Paulownia tomentosa (Thunb.) is a fast-growing tree species that was introduced in Nepal from China in 1994 and planted in the protected forest at the ICIMOD Knowledge Park at Godavari, Kathmandu. Allometric equations have not been developed for this species in Nepal and South Asia, nor has its wood specific density or stem volume been estimated or biomass or carbon stock measured. Thus, the 20-year-old plantation at the ICIMOD Knowledge Park was selected for destructive sampling, and allometric equations were developed for measuring biomass and carbon stock in the above and below ground tree components of this fast-growing exotic species. This research report explains the comprehensive methods for developing the new allometric models, which could be used to estimate the biomass stock of P. tomentosa in similar physiographic and climatic zones of Nepal. It also sets out the results of applying these methods to P. tomentosa in the study sites at the ICIMOD Knowledge Park.
