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中文摘要：
全球变化，特别是大气成分变化引起的散射辐射变化已经并将继续影响陆地生态系统的生产力与碳收支。该文综述了散射辐射的影响因子及其估算方法，分析了散射辐射对植被光能利用率（light．use efficiency，LUE）、陆地生态系统生产力及其碳收支的影响过程与控制机理，在此基础上提出了未来拟加强研究的方面：1）散射辐射对植物光合作用影响的机理及其在不同时空尺度的反应；2）散射辐射及其与其他环境因子的相互作用对植物与冠层光合作用影响的定量描述；3）散射辐射及其与其他环境因子的相互作用对土壤呼吸作用的影响过程与控制机理；4）植物对散射辐射及其与其他环境因子相互作用的适应性研究；5）散射辐射及其与其他环境因子的相互作用对陆地生态系统生产力及其碳收支的影响过程与调控对策。
英文摘要：
Changes of diffuse radiation resulting from global changes, especially atmospheric composition changes, influence terrestrial ecosystem productivity and the carbon budget. We review the effects of diffuse radiation on terrestrial ecosystem productivity and carbon budget, including controls and methods of estimating diffuse radiation, processes and mechanisms of diffuse radiation effects on canopy light-use efficiency （LUE）, terrestrial ecosystem productivity and carbon budget. Suggested future research tasks are study of 1） responses of leaf photosynthesis to diffuse radiation at different temporal and spatial scales; 2） effects of diffuse radiation and its interaction with other environmental factors on photosynthesis and modeling; 3） effects of diffuse radiation and its interaction with other environmental factors on soil respiration; 4） adaptation of plants and terrestrial ecosystems to diffuse radiation and its interaction with other environmental factors; and 5） response processes and mechanisms of terrestrial ecosystem productivity and carbon budget to diffuse radiation and its interaction with other environmental factors.
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