Allometric Relationships for Biomass and Carbon Estimaton of Neem (Azadirachta indica A. Juss) Plantations in Dryland of Hyderabad, Telangana

Abstract

The present study was conducted in Central Research Insttute for Dryland Agriculture (CRIDA), Hyderabad to develop the allometric equatons for predictng the total biomass and carbon of Azadirachta indica in three diferent basal diameter classes (0-10 cm, 10-20 cm and 20-30 cm). The growth variables viz., tree height, basal diameter, DBH, crown height and crown width are maximum for neem under higher diameter class, whereas minimum under lower diameter class. The average total biomass of neem tree was recorded as 122.3 kg/tree and 338.8 t/ ha in all three diameter classes. The allometric relatonship between the variables in Azadirachta indica was highly signifcant with positve and high correlaton. The highest and signifcant linear relatonship was observed in tree height (0.992) followed by crown height (0.963) with above ground biomass. With below ground biomass, a strong and highly signifcant relatonship was observed in tree height (0.988) followed by crown height (0.974) and DBH (0.967). The above ground variables (tree height, basal diameter, DBH, crown height and crown width) had highly signifcant linear relatonship with predicted variable of total biomass. The highest and strongest coefcient observed between total carbon and tree height (0.991) followed by crown height (0.968) and DBH (0.957). And also, the signifcant relatonship was found between the dependent variable (total carbon) and other independent variables viz., basal diameter (0.821), and crown width (0.910). Therefore, the result of this study may be useful to predict the amount of total carbon and biomass stored in Azadirachta indica plantaton on area basis.