Abstract:
Faidherbia albida tree is important in feeding the livestock during dry seasons when livestock feed is
scarce among the people in the semi-arid regions. Despite this unique value of the tree, no models
have been developed for estimating its local leaf biomass production, thus hampering its resource
assessment and management planning. Hence this study was conducted to determine allometric
relationships between leaf biomass production from F. albida tree and its diameter at breast height,
tree height and crown diameter. Between January and March 2016, random sample of 20 trees
were partially harvested in Chepareria Division. Diameter at breast height, crown diameter and total
tree height were measured in the field. Sample weights of the leaves were determined then
extrapolated to the whole tree production and used as a basis for developing leaf biomass models.
Correlation regression analysis as provided in R-software was used to establish the relationship
between F. albida leaf biomass production and the measurable tree parameters. Nine models were fitted in the study and their suitability in predicting leaf biomass established. Comparison of different
models was based on: adjusted coefficient of determination (adj. R2
); significance of parameter
estimates when tested at the 5% probability level; homogeneity of residual variance and distribution
of the residuals; Standard Error of the Estimates (SEE). Among tested models, the study suggested
Leaf biomass, (kg) = 8.5 + 9.5DBH
