杨树人工林生态系统碳储量与碳汇功能评估
摘 要
杨树人工林作为我国重要的速生树种，在碳汇功能与气候变化应对中具有显著作用。本研究以华北地区典型杨树人工林为对象，通过样地调查、生物量测定和土壤采样相结合的方法，系统评估了不同林龄杨树林的碳储量及其碳汇功能。研究采用异速生长方程估算乔木层生物量，结合凋落物和土壤有机碳含量分析，构建了完整的生态系统碳储量模型。结果表明，20年生杨树人工林生态系统总碳储量为156.3 t C/ha，其中乔木层占62.4%，土壤层占34.1%，凋落物层占3.5%。年净固碳量达到6.8 t C/ha/yr，显示出显著的碳汇能力。与天然次生林相比，杨树人工林的碳积累速率提高了约40%，表明其在中短期碳汇中的优势地位。研究创新性地提出了基于林龄动态变化的杨树林碳储量预测模型，为区域尺度碳汇潜力评估提供了科学依据。
关键词：杨树人工林；碳储量；碳汇功能
ASSESSMENT OF CARBON RESERVES AND CARBON SINK FUNCTION IN POPLAR PLANTATION ECOSYSTEM
ABSTRACT
As an important fast-growing tree species in China, poplar plantation plays a significant role in the function of carbon sink and climate change response. In this study, using typical poplar plantations in North China, the carbon reserves of different forests and their carbon sink functions were systematically evaluated by combining plot survey, biomass measurement and soil sampling. Allometric equations were used to estimate arbor layer biomass, and the analysis of litter and soil organic carbon content was combined to construct a complete ecosystem carbon reserve model. The results showed that the total carbon reserves of the 20-year-old poplar plantation ecosystem was 156.3 tC / ha, of which it accounted for 62.4% tree layer, 34.1% soil layer and litter layer 3.5%. The annual net carbon sequestration reached 6.8 tC / ha / yr, showing a significant carbon sink capacity. The poplar plantations increased carbon accumulation rate by about 40% as compared to natural secondary forests, indicating its dominant position in short-and medium-short-term carbon sinks. This paper innovatively proposed a carbon reserve prediction model of poplar forest forest, which provides a scientific basis for the assessment of carbon sink potential at regional scale.
KEY WORDS：Poplar plantation; carbon reserves; carbon sink function
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 研究背景及意义 1
1.2 研究目的和内容 1
第2章 杨树人工林碳储量分布特征 2
2.1 杨树人工林植被碳储量估算 2
2.2 土壤有机碳空间分布规律 2
2.3 不同林龄碳储量动态变化 3
第3章 杨树人工林碳汇功能评估方法 4
3.1 碳汇计量模型构建与验证 4
3.2 碳汇能力影响因素分析 4
3.3 区域尺度碳汇潜力评估 5
第4章 杨树人工林碳管理优化策略 6
4.1 基于碳储量的造林模式优化 6
4.2 提升碳汇功能的经营措施 6
4.3 碳中和目标下的管理对策 7
第5章 结论 8
参考文献 9
致 谢 10
摘 要
杨树人工林作为我国重要的速生树种，在碳汇功能与气候变化应对中具有显著作用。本研究以华北地区典型杨树人工林为对象，通过样地调查、生物量测定和土壤采样相结合的方法，系统评估了不同林龄杨树林的碳储量及其碳汇功能。研究采用异速生长方程估算乔木层生物量，结合凋落物和土壤有机碳含量分析，构建了完整的生态系统碳储量模型。结果表明，20年生杨树人工林生态系统总碳储量为156.3 t C/ha，其中乔木层占62.4%，土壤层占34.1%，凋落物层占3.5%。年净固碳量达到6.8 t C/ha/yr，显示出显著的碳汇能力。与天然次生林相比，杨树人工林的碳积累速率提高了约40%，表明其在中短期碳汇中的优势地位。研究创新性地提出了基于林龄动态变化的杨树林碳储量预测模型，为区域尺度碳汇潜力评估提供了科学依据。
关键词：杨树人工林；碳储量；碳汇功能
ASSESSMENT OF CARBON RESERVES AND CARBON SINK FUNCTION IN POPLAR PLANTATION ECOSYSTEM
ABSTRACT
As an important fast-growing tree species in China, poplar plantation plays a significant role in the function of carbon sink and climate change response. In this study, using typical poplar plantations in North China, the carbon reserves of different forests and their carbon sink functions were systematically evaluated by combining plot survey, biomass measurement and soil sampling. Allometric equations were used to estimate arbor layer biomass, and the analysis of litter and soil organic carbon content was combined to construct a complete ecosystem carbon reserve model. The results showed that the total carbon reserves of the 20-year-old poplar plantation ecosystem was 156.3 tC / ha, of which it accounted for 62.4% tree layer, 34.1% soil layer and litter layer 3.5%. The annual net carbon sequestration reached 6.8 tC / ha / yr, showing a significant carbon sink capacity. The poplar plantations increased carbon accumulation rate by about 40% as compared to natural secondary forests, indicating its dominant position in short-and medium-short-term carbon sinks. This paper innovatively proposed a carbon reserve prediction model of poplar forest forest, which provides a scientific basis for the assessment of carbon sink potential at regional scale.
KEY WORDS：Poplar plantation; carbon reserves; carbon sink function
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 研究背景及意义 1
1.2 研究目的和内容 1
第2章 杨树人工林碳储量分布特征 2
2.1 杨树人工林植被碳储量估算 2
2.2 土壤有机碳空间分布规律 2
2.3 不同林龄碳储量动态变化 3
第3章 杨树人工林碳汇功能评估方法 4
3.1 碳汇计量模型构建与验证 4
3.2 碳汇能力影响因素分析 4
3.3 区域尺度碳汇潜力评估 5
第4章 杨树人工林碳管理优化策略 6
4.1 基于碳储量的造林模式优化 6
4.2 提升碳汇功能的经营措施 6
4.3 碳中和目标下的管理对策 7
第5章 结论 8
参考文献 9
致 谢 10
