草地学报2026，Vol.34Issue(7)：2568-2578,11.DOI:10.11733/j.issn.1007-0435.2026.07.020
滇西北高寒草甸生态系统生物源挥发性有机化合物(BVOC)排放的季节特征
Seasonal Variations of Biogenic Volatile Organic Compound Emissions from An Alpine Meadow Ecosystem in Northwestern Yunnan
摘要
Abstract
Biogenic volatile organic compound(BVOC)produced and emitted by plants exhibit high chemical reactivity in the atmosphere,exerting significant influence on atmospheric chemistry and climate change.They constitute important atmospheric trace gases.To elucidate the seasonal variation patterns and driving factors of BVOC emissions in alpine meadows,this study employed a dynamic headspace sampling system coupled with GC/MS technology for in situ monitoring in alpine meadows of northwestern Yunnan from July to October 2024,concurrently recording vegetation composition and environmental factors.we detected over 130 BVOCs belonging to 11 classes,including isoprene and monoterpenes.Total BVOC emission rates exhibited pro-nounced seasonal variation,peaking in July[(2485.51±847.08)μg·m-2·h-1]and reaching a minimum in October[(206.27±166.11)μg·m-2·h-1].Emissions from July to August were dominated by isoprene(nearly 100%),while emissions from September to October exhibited greater diversity,with notable increases in green leaf volatiles,sesquiterpenes,and aldehydes.Random forest analysis indicated isoprene as the key compound distinguishing monthly emission patterns.BVOC emissions were jointly influenced by temperature,light intensity,and vegetation structure:high temperatures and strong light promoted isoprene release,whereas low temperatures and plant senescence enhanced non-light-dependent BVOC emissions.Coverage of Carex muliensis was significantly positively correlated with isoprene emissions,while co-occurring species heterogene-ity and flowering period variations enhanced BVOC emission diversity.These findings would aid in our under-standing of BVOC-driven atmospheric processes and climatic feedbacks within the alpine meadows of north-western Yunnan.关键词
生物源挥发性有机化合物/高寒草甸生态系统/物候/季节变化Key words
Biogenic volatile organic compounds/Alpine meadow ecosystems/Plant phenology/Seasonal variation分类
农业科技引用本文复制引用
高顺心,田斌,王树林,王莲,李涛..滇西北高寒草甸生态系统生物源挥发性有机化合物(BVOC)排放的季节特征[J].草地学报,2026,34(7):2568-2578,11.基金项目
青藏高原高寒草甸挥发性有机物排放对放牧强度的响应项目(32271692) （32271692）
基于光合-挥发物耦合机制的川西高寒草地高碳汇草种资源筛选(2026NSFSC0129)资助 （2026NSFSC0129）
