CAMBIAL ACTIVITY OF "DIPTEROCARPUS COSTULATUS" IN RELATION TO DIFFERENT STEM DIAMETERS AND CLIMATE FACTORS

CAMBIAL ACTIVITY OF "DIPTEROCARPUS COSTULATUS" IN RELATION TO DIFFERENT STEM DIAMETERS AND CLIMATE FACTORS

This study investigated the seasonal cambial activity in Dipterocrpus costulatus trees with different range of stem diameter at breast height (dbh). Samples from main stem of D. costulatus with dbh < 15 cm and > 25 cm growing in natural lowland dipterocarp rainforest of west Peninsular Malaysi...

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Veröffentlicht in:Journal of tropical forest science 2014-10, Vol.26 (4), p.581-588
Hauptverfasser: Wang, KH, Azim, AA Abdul, Sahri, MH
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Forest growth
Forest reserves
Forest trees
Forestry
Rain
Tree growth
Trees
Tropical climates
Tropical forests
Tropical rain forests
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Azim, AA Abdul
Sahri, MH
description This study investigated the seasonal cambial activity in Dipterocrpus costulatus trees with different range of stem diameter at breast height (dbh). Samples from main stem of D. costulatus with dbh < 15 cm and > 25 cm growing in natural lowland dipterocarp rainforest of west Peninsular Malaysia were collected for this purpose. Collections of cambial samples were carried out in 2-month intervals from August 2010 till June 2011. Cambial activity was determined by counting the numbers of cambial and expansion zone cell layers towards the outer sapwood. A greater number of cell layers indicated greater cambial activity. Results showed that the cambium of trees with dbh < 15 cm were influenced by the amount of rainfall. However, cambium of trees with dbh > 25 cm showed relatively less sensitivity to rainfall. Dipterocrpus costulatus showed active and inactive phases during the observation period. Thus, this study has proven that this species did not grow continually at the same rate in natural forests. Instead it showed periods of alternate active and inactive growth.
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Samples from main stem of D. costulatus with dbh &lt; 15 cm and &gt; 25 cm growing in natural lowland dipterocarp rainforest of west Peninsular Malaysia were collected for this purpose. Collections of cambial samples were carried out in 2-month intervals from August 2010 till June 2011. Cambial activity was determined by counting the numbers of cambial and expansion zone cell layers towards the outer sapwood. A greater number of cell layers indicated greater cambial activity. Results showed that the cambium of trees with dbh &lt; 15 cm were influenced by the amount of rainfall. However, cambium of trees with dbh &gt; 25 cm showed relatively less sensitivity to rainfall. Dipterocrpus costulatus showed active and inactive phases during the observation period. Thus, this study has proven that this species did not grow continually at the same rate in natural forests. 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source EZB-FREE-00999 freely available EZB journals; JSTOR
subjects Forest growth
Forest reserves
Forest trees
Forestry
Rain
Tree growth
Trees
Tropical climates
Tropical forests
Tropical rain forests
title CAMBIAL ACTIVITY OF "DIPTEROCARPUS COSTULATUS" IN RELATION TO DIFFERENT STEM DIAMETERS AND CLIMATE FACTORS
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