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黄河三角洲滨海盐沼CO_2, CH_4通量特征及其影响因素
Authors
宋鲁萍
张立华
邵宏波
Publication date
1 January 2014
Publisher
Abstract
采用静态暗箱/气相色谱(GC)法, 考察了2012年4月至12月黄河三角洲不同植被类型盐沼CO_2和 CH_4通量的季节和日变化及其与主要环境因子的关系.研究发现:时间变化上, CO_2通量范围为2. 287 ~331. 371 mg·m~(-2) ·h~(-1), 均值为77. 107 mg·m~(-2) ·h~(-1), 该研究区域四季均表现为CO_2排放源, CH_4通量范围为-0.004 ~ 0.015 mg·m~(-2) ·h~(-1), 均值为0.003 mg·m~(-2) ·h~(-1), 黄河三角洲滨海盐碱地春夏季表现为CH_4吸收汇, 秋冬季表现为CH_4弱排放源;空间变化上, 不同类型盐沼CO_2通量整体由小到大依次表现为, 裸地, 碱蓬(Suaeda glauca), 芦苇(Phragmites australis), 柽柳(Tamarix chinensis), 除裸地外, 柽柳、碱蓬和芦苇群落均表现为CH_4汇.影响因素的分析结果表明:温度和植被是影响CO_2和CH_4通量的重要因子.因此, 在估算滨海盐沼温室气体排放清单时, 应特别注重温度和植被的影响
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Last time updated on 24/06/2021