Artificial flowering in Triplochiton scleroxylon

Djagbletey G. D., . and Ofori D. A., . and Cobinnah J. R., . Artificial flowering in Triplochiton scleroxylon. pp. 152-158. ISSN 0128-1283

Triplochiton scleroxylon is an important indigenous tropical hardwood species in West Africa. Due to its erratic flowering cycles seeds are not readily available on a year to year basis posing considerable difficulty in plantation establishment. To ensure abundance and continuous supply of planting stock various treatments to induce flowering on grafts and mature trees were tested. These included spraying of urea solution on leaves bark ringing and soil drenching with 2 4-dichlorophenoxyacetic acid solution. The studies were carried out in two agroecological zones in Ghana namely the dry and moist semi-deciduous ecozones. In the dry semi- deciduous ecozone fruiting occurred from November“December 2005 in girdled (80) and ungirdled (30) trees whereas in the moist semi-deciduous ecozone there was less fruiting i.e. girdled (40) and ungirdled(0) trees in the same period. In all plants (30) the region within 10 cm above and below the girdles were swollen four months after girdling. Soluble carbohydrate concentrations in the bark before flowering were higher above the girdle (8.5) than below (6.0). Leaf shedding and bud development were greatest in treatments with 50 37.5 and 25 urea compared with 12.5 and 0 urea. The results suggest that T. scleroxylon can be artificially induced to flower.

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Abstract

Triplochiton scleroxylon is an important indigenous tropical hardwood species in West Africa. Due to its erratic flowering cycles seeds are not readily available on a year to year basis posing considerable difficulty in plantation establishment. To ensure abundance and continuous supply of planting stock various treatments to induce flowering on grafts and mature trees were tested. These included spraying of urea solution on leaves bark ringing and soil drenching with 2 4-dichlorophenoxyacetic acid solution. The studies were carried out in two agroecological zones in Ghana namely the dry and moist semi-deciduous ecozones. In the dry semi- deciduous ecozone fruiting occurred from November“December 2005 in girdled (80) and ungirdled (30) trees whereas in the moist semi-deciduous ecozone there was less fruiting i.e. girdled (40) and ungirdled(0) trees in the same period. In all plants (30) the region within 10 cm above and below the girdles were swollen four months after girdling. Soluble carbohydrate concentrations in the bark before flowering were higher above the girdle (8.5) than below (6.0). Leaf shedding and bud development were greatest in treatments with 50 37.5 and 25 urea compared with 12.5 and 0 urea. The results suggest that T. scleroxylon can be artificially induced to flower.

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Item Type:	Article
AGROVOC Term:	Triplochiton scleroxylon
AGROVOC Term:	Hardwood
AGROVOC Term:	Flowering
AGROVOC Term:	Plantations
AGROVOC Term:	Soil
AGROVOC Term:	Fruiting
AGROVOC Term:	Defoliation
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:26
URI:	http://webagris.upm.edu.my/id/eprint/21293

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