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在全球气候变化背景下,人工林的适应性管理对固碳潜力的提升具有重要影响。应用加拿大不列颠哥伦比亚大学开发的FORECAST森林生态系统管理模型,通过外业调查、查找相关文献资源等方式收集不同立地条件下杉木林分的生物量积累、林分密度、光响应曲线及土壤养分方面的数据。模型经过校准和检验后,模拟不同采伐剩余物处理方式对杉木人工林固碳量的影响。结果表明:SO处理(采伐茎干,采伐剩余物留在林地)对杉木林长期固碳效果最好;FR处理其次(采伐茎干,清除地上部分采伐剩余物),而WH(全树采伐,清除所有采伐剩余物)和SB(采伐后,火烧采伐剩余物)固碳效果最差。该研究可为杉木人工林的可持续经营提供理论依据。
In the context of global climate change, the adaptive management of plantations has a significant impact on the potential for carbon sequestration. The FORECAST forest ecosystem management model developed by the University of British Columbia, Canada, was used to collect the biomass accumulation, stand density, light response curve and soil nutrient content of the Chinese fir stand under different site conditions through field surveys and find relevant literature resources data. The model was calibrated and tested to simulate the effect of different harvesting residues on the carbon sequestration of Chinese fir plantation. The results showed that SO treatment (harvesting of stems and leftovers of logging plants) kept the best long-term carbon sequestration in Chinese fir plantations; followed by FR treatment (harvesting of stems and removal of above-ground residues), and WH Clear all logging residues) and SB (fire logging residues after harvest) have the worst carbon sequestration. This study can provide theoretical basis for the sustainable management of Chinese fir plantation.