摘要
本文主要探讨了广西英罗湾64年生红海榄(Rhizophora stylosa)红树群落对Cl、Na的吸收分布和生物循环。结果表明:该群落现存生物量中.库存Cl、Na总量分别为349.39g/m^2和279.8 5g/m (g·Cl/g·Na=1.25,mol·Cl/mol.Na=0.81),其中地上部分别占60.4%和5 6.9%,地下部分别占39.6%和4 3.1%。群落Cl、Na的生物循环为:年吸收量分别为40.18g/m^2和26.56g/m^2;年存留量分别为11.40g/m^2和9.15g/m^2;年归还量分别为28.78g/m^2和17.41g/m ~2;循环系数分别为0.72和0.66。周转期Cl(12年)快于Na(16年)。群落对Cl、Na的富集率分别为2.18和1.8.
The present paper deals mainly with the absorption,distribution and biological cycle of Cl and Na in 64-year-old Rhizophora stylosa mangrove community in Yinluo Bay of Guangxi, China.The results showed that:(Ⅰ) In standing crop of the community,the pool amounts of Cl and Na were 349.39g.m^(-2) and 279.85g.m^(-2) (g.Cl/g.Na=1.25, mol.Cl/mol.Na=0.81) respec- tively;in which the aerial part and underground part held 211.00g.Cl.m,159.16 g.Na.m^(-2) and 138.39g.Cl.m^(-2),120.69g.Na.m^(-2) respectively.(2)The biological cycle of C1 and Na in the community were:annual uptake 41.18g.Cl.m^(-2),26.56g.Na.m^(-2);annual retention ll.40gr Cl.m^(-2); 9.15g.Na.m-2;annual retention 28.78g.C1.m-2,17.41g Na.m^(-2);and cycle coefficient Cl:0.72,Na:0.66.(3)The turnover period of Cl(12 yrs.) was faster than that of Na(16yrs.).The enrichment ratio of Cl and Na for the community were 2.18 and 1.80 respectively.
关键词
红树林
红海榄
氯钠动态
Mangrove
Rhizophora stylosa
Cl and Na dynamic
