Variations in heartwood proportion and basic density between provenances of Eucalyptus grandis in Kenya

Langat D. K., . and Kariuki J. G., . Variations in heartwood proportion and basic density between provenances of Eucalyptus grandis in Kenya. pp. 179-186. ISSN 0128-1283

Eucalyptus grandis is one of the exotic tree species that have recmed wide attention in Kenya becauIe of its fast growth and multiple uses. In 1980 a provenance trial waa establilhed in Elburgon Kenya to assess its growth performance. The wood quality variation between these provenances is not known. Trees from each of the 18 provenances were selected at 16 years of age to investigate variations in heartwood proportion and basic density. The study indicated large variations between provenances or the two properties assessed. The average heartwood proportion ranged from 29.5 to 61.5. Heartwood proportion decreased with height with maximum at 1.3m and minimum at 12.0m. The average basic density ranged from 490.4 to 592.7 kg m.a. Baaic denaity decreased between 1.3 and 4.0 m height and thereafter increased slightly for most provenances except for south of Tyalgum northern New South Wales and south of Murwillumbah whose density increased with sampling height.

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Abstract

Eucalyptus grandis is one of the exotic tree species that have recmed wide attention in Kenya becauIe of its fast growth and multiple uses. In 1980 a provenance trial waa establilhed in Elburgon Kenya to assess its growth performance. The wood quality variation between these provenances is not known. Trees from each of the 18 provenances were selected at 16 years of age to investigate variations in heartwood proportion and basic density. The study indicated large variations between provenances or the two properties assessed. The average heartwood proportion ranged from 29.5 to 61.5. Heartwood proportion decreased with height with maximum at 1.3m and minimum at 12.0m. The average basic density ranged from 490.4 to 592.7 kg m.a. Baaic denaity decreased between 1.3 and 4.0 m height and thereafter increased slightly for most provenances except for south of Tyalgum northern New South Wales and south of Murwillumbah whose density increased with sampling height.

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Item Type:	Article
AGROVOC Term:	Heartwood
AGROVOC Term:	Density
AGROVOC Term:	Eucalyptus grandis
AGROVOC Term:	Wood properties
AGROVOC Term:	Growth rate
AGROVOC Term:	Provenance trials
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/22194

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