ROOT DISTRIBUTION OF PLANTED FOREST SPECIES IN MANAUS, AMAZONIA

ABSTRACT

The results of the roots systems architecture of two indigenous species (Carapa guianensis and Cedrelinga catenaeformis) and two exotic species ( Eucaliptus deglupta and Gmelina arborea) planted 60 km north from Manaus, Amazonia, are presented and dicussed. After soil scraping was measured lengh and diameter of roots and a draw of localization of each root in the soil. For others trees was colected all the roots with diameter bigger than 5 mm for dry weight determination. In the opposite of the others species G. arborea shows a system without pivotant in these plantations. The results indicate that some soil characteristics affect the root distribution and must be considered on land occupancy and planning of silvicultural systems of this region.

Key words
Root distribution; Carapa guianensis,Cedrelinga catenaeformis; Eucaliptus deglupta; Gmelina arborea