0.05 in terms of cumulative total dry biomass, mean above ground biomass, mean below ground biomass, mean percentage water content and mean relative growth rate when compared to those grown in low saline garden soil (<200 µS/cm). These results have demonstrated that raising mangrove nursery for reforestation purposes is ideal on a low saline substrate with amendments especially at its young age in other to achieve maximum growth and development.
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