摘要
探讨了广西英罗湾红海榄红树林重金属Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｃｒ元素的累积及动态。结果表明：植物体不同部位元素的含量范围，分别为Ｃｕ０．４３３～１．２１、Ｐｂ０．３６９～１．８８、Ｚｎ２．９４～７．６６、Ｃｄ０．０２０～０．２３３和Ｃｒ０．３３０～０．５６２ｕｇ／ｇ。林地残留物组分元素含量远高于植物体及凋落物组分含量。该群落Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｃｒ的现存储量，分别为２８．７３、２５．２５、１４３．６８、３．１４和１４．６１ｍｇ／ｍ２。林地残留物相应元素的储量，分别为２７１．６８、３２３．４１、１９８３．７０、８．１８和３４．４４ｕｇ／ｍ２。群落Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｃｒ元素的生物循环为：年吸收量分别为１３５１．７０、１６１３．１２、８８０８．３７、２４０．７４和７５９．３０μｇ／ｍ２；年存留量分别为８４２．４６、８０６．９１、４６９４．１０、９４．８８和４６４．８０μｇ／ｍ２；年归还量分别为５０９．２４、８０６．２１、４１１４．２７、１４５．８６和２９４．５０μｇ／ｍ２；周转期分别为５６、３１、３５、２２和５０年；流动系数Ｃｄ＞Ｐｈ、Ｚｎ＞Ｃｕ、Ｃｒ。
The accumulation and dynamic of heavy metal, Cu, Ph, Zn, Cd and Cr elements were studied in Rhizophora stylosa mangrove community at Yingluo Bay of Cuangxi, China. The results showed that: 1) In different parts of the plant the contents of the elements were: Cu 0.433～1.21, Pb 0.369～1.88, Zn 2.84～7.66, Cd 0.020～0.233 and Cr 0.330～0.562(ug/g). The contents of the elements in residues were much higher than those in the plant and litter fall.2)The pool amounts of the elements in standing crop of the community were:Cu 28.73, Pb 25.25, Zn 143.68, Cd 3.14 and Cr 14.61(mg/m2). The pool amounts of the elements in residues were: Cu 271.68, Pb 323.41, Zn 1983.70,Cd 8.18 and Cr 34.44(g/m2). 3) The biological cycles of the elements in the community were: Annual retention, Cu 1351.70, Pb 1613.12, Zn 8808.37, Cd 240.74 and Cr 759.30 (g/m2); Annual retention: Cu 843.46, Pb 806.921, Zn 4694.10, Cd 94.88 and Cr 464.80 (g/m2); Annual return Cu: 509.24, Pb 806.21, Zn 4114.27, Cd 145.86 and Cr 294.50 (g/m2). 4) the turnover period was: Cu 56, Pb 31, Zn 35, Cd 22 and Cr 50 (a). The flow coefficients were Cd>Pb and Zn>Cu and Cr.
出处
《植物生态学报》
CAS
CSCD
北大核心
1996年第1期20-27,共8页
Chinese Journal of Plant Ecology
基金
国家自然科学基金
关键词
红树林
红海榄
红树科
重金属元素
Mangrove, Rhizophora stylosa, Heavy metal element dynamic
