在地中海松树林中通过灌增强碳封存
Rafat Qubaja1,2,3,4, Murray Moinester5
1Department of Plant & Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
Plants (Basel, Switzerland)
|March 14, 2026
概括
位于地中海半干旱地区的阿勒松树林会吸收大量大气中的二氧化碳 (CO2). 灌大大提高了这些重要生态系统中的有机和无机碳封存.
科学领域:
- 林业林业 林业 林业 林业
- 生态生态学 生态生态学
- 气候科学 气候科学
背景情况:
- 地中海的干旱地区,特别是像阿勒松 (Pinus halepensis) 这样的半干旱森林,在大气中的二氧化碳 (CO2) 捕获中发挥着作用.
- 了解这些地区的碳捕获动态对于减缓气候变化战略至关重要.
- 水的可用性是干旱和半干旱环境中森林生产力和碳吸收的关键限制因素.
研究的目的:
- 在地中海半干旱的阿勒松树林中量化有机和无机碳封存.
- 为了区分土壤水应激与大气水需求对二氧化碳封存的影响.
- 评估长期灌对碳捕获率的影响.
主要方法:
- 使用气体交换技术进行现场测量.
- 生物质和土壤碳评估的库存计数方法.
- 遥感技术用于更广泛的空间分析.
- 雨水控制地块和长期滴灌灌地块之间的比较.
主要成果:
- 有机碳封存 (OCS) 测量约为550g CO2 m−2 yr−1,其中60%在土壤中,40%在生物质中.
- 无机碳封存 (ICS) 测量在约65g CO2 m−2 yr−1 (0.5m土壤深度) 通过石沉.
- 与对照地块相比,滴水灌的地块呈现出约3倍高的OCS和约1.8倍的ICS.
- 对于OCS,灌效应在土壤和生物质之间均分布.
结论:
- 地中海旱地森林具有相当大的碳捕集能力.
- 灌显著提高了阿勒松树林的有机和无机碳封存.
- 包括灌在内的森林管理策略可以优化水有限的生态系统中的碳封存潜力.
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