森林土壤温室气体通量对森林管理和全球大气变化的响应
发布时间：2018-11-09 08:14
【摘要】：森林土壤是温室气体重要的源和汇。探讨不同森林管理和全球大气变化下土壤温室气体通量特征,为有效减少温室气体排放及森林可持续管理等提供参考。笔者从森林土壤温室气体(forest soil green house gases)、森林管理(forest mangement)和全球大气变化(global atmospheric change)3个关键研究点,查阅近年来相关研究成果,归纳森林管理和全球大气变化下土壤温室气体通量的一般性模式。CO_2、CH_4和N_2O是3种重要温室气体,其通量间存在协同、消长和随机型耦合关系。森林管理如火烧、采伐和造林等显著影响土壤温室气体通量。一般情况下,火烧导致土壤N_2O通量降低,CH_4吸收量增加,CO_2通量因火烧类型、火烧强度、生态系统类型不同出现增加、减低和无影响3种结果;采伐通常导致土壤CO_2、CH_4和N_2O排放增加;造林可使土壤CO_2排放减少,对N_2O和CH_4通量的影响随生态系统类型、造林树种等而改变。全球大气变化如CO_2浓度升高、氮沉降和气温升高影响森林土壤温室气体通量。通常,CO_2浓度升高导致土壤CO_2和N_2O排放量增加,CH_4吸收量降低;氮沉降促进土壤N_2O排放、抑制CH_4吸收。气温升高导致土壤CO_2和N_2O排放增加。森林管理和全球大气变化对土壤温室气体通量的综合影响是非叠加的,有效的森林管理可能改变土壤温室气体通量对全球大气变化的响应。
[Abstract]:Forest soil is an important source and sink of greenhouse gases. The characteristics of soil greenhouse gas fluxes under different forest management and global atmospheric changes are discussed in order to provide references for effective reduction of greenhouse gas emissions and sustainable forest management. From three key research points of forest soil greenhouse gas (forest soil green house gases), forest management (forest mangement) and global atmospheric change (global atmospheric change), the author consulted the related research results in recent years. A general model of soil greenhouse gas fluxes under forest management and global atmospheric change is summarized. CO_2,CH_4 and N _ 2O are three important greenhouse gases whose fluxes are synergistic, fluctuating and stochastic coupling. Forest management, such as fire, logging and afforestation, significantly affected soil greenhouse gas fluxes. In general, soil N2O fluxes decreased and CH_4 uptake increased, and CO_2 fluxes increased due to different types of fire, fire intensity and ecosystem types, and decreased and had no effect on soil N2O fluxes. Felling usually results in an increase in soil CO_2,CH_4 and N2O emissions, and afforestation can reduce soil CO_2 emissions, and the effects of afforestation on N _ 2O and CH_4 fluxes vary with ecosystem types, afforestation species, and so on. Global atmospheric changes such as CO_2 concentration, nitrogen deposition and temperature increase affect greenhouse gas flux of forest soil. Generally, the increase of CO_2 concentration leads to the increase of soil CO_2 and N2O emissions, and the decrease of CH_4 uptake, while nitrogen deposition promotes soil N2O emissions and inhibits CH_4 uptake. Soil CO_2 and N2O emissions increased with the increase of air temperature. The combined effects of forest management and global atmospheric change on soil greenhouse gas flux are non-superimposed. Effective forest management may change the response of soil greenhouse gas flux to global atmospheric change.
【作者单位】： 东北林业大学林学院;
【基金】：国家重点研发计划(2016YFA0600803) 国家自然科学基金重点项目(41330530) 中央高校基本科研业务费专项资金项目(2572016AA06)
【分类号】：S714
[Abstract]:Forest soil is an important source and sink of greenhouse gases. The characteristics of soil greenhouse gas fluxes under different forest management and global atmospheric changes are discussed in order to provide references for effective reduction of greenhouse gas emissions and sustainable forest management. From three key research points of forest soil greenhouse gas (forest soil green house gases), forest management (forest mangement) and global atmospheric change (global atmospheric change), the author consulted the related research results in recent years. A general model of soil greenhouse gas fluxes under forest management and global atmospheric change is summarized. CO_2,CH_4 and N _ 2O are three important greenhouse gases whose fluxes are synergistic, fluctuating and stochastic coupling. Forest management, such as fire, logging and afforestation, significantly affected soil greenhouse gas fluxes. In general, soil N2O fluxes decreased and CH_4 uptake increased, and CO_2 fluxes increased due to different types of fire, fire intensity and ecosystem types, and decreased and had no effect on soil N2O fluxes. Felling usually results in an increase in soil CO_2,CH_4 and N2O emissions, and afforestation can reduce soil CO_2 emissions, and the effects of afforestation on N _ 2O and CH_4 fluxes vary with ecosystem types, afforestation species, and so on. Global atmospheric changes such as CO_2 concentration, nitrogen deposition and temperature increase affect greenhouse gas flux of forest soil. Generally, the increase of CO_2 concentration leads to the increase of soil CO_2 and N2O emissions, and the decrease of CH_4 uptake, while nitrogen deposition promotes soil N2O emissions and inhibits CH_4 uptake. Soil CO_2 and N2O emissions increased with the increase of air temperature. The combined effects of forest management and global atmospheric change on soil greenhouse gas flux are non-superimposed. Effective forest management may change the response of soil greenhouse gas flux to global atmospheric change.
【作者单位】： 东北林业大学林学院;
【基金】：国家重点研发计划(2016YFA0600803) 国家自然科学基金重点项目(41330530) 中央高校基本科研业务费专项资金项目(2572016AA06)
【分类号】：S714
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