摘要
This paper reports the absorption,accumulation,distribution and cycle of Cu,Pb,Zn,Cr and Ni in S.apetala+S.caseolaris,mangrove community at Futian Mangrove Nature Reserve of Shenzhen,The Cu,Pb,Zn,Cr and Ni contents in forest soil increase from bottom to surface layers,and the storage of the five heavy metals in the surface layer(depth0-30cm)is Zn>Pb>Ni>Cr>Cu.The concentration ability is S.caseolaris>S.apetala>K.candel.The existing accumulation of Cu,Pb,Zn,Cr and Ni in the community is 23019.63μg/m^2,23429.66μg/m^2.177870.42μg/m^2,6835.80μg/m^2,and 12995.22μg/m^2,respectively.The annual absorption is 6592.57μg/m^2,2664.80μg/m^2,23123.56μg/m^2,853.24μg/m^2,and 1990.95μg/m^2,respectively.The annual return is 3179.50μg/m^2,1300.65μg/m^2,7401.31μg/m^2,398.99μg/m^2,and 646.20μg/m^2 respectively.The annual net retention accumulation of Cu,Pb,Zn,Cr and Ni in the community is 3413.07μg/m^2,1364.15μg/m^2,15722.25μg/m^2,454.25μg/m^2,and 1344.75μg/m^2,respectively,The turn over periods of Cu,Pb,Zn,Cr and Ni are 8,19,15,18and 21 years,respectively.
This paper reports the absorption, accumulation, distribution and cycle of Cu, Pb, Zn, Cr and Ni in S. apetala + S. caseolaris, mangrove community at Futian Mangrove Nature Reserve of Shenzhen. The Cu, Pb, Zn, Cr and Ni contents in forest soil increase from bottom to surface layers, and the storage of the five heavy metals in the surface layer (depth 0 ~ 30 cm) is Zn > Pb > Ni > Cr > Cu. The concentration ability is S. caseolaris > S. apetala > K. candel. The existing accumulation of Cu, Pb, Zn, Cr and Ni in the community μis 23 019.63g/m2μ, 23 429.66g/m2μ, 117 870.42g/m2μ, 6 835.80g/m2μ, and 12 995.22g/m2μ, respectively. The annual absorption is 6 592.57g/m2μ, 2 664.80g/m2μ, 23 123.56g/m2μ, 853.24g/m2μ, and 1 990.95g/m2, respectively. The annual return is μ3 179.50g/m2μ, 1 300.65g/m2μ, 7 401.31g/m2μ, 398.99g/m2μ, and 646.20g/m2, respectively. The annual net retention accumulation of Cu, Pb, Zn, Cr and Ni in the community is 3 413.07μg/m2, 1 364.15μ g/m2, 15 722.25μg/m2, 454.25μg/m2, and μ1 344.75g/m2, respectively. The turn over periods of Cu, Pb, Zn, Cr and Ni are 8,19,15,18 and 21 years, respectively.
