Concentration- and flux-based ozone dose-response relationships for five poplar clones grown in North China
Concentration- and flux-based ozone dose-response relationships for five poplar clones grown in North China
复制标题
华北地区五种杨树无性系基于浓度和通量的臭氧剂量响应关系
DOI：
10.1016/j.envpol.2015.08.034
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发表时间：
2015-12-01
影响因子：
8.9
通讯作者：
Feng, Zhaozhong
中科院分区：
文献类型：
--
作者：
Hu, Enzhu;Gao, Feng;Feng, Zhaozhong
针对中国杨树建立了基于浓度和通量的 O-3 剂量响应关系。测量了五个杨树无性系的气孔导度 (g(s))，以参数化贾维斯型乘法 gs 模型。克隆之间的最大 gs 和其他模型参数有所不同。当使用 7 nmol m(-2) s(-1) 的吸收率阈值对植物毒性臭氧剂量 (POD) 进行积分时，获得了气孔 O-3 通量与总生物量之间最强的关系。基于通量和基于浓度的剂量反应关系之间的 R-2 值相似。臭氧浓度高于28 -36 nmol mol(-1) 会导致杨树生物量产量减少。与杨树总生物量减少5%相关的AOT(40)（累计O-3暴露超过40 nmol mol(-1)）和POD7的临界水平分别为12 mu mol mol(-1) h和3.8 mmol m(-2)。 (C) 2015 Elsevier Ltd. 保留所有权利。
Concentration- and flux-based O-3 dose-response relationships were developed for poplars in China. Stomatal conductance (g(s)) of five poplar clones was measured to parameterize a Jarvis-type multiplicative gs model. The maximum gs and other model parameters varied between clones. The strongest relationship between stomatal O-3 flux and total biomass was obtained when phytotoxic ozone dose (POD) was integrated using an uptake rate threshold of 7 nmol m(-2) s(-1). The R-2 value was similar between flux-based and concentration-based dose-response relationships. Ozone concentrations above 28 -36 nmol mol(-1) contributed to reducing the biomass production of poplar. Critical levels of AOT(40) (accumulated O-3 exposure over 40 nmol mol(-1)) and POD7 in relation to 5% reduction in total biomass for poplar were 12 mu mol mol(-1) h and 3.8 mmol m(-2), respectively. (C) 2015 Elsevier Ltd. All rights reserved.