Thinning from below: effects on height of dominant trees and diameter distribution in eucalyptus stands

Medeiros R.A., . and Paiva H.N. de, . and Soares A.A.V., . and Cruz J.P. da, . and Leite H.G., . Thinning from below: effects on height of dominant trees and diameter distribution in eucalyptus stands. pp. 238-247. ISSN 0128-1283

This study aimed to evaluate the height and diameter growth of dominant trees in eucalypt plantations submitted to thinning from below. The thinning experiment was carried out in the north-east Bahia Brazil in sites with different productive capacities. The treatments corresponded to a reduction of 20 35 50 of stand basal area and an additional treatment of 35 removal plus pruning. We evaluated the growth in height before and after thinning the dominant height mean diameter ratio and the diameter distribution over time. There was no statistical difference in dominant height growth before and after thinning and neither between treatments which allowed for the use of a single equation to represent dominant height growth. The average diameter and distribution of individuals across the diameter classes on the other hand were influenced by thinning weight. Our study reinforces that site index as the mean dominant height at a reference age would be used even after the application of thinning given that dominant height was not affected by this silvicultural treatment.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v29n2/2...

Abstract

This study aimed to evaluate the height and diameter growth of dominant trees in eucalypt plantations submitted to thinning from below. The thinning experiment was carried out in the north-east Bahia Brazil in sites with different productive capacities. The treatments corresponded to a reduction of 20 35 50 of stand basal area and an additional treatment of 35 removal plus pruning. We evaluated the growth in height before and after thinning the dominant height mean diameter ratio and the diameter distribution over time. There was no statistical difference in dominant height growth before and after thinning and neither between treatments which allowed for the use of a single equation to represent dominant height growth. The average diameter and distribution of individuals across the diameter classes on the other hand were influenced by thinning weight. Our study reinforces that site index as the mean dominant height at a reference age would be used even after the application of thinning given that dominant height was not affected by this silvicultural treatment.

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Item Type:	Article
AGROVOC Term:	Eucalyptus
AGROVOC Term:	Dominant species
AGROVOC Term:	Forest plantations
AGROVOC Term:	Forest trees
AGROVOC Term:	Forest thinning
AGROVOC Term:	Weight
AGROVOC Term:	Diameter
AGROVOC Term:	Distribution
AGROVOC Term:	Height classes (in forestry)
AGROVOC Term:	Experiments
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/22926

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