TY - JOUR
T1 - Determination of biomass accumulation in mixed belts of Salix, Corylus and Alnus species in combined food and energy production system
AU - Ghaley, Bhim Bahadur
AU - Porter, John Roy
PY - 2014/4
Y1 - 2014/4
N2 - Given the energetic, demographic and the climatic challenges faced today, we designed a combined food and energy (CFE) production system integrating food, fodder and mixed belts of Salix, Alnus and Corylus sp. as bioenergy belts. The objective was to assess the shoot dry weight-stem diameter allometric relationship based on stem diameter at 10 (SD10) and 55cm (SD55) from the shoot base in the mixed bioenergy belts. Allometric relations based on SD10 and SD55 explained 90-96% and 90-98% of the variation in shoot dry weights respectively with no differences between the destructive and the non-destructive methods. The individual stool yields varied widely among the species and within willow species with biomass yield range of 37.60-92.00 oven dry tons (ODT) ha-1 in 4-year growth cycle. The biomass yield of the bioenergy belt, predicted by allometric relations was 48.84ODTha-1 in 4-year growth cycle corresponding to 12.21ODTha-1year-1. The relatively high biomass yield is attributed to the border effects and the 'fertilizing effect' of alder due to nitrogen fixation, benefitting other SWRC components. On termination of 4-year growth cycle, the bioenergy belts were harvested and the biomass yield recorded was 12.54ODTha-1year-1, in close proximity to the biomass yield predicted by the allometric equations, lending confidence and robustness of the model for biomass yield determination in such integrated agro-ecosystem.
AB - Given the energetic, demographic and the climatic challenges faced today, we designed a combined food and energy (CFE) production system integrating food, fodder and mixed belts of Salix, Alnus and Corylus sp. as bioenergy belts. The objective was to assess the shoot dry weight-stem diameter allometric relationship based on stem diameter at 10 (SD10) and 55cm (SD55) from the shoot base in the mixed bioenergy belts. Allometric relations based on SD10 and SD55 explained 90-96% and 90-98% of the variation in shoot dry weights respectively with no differences between the destructive and the non-destructive methods. The individual stool yields varied widely among the species and within willow species with biomass yield range of 37.60-92.00 oven dry tons (ODT) ha-1 in 4-year growth cycle. The biomass yield of the bioenergy belt, predicted by allometric relations was 48.84ODTha-1 in 4-year growth cycle corresponding to 12.21ODTha-1year-1. The relatively high biomass yield is attributed to the border effects and the 'fertilizing effect' of alder due to nitrogen fixation, benefitting other SWRC components. On termination of 4-year growth cycle, the bioenergy belts were harvested and the biomass yield recorded was 12.54ODTha-1year-1, in close proximity to the biomass yield predicted by the allometric equations, lending confidence and robustness of the model for biomass yield determination in such integrated agro-ecosystem.
U2 - 10.1016/j.biombioe.2014.02.009
DO - 10.1016/j.biombioe.2014.02.009
M3 - Journal article
SN - 0961-9534
VL - 63
SP - 86
EP - 91
JO - Biomass and Bioenergy
JF - Biomass and Bioenergy
ER -