生态学杂志2017，Vol.36Issue(12)：3462-3469,8.DOI:10.13292/j.1000-4890.201712.001
模拟氮沉降对鼎湖山典型森林地表烷烃、烯烃通量的影响
Effects of simulated nitrogen deposition on alkane and alkene fluxes from forest floor at Dinghushan
摘要
Abstract
Alkane and alkene,two major types of volatile orgamc compounds (VOCs),play critical roles in atmospheric chemistry and have great effect on global carbon cycle.Continuing elevated nitrogen deposition will change forest soil ecological processes,which will then influence VOCs fluxes from the forest floor.Static chambers and preconcentrator-GC-MS technique were used to investigate the responses of alkane and alkene fluxes to the simulated nitrogen deposition from the floor of two typical forest ecosystems,namely masson pine forest (PF) and monsoon evergreen broadleaf forest (BF) in Dinghushan.The results showed that for the natural nitrogen deposition,PF floor acted as a sink for alkane and a source for alkene,with the maximum uptake rate of-117.616±73.048 pmol · m-2 · s-1 for undcane and the maximum emission rate of 220.301±159.543 pmol · m-2 · s-1 for α-pinene.BF floor acted as a source of both alkane and alkene.Simulated nitrogen deposition promoted the emission of alkane,changed the function of PF forest floor from alkane "sink" to "source",and the effect became more significant with the elevating nitrogen level.On the contrary,the emission of alkene was restrained in PF,or even PF floor changed from alkene "source" to "sink",and the low level of nitrogen input had a significant influence.Simulated nitrogen deposition changed the BF floor from "source" to "sink"for both alkane and alkene.Additionally,alkane flux differed significantly between the two forests,and the alkene flux differed among compounds in the same forest.关键词
氮沉降/挥发性有机物/通量/鼎湖山/森林地表Key words
nitrogen deposition/volatile organic compounds (VOCs)/flux/Dinghushan/forest floor引用本文复制引用
张丽丽,印亮,郑丽丽,黄幸然,易志刚..模拟氮沉降对鼎湖山典型森林地表烷烃、烯烃通量的影响[J].生态学杂志,2017,36(12):3462-3469,8.基金项目
国家自然科学基金项目(41473083和41173090)资助. （41473083和41173090）
