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土壤作为陆地生态系统中最大的有机碳库,与大气、气候和土地利用变化有着紧密的联系,土壤有机质和气候,土地利用变化影响着土壤有机碳的动态变化。为了充分了解它们之间的相互作用,国内外发展了多种模拟模型。本文概括了土壤有机碳的组成和主要影响因素;介绍了目前国内外的有关土壤有机碳模型。并通过对国内外研究现状的对比分析,应提出以下几方面启示:土壤有机碳模型不再仅仅是基于经验,而应向着基于机理的方向发展;所建立的模型能揭示出土壤碳循环、气候和土地利用变化之间的相互作用;利用地理信息系统、遥感技术和方法为模型构建和运行提供工具和数据;模型应向全球尺度发展,并能动态的描述土壤有机碳的时空变化。同时,要加强各种情景研究,为中国制定温室气体排放政策提供理论基础和依据。图4参58。
Soil, as the largest organic carbon pool in terrestrial ecosystems, is closely related to atmospheric, climate and land use changes. Soil organic matter, climate and land use change have an impact on the dynamic changes of soil organic carbon. In order to fully understand the interaction between them, a variety of simulation models have been developed at home and abroad. This paper summarizes the composition and main influencing factors of soil organic carbon, and introduces the current relevant models of soil organic carbon at home and abroad. And through the comparative analysis of the research status at home and abroad, the following enlightenments should be put forward: Soil organic carbon model is no longer based on experience alone, but should move toward mechanism-based direction. The established model can reveal soil carbon cycle, climate And land use change; provide tools and data for model construction and operation by using GIS, remote sensing technologies and methods; the model should be developed on a global scale and be able to describe the temporal and spatial changes of soil organic carbon dynamically. At the same time, it is necessary to strengthen various scenarios to provide the theoretical basis and basis for China’s formulation of greenhouse gas emission policies. Figure 4 reference 58.