Estimating Carbon Sequestration by Sugi (Cryptomeria japonica) Plantations According to Site and Management Conditions(<Special Issue>Multipurpose Forest Management)

DOI Web Site 参考文献30件 オープンアクセス
  • Asada Yoko
    Graduate School of Agricultural and Life Sciences, the University of Tokyo:(Present office)Mitsubishi UFJ Research & Consulting Co., Ltd.
  • Tatsuhara Satoshi
    Graduate School of Agricultural and Life Sciences, the University of Tokyo

この論文をさがす

説明

Carbon sequestration by plantation forests depends on the site conditions and silvicultural system used. This study estimated the spatial distribution of carbon sequestration by sugi (Cryptomeria japonica) plantations in a study area according to site quality and thinning regime. The study area was the University of Tokyo Forest in Chiba, which is located on the southern Boso Peninsula, Japan. Site index curves were created from height measurements in sugi plantation experimental plots. Sixty-five sampling points were located in sugi plantations, and the heights of three to five dominant trees around each sample point were measured. The site index was calculated for each sampling point, and the average height at 60 years of age was estimated from the average height at each sampling point using the site index curves. Site factors were calculated from a digital elevation model (DEM) in a geographic information system (GIS). Discriminant functions were developed from five site factors: slope, shaded relief, distance from a ridge, plan curvature, and the wetness index. The correctness rate was 60%. In addition, stand growth was predicted for each site quality using LYCS ver. 2.32 under low thinning at frequencies of 1, 2, 3, and 5 times. Carbon sequestration was estimated from the growth of stand volume multiplied by the basic density, biomass expansion factors, ratio of total biomass to aboveground biomass, and carbon fraction. The estimated carbon storage and sequestration for the study area were mapped using GIS according to the site quality estimated from the five site factors and specified thinning regimes. The average carbon storage per hectare peaked at a thinning frequency of one. Thinning during the young stage increased carbon storage, although frequent and strong thinning regimes decreased carbon storage. The average carbon sequestration per hectare increased with thinning frequency because more frequent thinning leads to faster growth just after thinning in more stands. These maps enabled us to understand the change in carbon storage and sequestration over the study area according to the chosen silvicultural system.

収録刊行物

参考文献 (30)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ