Pine resin productivity at Sao hill forest plantation, Southern Tanzania
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Tanzania Journal of Forestry and Nature Conservation
Abstract
A study on resin productivity from Pinus patula
and P. elliottii was carried out at Sao Hill Forest
Plantation. Four and three compartments for
Pinus patula and P. elliottii, respectively
covering age between 5 and 25 years were
selected. In each compartment, three plots (12m
× 12m) were systematically established. All trees
in each plot were measured for diameter at breast
height (Dbh) and three trees (smallest, medium
and largest in diameter) measured for total height
and crown diameter. All trees in treatment plots
were tapped for resin. Weighing and re-wounding
of tapped trees was done after every ten days in
ten sessions. The findings show that annual resin
yield ranged from 0.56kg tree -1 to 1.32kg tree -1
and from 0.47kg tree -1 to 1.98kg tree -1 for P.
patula P. elliottii, respectively. The Dbh and
crown diameter were important predictors resin
production. Over 31% of annual resin production
was explained by stand level variables. It was
recommended that integration of resin tapping
into the current schemes of timber will improve
the contribution of the forest sector in economic
growth. Further, introduction of resin tapping
may be an attractive option for early income
generation while waiting trees to attain the
rotation age.
Description
Journal Article
Keywords
Resin productivity, trees, Pinus patula, Pinus elliottii