遂昌县主要森林类型固碳释氧功能及其价值评估

Evaluation of Main Forest Types Carbon Sequestration and Oxygen Release Services in Suichang County

摘要: 按照中国森林生态系统服务功能评估规范，对遂昌县6种主要森林类型(松林、杉木林、阔叶林、针阔混交林、毛竹林Phyllostachys edulis和灌木林)的固碳释氧功能进行研究。其中，根据遂昌县80个固定小班监测数据推算出各森林类型生物量，从而计算得到林分净生产力，并估算其价值。结果表明：1) 遂昌县主要森林生态系统年固碳释氧经济价值为323,612.68万元∙a⁻¹，单位面积年固碳释氧价值为16,383.95元∙hm⁻²∙a⁻¹。2) 从森林类型来看，年固碳释氧价值量最大为阔叶林(90,515.73万元∙a⁻¹)，最小的为松林(16,732.23万元∙a⁻¹)，年单位面积固碳释氧价值最大为灌木林(19,526.14元∙hm⁻²∙a⁻¹)，最小的为松林(10,202.54元∙hm⁻²∙a⁻¹)。3) 五年间，遂昌县主要森林类型单位面积固碳释氧价值增加2220.32元∙hm⁻²∙a⁻¹ (约16%)。由于固碳释氧功能在森林生态系统服务功能中的重要性，且本研究得到阔叶林与灌木林在遂昌县森林生态系统固碳释氧功能中有重要影响。因此，在遂昌县的生态林业建设决策中，建议增加阔叶林的比例，加快“针改阔工程”步伐，以产生更大的森林生态效益。

Abstract: According to the evaluation criteria of forest ecosystem service function in China, the carbon se-questration and oxygen release functions of six main forest types (pine forest, Chinese fir forest, broad-leaved forest, mixed coniferous and broad-leaved forest, Phyllostachys edulis and shrub forest) in Suichang County were studied. Based on the data from 80 permanent sample plots, we estimated the biomass, then calculated forest net productivity and the value of carbon sequestra-tion and oxygen release. The results showed that: 1) The annual total value of carbon sequestration and oxygen release of the main forest types was 3236.13 million yuan. In unit area scale, the annual value of carbon sequestration and oxygen release was 16,383.95 yuan per hectare. 2) The broadleaf forest had the highest annual value of carbon sequestration and oxygen release while the pine had the lowest, which were respectively 905.16 million yuan and 16.73 million yuan. In unit area scale, the scrub growth forest had the highest annual value of carbon sequestration and oxygen release while the pine had the lowest, which were 19,526.14 yuan per hectare and 10,202.54 yuan per hectare, respectively. 3) The annual value of carbon sequestration and oxygen release service increased by 2220.32 yuan per hectare than five years ago. Since carbon sequestration and oxygen release service are important for forest ecosystem services, the search holds that the broadleaf and scrub growth forests have significant influence in studying the general assessment of forest ecosystem services in Suichang County. Consequently, the research suggests the projects of increas-ing the broadleaf forest proportion and speeding up transforming from the coniferous forest into the broadleaf forest should be conducted to produce more forest ecological benefits.