| 摘要: |
| 【目的】对黄龙山蔡家川林场主要森林类型的碳储量和碳密度进行计算,为该区域森林碳汇功能研究提供参考。【方法】利用1986和1997年黄龙山蔡家川林场森林资源二类调查数据，依据不同森林类型生物量与蓄积量之间的回归方程以及森林生物量与碳储量、碳密度的关系，对该林场主要森林类型（柏木（Cypress）林、杨树（Populus）林、桦木（Betula）林、栎树（Quercus）林、油松（Pinus tabulaeformis）林、杂木林（Nonmerchantable woods））的碳储量、碳密度进行推算和分析，并与全国及西北五省（区）相同森林类型碳密度进行了对比。【结果】1986和1997年，该林场2年平均森林总碳储量为387 740 t，平均森林碳密度为17.7 t/hm2；1997年森林总碳储量比1986年减少9.65%,森林平均碳密度增长3.38%。各森林类型1986和1997年的平均碳密度大小顺序依次为栎树林（28.06 t/hm2）、油松林（24.35 t/hm2）、桦木林（21.04 t/hm2）、杂木林（11.86 t/hm2）、柏木林（11.03 t/hm2）和杨树林（10.04 t/hm2）；1986和1997年不同生长阶段林分平均碳密度大小顺序依次为近熟林（25.56 t/hm2）、幼龄林（25.49 t/hm2）、中龄林（24.77 t/hm2）、成熟林（13.53 t/hm2）、过熟林（12.84 t/hm2）。该林场柏木林、桦木林、栎树林、杨树林、杂木林的森林碳密度均低于全国平均水平，但油松林的平均碳密度较全国平均水平高92.0%。【结论】1986和1997年，该林场森林具有较好的碳汇能力，但这2年间森林碳汇能力变化不显著；森林类型不同或同期林分生长阶段不同，其所具有的碳汇能力存在差异；保护和管理好栎树林、油松林、桦木林，并大力开展幼龄林、中龄林和近熟林的经营抚育工程，对增加该林场森林的碳汇功能具有重要贡献。 |
| 关键词: 黄龙山蔡家川林场 森林类型 碳储量 碳密度 |
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| 基金项目:国家自然科学基金项目（30972296) |
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| Study on carbon density and its dynamic change of forest types in Huanglong Montain Forestry Region |
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| Abstract: |
| 【Objective】This paper calculated the carbon storage and density in Caijiachuan forest farm in Huanglong Mountains,which would provide reference to research the function of forest carbon sink in this area.【Method】The research built the regression equation of biomass and volume and analyzed the relationship between biomass and carbon storage,carbon density of different forest types,with the forest resource inventory data for management.This paper also calculated and analyzed the carbon storage and density of main forest types (including Cypress,Populus,Betula,Quercus,Pinus tabulaeformis,Nonmerchantable woods) in this forest farm,and compared with the carbon density of the same forest types in whole country and five provinces in northwest of China.【Result】In this forest farm,the average carbon storage was 387 740 t and the average carbon density being 17.7 t/hm2 in 1997 and 1986;The total carbon storage decreased by 9.65% and the average carbon density increased by 3.38% in 1997 compared with that in 1986;The average carbon density of main forest types was in the order of oaks(28.06 t/hm2),Chinese Pine forest(24.35 t/hm2),Birch Forest(21.04 t/hm2),weed tree forest(11.86 t/hm2),Cupressus funebris forest (11.03 t/hm2) and Poplar forest (10.04 t/hm2).The average carbon density of main forest types was in the order of near mature forest (25.56 t/hm2),young forest (25.49 t/hm2),medium forest (24.77 t/hm2),mature forest (13.53 t/hm2),and over-mature forest (12.84 t/hm2).【Conclusion】This forest farm had good ability in carbon sink,but the change of the ability of carbon sink was not significant in 1986 and 1997;The ability of carbon sink was different among different ages and types of forest.Protecting and managing oaks,Chinese pine forest and birch forest well and carrying out the management and forest tending of young forest,medium forest,and near-mature forest contributes greatly to carbon sink in this forest farm. |
| Key words: Caijiachuan forest farm in Huanglong Mountains forest types carbon storage carbon density |
