稀释如何影响亚热带针叶树种植园的碳预算?
Mingjie Xu1,2, Shengtong Li1, Fengting Yang2
1College of Agronomy, Shenyang Agricultural University, Shenyang, 110866, China.
Carbon balance and management
|December 10, 2025
概括
在中国的森林稀疏化.
科学领域:
- 林业科学 林业科学
- 气候变化缓解减缓 气候变化缓解减缓
- 陆地生态 地球生态
背景情况:
- 自20世纪70年代以来,中国的广种植园大大促进了陆地碳汇.
- 由于生态风险,生长后种植需要管理.
- 薄化提供长期的好处,但导致短期的碳汇干扰,在森林碳预算估计中引起争议.
研究的目的:
- 量化稀释对森林碳流的影响.
- 为了比较三种不同的碳流量评估方法.
- 为碳预算估计和种植森林的森林管理提供基础.
主要方法:
- 使用了三种方法:1-塔,查看表 (LUT) 和2-塔方法.
- 两塔法被认为是跟踪季节性碳流变化的最可靠方法.
- 评估了与1塔和LUT方法相关的潜在偏差.
主要成果:
- 各种方法的一致结果表明,25%的稀释提高了原始生产率 (GPP),生态系统净生产率 (NEP) 和生态系统呼吸 (Re).
- 双塔法显示,在稀释后,GPP增加了9.8% (第一年) 和14.6% (第二年).
- 生态系统呼吸 (Re) 增加了12.6% (第一年) 和23.2% (第二年),NEP增加了5.4% (第一年) 和0.5% (第二年).
结论:
- 稀释对亚热带针叶树种植园的GPP,Re和NEP产生了积极的影响.
- 这些发现强调了减排对碳预算的有益影响,即使是在实施后的短期内.
- 支持稀薄作为接近成熟的种植森林的可行管理策略.
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