Journal
GLOBAL CHANGE BIOLOGY BIOENERGY
Volume 10, Issue 10, Pages 735-751Publisher
WILEY
DOI: 10.1111/gcbb.12498
Keywords
Populus; Salix; short cutting cycle intensive culture; short-rotation woody crops
Funding
- North Central Regional Sun Grant Center at South Dakota State University through US Department of Energy Bioenergy Technologies Office [DE-FC36-05GO85041]
- USDA AFRI
- New York State Energy Research and Development Authority (NYSERDA)
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To increase the understanding of poplar and willow perennial woody crops and facilitate their deployment for the production of biofuels, bioproducts, and bioenergy, there is a need for broadscale yield maps. For national analysis of woody and herbaceous crops production potential, biomass feedstock yield maps should be developed using a common framework. This study developed willow and poplar potential yield maps by combining data from a network of willow and poplar field trials and the modeling power of PRISM-ELM. Yields of the top three willow cultivars across 17 sites ranged from 3.60 to 14.6Mgha(-1)yr(-1) dry weight, while the yields from 17 poplar trials ranged from 7.5 to 15.2Mgha(-1)yr(-1). Relationships between the environmental suitability estimates from the PRISM-ELM model and results from field trials had an R-2 of 0.60 for poplar and 0.81 for willow. The resulting potential yield maps reflected the range of poplar and willow yields that have been reported in the literature. Poplar covered a larger geographic range than willow, which likely reflects the poplar breeding efforts that have occurred for many more decades using genotypes from a broader range of environments than willow. While the field trial data sets used to develop these models represent the most complete information at the time, there is a need to expand and improve the model by monitoring trials over multiple cutting cycles and across a broader range of environmental gradients. Despite some limitations, the results of these models represent a dramatic improvement in projections of potential yield of poplar and willow crops across the United States.
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