2024-06-02-未来能源研究所-木制品市场和森林政策对土地利用变化的影响（英）_38页_673kb

Summary of "Effects of Wood Products Markets and Forest Policies on Land Use Change"

Abstract

Wood products markets and forest policies significantly influence land use decisions in the US South. The paper models interactions between timber prices, demand expansion, and land use switching. Key findings include:

• Economic growth (e.g., post-Great Recession) leads to minimal net forest area change due to offsetting afforestation and deforestation.
• Policies increasing timber demand without urban land use growth (e.g., expanding wood content in construction) are highly effective for afforestation.
• Tree-planting subsidies have a smaller impact compared to revenue boosts from timber markets.
  Agricultural returns strongly affect deforestation but not afforestation, while forest policy reforms can enhance carbon sequestration and conservation outcomes.

Key Findings

• Land Use Dynamics: Timber price volatility and returns drive afforestation decisions, while agricultural income favors forest-to-agricultural conversions.
• Policy Simulation:
  • A 20% increase in wood use for construction results in substantial afforestation (0.249 million hectares more) than a tree-planting subsidy (0.055 million hectares).
  • Carbon offset policies could boost forest expansion due to enhanced timber revenues.
• Elasticity Results: Afforestation is more responsive to changes in sawtimber prices than planting costs. Policies influencing timber demand have up to 2.192% elasticity on regional forest area.

Implications

Policies should prioritize market-based incentives to increase timber demand rather than direct subsidies for afforestation. This approach could expand forest areas for ecosystem benefits like carbon sequestration and watershed protection in the US South.