Abstract:
Allometric models for estimating carbon under small holder forests differ depending on
tree species, site, and tree components. The study was carried out to develop specific
allometric models and quantify the aboveground carbon stocks for Pinus patula and
Eucalyptus saligna in Mbozi and Mufindi Districts. The results showed that allometric
models that use DBH as the,predictor variable were the best in predicting aboveground
carbon stock for tree components in smallholder forests. Using the component model the
carbon density for Eucalyptus saligna in Mbozi amounts to 23.50 t C ha-1 and in Mufindi
it was 41.34 t ha-1. Pinus patula in Mbozi had carbon density amounting to 49.43 t C ha-1
while it was 36.96 t C ha-1 in Mufindi. These amounts translate into 86.25 t ha-1 of C02e
in Eucalyptus saligna stands in Mbozi and 151.72 t ha-1 in Mufindi. Further, Pinus patula
stands stored 181.41 t ha-1 and 135.64 t ha-1 of C02e in Mbozi and Mufindi respectively.
By using total tree model the-carbon density for Eucalyptus saligna in Mbozi amounts to
2.36 t C ha-1 and 10.29 t ha-1 in Mufindi. Pinus patula in Mbozi had 45.05 t C ha-1 while
in Mufindi it was 33.96 t C ha-1
• The amounts translate into 8.67 t ha-1 of C02e in
Eucalyptus saligna in Mbozi and 37.76 in Mufindi. On the other hand Pinus patula had
165.32 and 124.63 t ha-1 of C02e in Mbozi and Mufindi respectively. It is apparent that
there is a high potential for climate change mitigation through carbon accumulation under
smallholder forestry.
