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通过对我国长白山自然保护区红松针阔混交林和美国Andrews试验林异叶铁杉林的林木死亡量、粗死木质物(CWD)贮量、分解速率和它们在生态系统养分循环等方面动态研究表明,CWD是温带天然林生态系统的重要组成部分,它们在生态系统功能方面的重要性,因森林类型的不同而不尽相同,CWD在针叶林中比针阔混交林中更为重要。CWD在生态系统养分循环中的一个重要作用,很可能在于系统遭受重大外界扰动后,起到贮藏养分,增加系统稳定性的作用。未来全球森林凋落物C贮量估测时,应该包括CWD,否则将低估全球森林凋落物C贮量2.0—16×10~(13)kg,系统相对误差达2—10％。
The dynamic studies on the amount of dead wood, the stock of dead wood (CWD), their decomposition rate and their nutrient cycling in ecosystem of Pinus koraiensis-Coniferous-Broad-leaved Mixed Forest in Changbai Mountain Nature Reserve and the steppe CWDs are important components of temperate natural forest ecosystems. Their importance in ecosystem functioning varies with forest types. CWDs are more important in coniferous forests than coniferous and broad-leaved mixed forests. An important role of CWD in the ecosystem nutrient cycle is likely to be that the system plays a role of storing nutrients and increasing the stability of the system after being subjected to major external disturbances. The future global forest litter C stock assessment should include the CWD, otherwise it will underestimate the global forest litter C storage of 2.0-16 × 10 ~ (13) kg, the relative error of the system of 2-10%.