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植物挥发性排放对增加沉积的反应:对Eucalyptus urophylla进行试点研究

Shiwei Liu¹, Daocheng Gong², Yujin Wang¹

¹College of Environment and Climate, Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China.

The Science of the total environment

|August 31, 2024

概括

沉积对树产生的生物性挥发性有机化合物 (BVOC) 排放产生重大影响. 增加的导致更高的BVOC排放,特别是异烯和α-pinene,影响空气质量.

科学领域:

大气化学与生态学
生物地质化学循环的过程
植物生理学植物生理学

背景情况:

生物的挥发性有机化合物 (BVOCs) 在大气化学中起着至关重要的作用.
(N) 沉积是一个重要的环境因素,可能会影响BVOC排放,但应对措施仍在争论中.
像中国南部这样N沉积严重的地区的树种植园对于了解这些影响至关重要.

研究的目的:

为了研究不同 (N) 沉积水平对Eucalyptus urophylla的BVOC排放的影响.
为了确定影响在丰富下BVOC排放的关键光合作用参数.
评估排放模型的准确性和BVOCs对二次空气污染的贡献.

主要方法:

成熟的树 (Eucalyptus urophylla) 树接受了三个N处理:N0 (对照),N50 (50公斤N hm−2 yr−1),N100 (100公斤N hm−2 yr−1).
测量了17种BVOC,重点是异烯,α-pinene和d-limonene.
叶子净二氧化碳同化被分析为一个关键的光合作用参数.

主要成果:

在N50处理下,与N0和N100相比,BVOC总排放量几乎翻了一番.
在N50下,异烯和α-pinene的排放量显著增加,而在N100下,d-limonene的排放量减少.
对于N50,局部排放因子 (EF) 比默认的MEGAN模型值高,表明潜在的低估.

结论:

增加的沉积,特别是在中等水平 (N50),可以大大提高欧树的BVOC排放.
叶子净二氧化碳同化是这些N沉积诱导的BVOC排放变化的关键驱动因素.
目前的模型可能低估了高沉积地区的BVOC排放量,因此需要更新,本地化EF以准确地建模空气质量.

关键词:

生物性挥发性有机化合物生物性挥发性有机化合物排放因子排放因子树是什么意思? 树是什么意思添加气是为了增加气.二次大气污染二次大气污染中国南部的中国南部.

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