[1]刘岳坤,庞军柱*,扆凡,等. 秦岭火地塘林区不同海拔不同林型土壤CO2、CH4、N2O通量研究[J].西北林学院学报,2019,34(1):1-10.[doi:10.3969/j.issn.1001-7461.2019.01.01]
　LIU Yue-kun,PANG Jun-zhu*,YI Fan,et al. Soil-Atmosphere Exchange of Nitrous Oxide,Methane and Carbon Dioxide of Different Forest Types at Different Elevations in Huoditang Forest Region of Qinling Mountains[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2019,34(1):1-10.[doi:10.3969/j.issn.1001-7461.2019.01.01]
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 秦岭火地塘林区不同海拔不同林型土壤CO2、CH4、N2O通量研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第34卷
期数:
2019年第1期
页码:
1-10
栏目:
出版日期:
2019-01-31

文章信息/Info

Title:
 Soil-Atmosphere Exchange of Nitrous Oxide,Methane and Carbon Dioxide of Different Forest Types at Different Elevations in Huoditang Forest Region of Qinling Mountains
文章编号:
1001-7461(2019)01-0001-10
作者:
 刘岳坤1; 庞军柱1; 2; 3*; 扆凡1; 彭长辉2; 张硕新1; 3; 侯琳1; 3; 王效科4; 张红星4
 (1.西北农林科技大学 林学院，陕西 杨陵 712100；2.西北农林科技大学 生态预测与全球变化中心，陕西 杨陵 712100；3.陕西秦岭生态系统国家野外科学观测研究站，陕西 安康 711699；4.中国科学院 生态环境研究中心，北京 100085)
Author(s):
 LIU Yue-kun1; PANG Jun-zhu1; 2; 3*; YI Fan1; PENG Chang-hui2; ZHANG Shuo-xin1; 3; HOU Lin1; 3; WANG Xiao-ke4; ZHANG Hong-xing4
 (1.College of Forestry,Northwest A&F University,Yangling 712100,Shaanxi,China; 2.Ecological Prediction and Global Climate Change Center,Northwest A&F University,Yangling 712100,Shaanxi,China; 3.Qinling National Forest Ecosystem Research Station,Ankang 711699,Shaanxi,China)
关键词:
 ; 温带森林; 海拔梯度; 秦岭; 温室气体; 全球增温潜势
Keywords:
 ; elevation gradient;  temperate forest;  Qinling Mountains;  greenhouse gas;  global warming potential
分类号:
S714.3
DOI:
10.3969/j.issn.1001-7461.2019.01.01
文献标志码:
A
摘要:
 二氧化碳（CO2）、甲烷（CH4）、氧化亚氮（N2O）是3种主要的温室气体，温带森林土壤是CO2、N2O重要的源，是CH4重要的汇，以前的研究大部分都关注这3种温室气体在时间上的变化，而很少开展在空间变化上的研究。2014年10月至2015年10月，采用静态箱-气相色谱法对秦岭南坡火地塘林区不同海拔(海拔1 560、1 585、1 963、2 040、2 160 m，分别为落叶阔叶林、温性针叶林、温性针叶林、寒温性针叶林、落叶阔叶林)森林土壤CO2、CH4和N2O通量进行了为期1 a的监测。结果表明，CO2全年都为排放，季节波动较大，总体上随海拔增加排放量减少，海拔由低到高（包括3种林型）年排放量依次为：19.12、12.53、11.78、16.95、14.87 t·hm-2；CH4全年主要为吸收，在非生长季出现排放，季节波动幅度较大，总体上随海拔增加吸收量增加，海拔由低到高年通量依次为：-2.57、-3.60、-5.94、-5.59、-3.92 kg·hm-2；N2O全年以排放过程为主，存在吸收现象，季节波动幅度不大，海拔对其通量影响不明显，海拔由低到高年排放量依次为：0.23、0.62、0.63、0.60、0.95 kg·hm-2。土壤温度是影响CO2、N2O通量的关键因子。5个样地森林土壤CO2通量与土壤铵态氮含量(20~40 cm)显著相关（P<0.05）。高的土壤NH4+含量对CH4的吸收有抑制作用。在冻融交替期，降雨对N2O的通量有明显影响。海拔由低到高5个样地的GWP（全球增温潜势）分别为：119.13、12.65、11.85、17.02 t·hm-2和15.07 t·hm-2。
Abstract:
 Carbon dioxide (CO2),methane (CH4) and nitrous oxide (N2O) are the three main greenhouse gases that have large impacts on the global warming.Temperate forest soils are considered as major sources of CO2 and N2O,and also are important sinks for CH4.Although there are increasing number of studies on greenhouse gas fluxes between forest soils and the atmosphere,the majority of these studies focus on the temporal variations of these trace gases.The spatial patterns of these trace gases are still highly uncertain.From October 2014 to October 2015,static chamber and gas chromatography techniques were used to monitor CO2,CH4 and N2O fluxes of the forest soils at 5 elevation sites (1 560,1 585,1 963,2 040,and 2 160 m，the corresponding forest types including deciduous broad-leaved,temperate coniferous,temperate coniferous,cold temperate coniferous and deciduous broad-leaved forests) in Huoditang Forest Region on the southern slope of the Qinling Mountains.The results showed that CO2 emitted from the five elevation sites throughout the year.The seasonal CO2 emissions varied widely.Generally,the annual cumulative CO2 emissions decreased with the increase of the elevation.The annual cumulative CO2 from low to high elevation sites (including three forest types) were as follows:19.12,12.53,11.78,16.95 and 14.87 t·hm-2.At most of the sampling times,CH4 consumptions were monitored.However,several times of CH4 emissions were also found.The seasonal CH4 fluxes varied widely.In general,the annual cumulative CH4 consumption increased with the increase of the elevation.The annual cumulative CH4 consumption from low to high elevation sites were as follows:-2.57,-3.60,-5.94,-5.59 and -3.92 kg·hm-2.At the five elevation sites,N2O emitted throughout the year.However,several times of N2O consumption were also detected.The annual cumulative N2O from low to high elevation sites were as follows:0.23,0.62,0.63,0.60,0.95 kg·hm-2.Soil temperature was identified as the key factor determining the temporal variability of CO2 and N2O fluxes.There was significant correlation between CO2 flux and soil ammonium content (20-40 cm) (P<0.05) at all the five elevation sites.The high soil nitrate content had an inhibiting effect on CH4 consumptions.During freezing and thawing period,rainfall had significant impact on the flux of N2O.From low to high elevations,the global warming potential (GWP) of the five sites were as follows:119.13,12.65,11.85,17.02 and 15.07 t·hm-2.

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备注/Memo

备注/Memo:
 收稿日期：2018-03-21修回日期：2018-04-22
基金项目：国家自然科学基金项目（41101182）；西北农林科技大学基本科研业务费(Z109021106)；西北农林科技大学博士科研启动基金项目（Z109021102）。
作者简介：刘岳坤，男，硕士，研究方向：森林生态系统土壤温室气体通量。E-mail：1515591334@qq.com
*通信作者：庞军柱，男，博士，讲师，研究方向：森林生态系统碳氮循环和温室气体排放。E-mail：pangjunzhu@126.com
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