干旱区生态环境知识资源中心(Arid): 毛乌素沙地人工长柄扁桃灌丛生态系统CO

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	毛乌素沙地人工长柄扁桃灌丛生态系统CO_2通量特征
其他题名	CO_2 flux characteristics of an artificial Amygdalus pedunculata Pall.shrubland ecosystem in Mu Us Desert,China
	孙树臣; 邵明安
来源期刊	应用与环境生物学报
ISSN	1006-687X
出版年	2021
卷号	27 期号:2 页码:1006-687X
中文摘要	人工灌丛作为陆地生态系统的重要组成部分,在区域碳循环及改善区域生态环境方面具有重要作用,开展人工灌丛生态系统CO_2通量特征研究对于合理评估人工灌丛生态系统具有重要意义.采用涡度相关技术于2015年8月至2016年8月对毛乌素沙地东南缘人工长柄扁桃灌丛生态系统净CO_2交换量(NEE)进行测定,分析其变化规律并探讨其影响因素.结果显示,人工长柄扁桃灌丛生态系统NEE在生长季表现为W形变化趋势,各月日均NEE表现为U型变化.生长季(4-9月)NEE值呈先降低后增加的变化趋势,5月碳吸收量最多,日吸收量最大值也出现在5月,生长季末期(9月)变为碳排放.观测期内日均NEE为-0.18 mumol m~(-2) s~(-1),生长季总的碳吸收量(以C计)为158.10 g/m~2,非生长季(10月至次年3月)总的碳排放量为84.59 g/m~2.生长季白天,NEE与净辐射(R_n)表现为极显著负相关关系,与大气温度(T_a)、5 cm(T_(s-5))和10 cm(T_(s-10))土壤温度呈极显著二次函数关系;夜间,NEE与T_a、T_(s-5)和T_(s-10)均表现为极显著的指数函数关系.本研究表明观测期内毛乌素沙地人工长柄扁桃灌丛生态系统总的NEE(以C计)为-73.51 g/m~2,表现为明显的碳汇,人工灌丛生态系统有利于提升毛乌素沙区碳汇能力.
英文摘要	As an important part of terrestrial ecosystems,the artificial shrub ecosystem plays an important role in the regional carbon cycle and improvement of the regional ecological environment.The study of CO_2 flux characteristics of artificial shrub ecosystems is of great significance for the rational evaluation of artificial shrub ecosystems.From August 2015 to August 2016,an eddy covariance system was used to measure the net CO_2 exchange(NEE)of the artificial Amygdalus pedunculata Pall.shrub ecosystem in the southeastern margin of the Mu Us Desert,and the variation and influencing factors of NEE were analyzed.The results showed that NEE showed a W type trend during the growth season,and the monthly average daily change of NEE showed a U type trend.NEE showed a trend of first decreasing and then increasing during the growing season(April to September).Carbon uptake was the highest in May,and the maximum daily uptake also occurred in May,whereas at the end of the growing season(September),the ecosystem became a carbon source.During the observation period,the average daily NEE was -0.18 mumol m~(-2) s~(-1),and the total carbon absorption and emission(in terms of C)were 158.10 g/m~2 and 84.59 g/m~2 during the growing and non-growing seasons,respectively.During the growing season,daytime NEE was negatively correlated with net radiation,and had a highly significant quadratic relationship with air temperature(T_a)and soil temperature at depths of 5(T_(s-5))and 10(T_(s-10))cm.At night,NEE showed a highly significant exponential relationship with T_a,T_(s-5),and T_(s-10).This study shows that total NEE(in terms of C)of the artificial A.pedunculata Pall.shrub ecosystem in the Mu Us Desert during the observation period was -73.51 g/m~2,which indicates that it is a significant carbon sink.The artificial shrub ecosystem is therefore beneficial for the improvement of the carbon sink capacity of the Mu Us Desert.
中文关键词	人工灌丛生态系统 ; CO_2通量 ; 涡度相关 ; 毛乌素沙地
英文关键词	artificial shrub ecosystem CO_2 flux eddy covariance Mu Us Desert
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6965344
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365380
作者单位	孙树臣, 聊城大学环境与规划学院, 聊城, 山东 252059, 中国.; 邵明安, 中国科学院水利部水土保持研究所;;中国科学院地理科学与资源研究所;;中国科学院大学资源与环境学院, 黄土高原土壤侵蚀与旱地农业国家重点实验室;;;;, 杨凌;;;;, ;;北京;;北京 712100;;100101;;100049.
推荐引用方式 GB/T 7714	孙树臣,邵明安. 毛乌素沙地人工长柄扁桃灌丛生态系统CO_2通量特征[J],2021,27(2):1006-687X.
APA	孙树臣,&邵明安.(2021).毛乌素沙地人工长柄扁桃灌丛生态系统CO_2通量特征.应用与环境生物学报,27(2),1006-687X.
MLA	孙树臣,et al."毛乌素沙地人工长柄扁桃灌丛生态系统CO_2通量特征".应用与环境生物学报 27.2(2021):1006-687X.