Abstract:

Globally, interests to increase carbon stocks have gained momentum in both woody and non-woody
ecosystems. Despite efforts made to generate appropriate methods to estimate these stocks, most
equations developed do not cater for intraspecific variabilities across e.g. species, regions or growth
stages; especially in the case of bananas. Therefore, there is need to develop more robust equations to
improve on the precision of biomass-carbon prediction especially at local scales to facilitate estimation
of specific carbon stocks often lost in global assessments. This study aimed at developing cultivarspecific
biomass estimation relationships and determining carbon content of EAHB cultivars at two
growth stages. Plant data were collected purposively using destructive sampling techniques on
farmers’ plots for 4 cultivars (Kibuzi, Nakitembe, Enyeru and Nakinyika) in two agro-ecological zones:
the L. Victoria crescent and the South-western farmlands in the districts of Lwengo and Mbarara
respectively. Results show that biomass differed across cultivars (P<0.001); hence four equations
(Enyeru, Nakinyika, Kibuzi_Nakitembe and Generic) were developed following an exponential function,
y=Aexp(ax), using diameter at breast height (DBH) as the predictor variable with an R2 range of 82-94%.
EAHB mean carbon content varied significantly with growth stage (P<0.05) (47.6% for maiden plants
before flowering and 48.8% for mature plants with a developed bunch). This study concludes that it is
important to develop cultivar-specific equations for biomass-carbon estimation of EAHB cultivars to
help assess their contribution to the carbon cycle especially in future studies.