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在中国的典型种植森林中,净初级生产率和置年龄之间的关系

Ya-Ting Wang¹, Xiao-Juan Tong¹, Chong-Fan Guan^2,3

¹School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China.

Ying yong sheng tai xue bao = The journal of applied ecology

|September 8, 2023

概括

种植园林对碳捕获有很大的影响. 这项研究分析了中国五种种植物种的净初级生产率 (NPP),揭示了与年龄相关的趋势,这对于碳汇估计和物种选择至关重要.

科学领域:

生态生态学生态生态学
林业林业林业林业林业
气候变化科学气候变化科学

背景情况:

种植园林是重要的陆地碳汇.
了解净初级生产率 (NPP) 动态对于准确的碳捕获评估至关重要.
停留年龄显著影响森林生态系统的功能.

研究的目的:

分析中国五种主要种植树种的净初级生产率 (NPP) 和立年龄之间的关系.
开发准确的模型来估计不同年龄的种植园中的NPP.
为优化植树策略和增强碳吸收能力提供科学基础.

主要方法:

利用来自中国各地25个地点的五种主要种植物种的树环数据: *Robinia pseudoacacia*, *Quercus variabilis*, *Cunninghamia lanceolata*, *Pinus sylvestris* var. 蒙古和松树的形状.
使用生物质方程计算年均NPP,并将其缩放到标准水平.
应用了InTEC和Law模型以适应NPP标准的年龄关系,并使用R2和RMSE评估了模型的准确性.

主要成果:

根据物种的NPP趋势有所不同: *R. pseudoacacia*, *C. lanceolata*, 和 *P. tabuliformis* 显示NPP的增加然后平衡,而 *Q. variabilis* 和 *P. sylvestris* var. *mongolica*呈现出一个峰值,随后是下降.
确定了NPP-stand年龄曲线的特定物种的拐点,范围从11岁 (*P. sylvestris* var. * 蒙古*) 到20年 (*R. 伪木*).
无论是InTEC模型还是Law模型,对于大规模的核电站-标准年龄关系,都显示出高匹配精度 (R2 > 0.95).

结论:

为中国主要种植园建立了强大的核电站标准年龄关系,支持长期碳汇估计.
这些发现为多样化植林物种选择提供了有价值的见解,以最大限度地减少碳排放.
准确的核电站动态建模对于有效的森林管理和气候变化缓解战略至关重要.

关键词:

核电站-标准年龄关系碳汇估计碳汇估计净初级生产力.种植园种植园种植园

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