干旱区生态环境知识资源中心(Arid): 新疆高产棉田生态系统NEE变化及其影响因素

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	新疆高产棉田生态系统NEE变化及其影响因素
其他题名	Net ecosystem exchange changes of agricultural ecosystem and its influencing factors in Xinjiang
	蔡旭; 张凤华; 杨海昌
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2016
卷号	30 期号:7 页码:59-64
中文摘要	温室气体大量排放使得全球变暖已成为世界公认的热点问题之一。农田生态系统在全球碳循环与碳平衡中扮演着重要的角色。文中运用开路式涡度相关测量系统进行定点定位观测,研究干旱区农田生态系统/大气间净交换量(Net Ecosystem Exchange),分析农田生态系统中碳源/汇功能的关系。结果表明:新疆棉田生态系统在现蕾期、开花期与铃期CO_2通量日变化呈现出单峰型的" U"型曲线,现蕾期、开花期和铃期CO_2通量最高点在凌晨3: 00、4: 00和1: 00,分别为9.45、8.78和7.68umol?m~(-2)?s~(-1),CO_2通量最低点在正午14: 00、15: 00和15: 00,依次为- 19.35、- 21.73和- 20.51umol?m~(-2)?s~(-1)。不同生育期夜晚NEE值均负值,表明棉田生态系统夜间处于碳排放过程; 白天正值,棉田生态系统为碳吸收过程。棉花不同生育期均为碳储存,且开花期碳储量最大,平均值为- 7.26g?m~(-2)?d~(- 1),其次是现蕾期,平均值为- 6.31g?m~(-2)?d~(- 1),铃期平均值为- 5.37g?m~(-2)?d~(- 1)。温度和降雨对棉田生态系统碳储量影响显著。研究结果表明干旱区高产棉田生态系统有着较好的碳储量,是一个碳汇过程。
英文摘要	Greenhouse gas cause the global warming has become a big problem in the world. Farmland ecosystem play an important role in carbon cycle and carbon balance. In this research we used the Open Eddy Covariance to do an insitu observation,and did some research about NEE(Net Ecosystem Exchange),analyzed the relationship between carbon source and sink of farmland ecosystem. The results showed that in cotton field ecosystem the NEE variations were the U - shape curve in budding stage,flowering stage and bolling stage; the biggest NEE appeared at 3: 00 AM,4: 00AM and 1: 00AM for budding stage,flowering stage and bolling stage,and there were 9.45umol?m~(-2)?s~(-1),8.78umol?m~(-2)?s~(-1),and 7.68umol?m~(-2)?s~(-1); the lowest NEE appeared at 14: 00 PM,15: 00PM and 15: 00PM,there were - 19.35umol?m~(-2)?s~(-1),- 21.73umol?m~(-2)?s~(-1) and - 20.51umol?m~(-2)?s~(-1). The NEE value was negative at night,it showed the cotton fields ecosystem was in the carbon emissions; during the day NEE value was positive,it showed that the cotton fields ecosystem was in the carbon absorption. NEE variation was a " U" type curve for a month,but the change was not big. The three growing stages were all for the carbon storage; the carbon storage in flowering stage was the largest(- 7.26g? m~(-2)?s~(-1)),next was in budding stage (- 6.31g?m~(-2)?s~(-1)),and the bolling stage (- 5.37g?m~(-2)?s~(-1)). Temperature and rainfall had an obvious effect for carbon storage. In arid area’s agricultural ecosystem the carbon storage was obviously a process of carbon sink.
中文关键词	棉田生态系统 ; 碳汇 ; 涡度相关
英文关键词	NEE cotton field ecosystem NEE carbon storage Open Eddy Covariance
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5775133
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234380
作者单位	石河子大学, 新疆兵团绿洲生态农业重点实验室, 石河子, 新疆 832003, 中国
推荐引用方式 GB/T 7714	蔡旭,张凤华,杨海昌. 新疆高产棉田生态系统NEE变化及其影响因素[J]. 石河子大学,2016,30(7):59-64.
APA	蔡旭,张凤华,&杨海昌.(2016).新疆高产棉田生态系统NEE变化及其影响因素.干旱区资源与环境,30(7),59-64.
MLA	蔡旭,et al."新疆高产棉田生态系统NEE变化及其影响因素".干旱区资源与环境 30.7(2016):59-64.