广西海岸白骨壤红树植物地上部生物量的相关分析

Correlation Analysis of Aboveground Biomass of Coastal Mangrove Avicennia marina in Guangxi

关键词:  红树林  白骨壤  地上部生物量  测树因子  相关分析

Key words:  mangroves  Avicennia marina  aboveground biomass  tree morphological parameter  correlation analysis

摘要:

1992年3月在广西北海半岛大冠沙白骨壤群落研究了白骨壤植株的测树因子跟地上部生物量间的相关性。结果显示,由于白骨壤植株形态多变,树高通常小于2.0m,树高在估算地上部生物量时并不重要。植株的生物量可较好地用下述方程估算:
茎:W=0.8496-0.4429D+0.0748D²
枝:W=-2.2744+1.5595e^-H+1.0590C+0.0606D²
叶:W=0.0180D^2.1294
地上部分生物量:W=-2.4386+0.0081H/LnH+1.4796C+0.0991D²式中H为树高(m),D为基茎(cm),C为冠幅(m²),W为干重(kg)。文中还给出了利用这些方程估算群落生物量的范例。

Abstract:

The correlation analysis between tree morphological parameters and aboveground biomass was studied in March 1992 for an Avicennia marina community at Daguansha of Beihai pennisula of Guangxi.The results show that tree height seems less important in estimating biomass because the tree morphology varies considerably,and the tree height is usually less than 2.0mm.The better equations used to estimate tree aboveground biomass should be:
stem:W=0.8496-0.4429D+0.0748D²
branch.W=-2.2744+1.5595e^-H+1.0590C+0.0606D²
leaf:W=0.0108D^2.1294
sum:W=-2.4386+0.0081H/In H+1.4796C+0.0991D²
and,H is tree height(m),D basal diameter(cm),C canopy area(m²) and W dry weight (kg).An example of application of these equations to estimate the biomass of a community is also offered.