Effect of long-term salinity on the growth and biomass of two non-secretors mangrove plants Rhizophora apiculata and Ceriops tagal

International Conference on Agriculture, Environment, and Food Security

农业科学;生态环境科学

Basyuni, M.^1 ; Nuryawan, A.^1 ; Yunasfi^1 ; Putri, L.A.P.^2 ; Baba, S.^3

Department of Forestry, Faculty of Forestry, Universitas Sumatera Utara, Jl. Tri Dharma Ujung No. 1, Medan, North Sumatera

20155, Indonesia^1

Department of Agrotechnology, Faculty of Agriculture, Universitas Sumatera Utara, Medan, North Sumatera

20155, Indonesia^2

International Society for Mangrove Ecosystems (ISME), Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa

903-0213, Japan^3

关键词: Mangrove rehabilitations;    Morphological characters;    Optimal salinity;    Salt concentration;    Salt tolerant;    Salt treatments;    Sumatra , Indonesia;    Wet and dry;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/122/1/012042/pdf
DOI  :  10.1088/1755-1315/122/1/012042

来源: IOP

【 摘 要 】

The present study describes the effect of long-term salinity on morphological character and biomass content of two non-secretors mangrove plants Rhizophora apiculata and Ceriops tagal. Two mangrove seedlings were grown for six months in 0%, 0.5%, 1.5%, 2.0% and 3.0% salt concentration. The growth of R. apiculata was significantly enhanced by salt with maximal stimulus at 1.5% (equal to 50% natural seawater), and this increase appeared to be attenuated by increasing the salinity concentration above 1.5%. By contrast, the growth of C. tagal thrived up to 0.5% salt concentration. Our findings, therefore, suggested that within the range of treatments used, 1.5% and 0.5%, respectively were the optimal salinity of R. apiculata and C. tagal for growth. The highest leaf area of C. tagal was obtained at 1.5% salinity concentrations and, on the other hand, R. apiculata showed much greater extent. The wet and dry weight of the two seedlings was changed in the same manner as the height of plants upon salt treatment. Our results indicated that R. apiculata was more salt tolerant than C. tagal, which may provide valuable information for mangrove rehabilitation in North Sumatra, Indonesia.