The development of biomass resources as a strategy to offset
consumption of fossil fuels has become a priority in the United States. Short-rotation
woody crops (SRWC) are a biomass that will become more important as demand for
biomass feedstock increases. We
explored the suitability of a Metasequoia glyptostroboides as a potential SWRC. Metasequoia is
a fast growing, non-invasive deciduous conifer, indigenous to China. It is planted as a horticultural
species around the world and has a broad climatic tolerance. Nevertheless its
potential as a SWRC in the United States has never been evaluated. We measured the diameter, height
growth, biomass and productivity of 11 year old trees from 20 different genetic
families growing in an unfertilized plantation in East Brunswick, N.J.
USA. Averaged across all families
the total aboveground biomass (oven dry weight) of the plantation equaled 24.2
Mg ha-1 after 11 growing seasons with an annual biomass yield of 2.2
Mg ha-1. Biomass
production was spatially heterogeneous within the plantation. Cumulative
aboveground biomass varied from a high of 41.2 Mg ha-1 to a low of
14.9 Mg ha-1 after 11 years.
These differences are due to edaphic variation within the
plantation. Biomass production
also varied among families. Two families produced significantly less (p < 0.01) biomass than the 18 other families. The
annual biomass yield of this plantation is somewhat lower than commonly
planted, fast growing SRWC biomass species. However standing aboveground
biomass after 11 years of growth is within the range reported for other SRWC
planted in the United States.