Growth periodicity and formation of wood of some tree species of semideciduous seasonal forest in the southeast region of the state of São Paulo. / Periodicidade do crescimento e formação da madeira de algumas espécies arbóreas de florestas estacionais semidecíduas da região sudeste do estado de São Paulo.

AUTOR(ES)

Ligia Ferreira

DATA DE PUBLICAÇÃO

2002

RESUMO

The dendrocronology and dendroclimatology studies are now being used in the tropical and subtropical Brazilian forest. These studies are important to correlate the growth rate of forest species with climatic conditions and phenological behaviour to determine the age of the trees. This way, this investigation had as main objectives: (i) study the cambial periodicity activity and the tree-ring formation by using the dendrometer bands method in three areas in the Southeast region of the state of São Paulo; (ii) determine the age of some selected trees species (dendrocronology); (iii) correlate the girth increment of the trees with climatic conditions and phenological behaviour and growth condition (dendroclimatology and dendroecology); (iv) to identify macroscopically the wood of these species. For this investigation were chosen the following reserves: Ibicatu Ecological Station - (Piracicaba/SP) and Santa Genebra Forest Reserve (Campinas/SP) with indigenous growing in natural conditions and Tupi Experimental Station (Piracicaba/SP) plantations of native species with known age. Through the results obtained, it was verified that (a) the local where the specie is developed and its growth condition can interfere in growth rhythm of the trees; (b) the dendrometer bands in the trunk of the trees is a fundamental equipment, accuracy and very efficient tool for measuring girth increment of the trunk of the forest tree species; (c) the climatic variation as, precipitation and temperature, and the phenological behavior of the species are closely correlated with the girth increment of the trunk of the trees; (d) dendrocronological method is fundamental and accurate to determine the age of the tree, and; (e) there is no espressive difference between the macroscopical wood structure of the tress species studied and that one cited in literature.

ASSUNTO(S)

dendrologia árvores florestais forest products dendrology dendrometry produtos florestais tree species madeira dendrometria wood

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