02286naa a2200181 a 450000100080000000500110000800800410001910000190006024500930007926000090017252018060018165000130198765000120200065000160201265000140202870000170204277300450205915671982003-10-06       2000    bl ---       0--  u    #d1 aMOREIRA, A. G.  aBiomass allocation and growth of tree seedlings from two contrasting Brazilian savannas.  c2000  aGrowth and biomass allocation to roots and shoots of ten native trees of two contrasting savanna communities in central Brazil (Cerrado), differing in woody species density, was studied for up to seven months after germination. We compared three closed savanna woodland species with four open savanna species. Three other species were common to both savanna types. Root/shoot rations different greatly among species but no similar pattern of biomass allocation to roots and shoots was found between species of the same savanna type. After seven months of growth the woodland species Alibertia edulis. Rich had a root/shoot ratio smaller than one and the open savanna species Kielmeyera coriaceae (Sp.). Mart. a ratio equal to nine; the remaining species had values ranging from one to six, irrespective of savanna type. Relative growth rate (RGR) of early stage woodland seedlings (30-day old seedlings) was significantly different from open savanna seedlings (range between 0.059 and 0.192 mg mg-1 day-1 for the woodland species, and between 0.025 and 0.035 mg mg-1 day-1 for the open savanna species; common species had values ranging from one to six, irrespective of savanna type. Relative growth rate (RGR) of early stage, woodland seedlings (30-day old seedlings) was significantly different from open savanna seedlings (range between 0.059 and 0.192 mg mg-1 day-1 for the woodlands species, and between 0.025 and 0.035 mg mg-1 day-1 for the open savanna species had intermidiate vallues). For older seedlings (150-day old seedlings) differences disappear (RGR ranging between 0.013 and 0.030 mg mg-1 day-1 espective of savanna type). The high values of root /shoot ratios and root elongation of most species is probaly related to their capacity to withstand the dry season and resprout are fire.  aBiomassa  aCerrado  aCrescimento  aPlântula1 aKLINK, C. A.  tEcotropicosgv. 13, n.1, p. 43-51, 2000.