Determination of aboveground biomass (AGB) is an important step in planning the protection and sustainable use of mangrove resources. In the present paper, allometric relationships for estimating AGB of different morphology mangrove trees on the basis of canopy diameter (CD) and tree height (H) were studied. By comparing of correlation between AGB and CD 2 *H, and of relative error rates between measurement value and simulation value within the three mangrove specie, results show that

more »

... equation, in the form of AGB=a(CD 2 *H) b , is very suitable for estimation of AGB of multi-stemmed mangrove trees such as Aegiceras corniculatum, and is not suitable for singlestemmed mangrove trees such as Kandelia candel, but may be applied to those mangrove trees between multistemmed and single-stemmed in morphology such as Avicennia marina.