<p>The bottomland hardwood forests of the south-central United States have long served as feedstock sources for the region’s pulp and paper industries. However, excessive mortality, harvesting/transportation challenges, and heightened demand from the oil and gas industries have negatively impacted hardwood supply chain dynamics in the region. Recent findings show that hybrid sweetgum (<i>Liquidambar formosana x styraciflua</i>) has high potential as a feedstock species, due to its increased specific gravity and productivity when compared to half-sib native sweetgum (<i>Liquidambar styraciflua</i>). To better understand hybrid sweetgum’s growth and economic potential, we conducted a timber inventory and simulated the growth and yield of multiple hybrid and half-sib native sweetgum stands. The associated land expectation values (LEVs) were calculated for a financial analysis. In addition, a range of management regimes, market scenarios, and discount rates were included to allow for sensitivity analysis. In general, the increased growth rate of the hybrid stands allowed them to excel, despite the higher cost of hybrid seedlings. The hybrid stands produced greater LEVs than the half-sib stands under every combination of management, market, and discount rate. This study found that hybrid sweetgum exhibits greater economic returns, supporting its candidacy as a biomass feedstock for the region. Therefore, this study’s results have important management implications for private landowners, timber companies, and other forestry practitioners in the south-central United States.</p>

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Growth Projections and Economic Analysis of Hybrid Sweetgum Plantations in the South-Central United States

  • Jacob Lewis,
  • Omkar Joshi,
  • Lu Zhai,
  • Lixia Lambert,
  • Rodney E. Will

摘要

The bottomland hardwood forests of the south-central United States have long served as feedstock sources for the region’s pulp and paper industries. However, excessive mortality, harvesting/transportation challenges, and heightened demand from the oil and gas industries have negatively impacted hardwood supply chain dynamics in the region. Recent findings show that hybrid sweetgum (Liquidambar formosana x styraciflua) has high potential as a feedstock species, due to its increased specific gravity and productivity when compared to half-sib native sweetgum (Liquidambar styraciflua). To better understand hybrid sweetgum’s growth and economic potential, we conducted a timber inventory and simulated the growth and yield of multiple hybrid and half-sib native sweetgum stands. The associated land expectation values (LEVs) were calculated for a financial analysis. In addition, a range of management regimes, market scenarios, and discount rates were included to allow for sensitivity analysis. In general, the increased growth rate of the hybrid stands allowed them to excel, despite the higher cost of hybrid seedlings. The hybrid stands produced greater LEVs than the half-sib stands under every combination of management, market, and discount rate. This study found that hybrid sweetgum exhibits greater economic returns, supporting its candidacy as a biomass feedstock for the region. Therefore, this study’s results have important management implications for private landowners, timber companies, and other forestry practitioners in the south-central United States.