干旱区生态环境知识资源中心(Arid): 西北干旱区绿洲葡萄园净碳交换及其影响因素

Arid

	西北干旱区绿洲葡萄园净碳交换及其影响因素
其他题名	Net carbon exchange and its influencing factors of the oasis vineyard in Chinas northwest arid region
	张扬; 朱高峰; 秦文华; 赵楠; 陈惠玲
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2021
卷号	38 期号:3 页码:1001-4675
中文摘要	研究干旱区绿洲农业生态系统碳收支动态和其碳源汇形成机制对于指导绿洲农业固碳减排至关重要。基于敦煌干旱绿洲葡萄园涡度相关系统观测的CO_2通量和相关环境因子数据,估算2019年生长季(510月)葡萄园的碳收支总量,同时探究净生态系统碳交换(NEE)的日、季动态及其对叶面积指数(LAI)、光合有效辐射(PAR)、水汽压差(VPD)和空气温度(Ta)等的响应。结果表明:(1)生长季期间,葡萄园净生态系统碳交换(NEE)、生态系统呼吸(Re)和总初级生产力(GPP)的累计量分别为-647.3、883.2 g C·m~(-2)和1530.5 g C·m~(-2),Re/GPP值为57.7%,表明其碳消耗强度较低,为强烈的碳汇过程。(2)生长季NEE量变化呈单峰型(7月峰值),与空气温度的季节变化相似。这表明在水分供应充足的基本条件下,空气温度对于NEE具有显著影响。(3)生长季NEE受到LAI、PAR、VPD、Ta等生物物理因素的综合作用,在整个生长季PAR是与其相关性最高的环境因子,通过驱动光合作用增加固碳量;生长季LAI先增加后减少,光合固碳量也相应受到影响,进而造成NEE呈先下降后上升趋势。同时,保持VPD处于适宜的范围(20~35 hPa),可有效地提高其固碳能力。
英文摘要	Studying carbon budget dynamics and the formation mechanism of carbon sources and sinks in the oasiss agricultural ecosystem in Chinas northwest arid region are crucial. Carbon oxide (CO_2) fluxes were measured from May to October during the growing season of the arid oasis vineyard in Dunhuang using the eddy covariance system. Based on the CO_2 fluxes and data of relevant environmental factors, carbon exchange cumulative values, the net ecosystem exchange (NEE) dynamics, response to leaf area index (LAI), photosynthetically active radiation (PAR), water vapor deficiency (VPD), and air temperature (Ta) in the vineyard were estimated. Results obtained showed that during the growing season, the total cumulative amount of net ecosystem exchange (NEE), ecosystem respiration (Re), and gross primary productivity (GPP) were -647.3, 883.2, and 1530.5 g C·m~(-2), respectively. Re/GPP value was 57.7%, indicating a slightly lower carbon consumption intensity and an intense carbon sink process. During the growing season, NEE showed a single peak change and peaked in July; this is similar to the seasonal variation in air temperature. This indicated that air temperature significantly affected NEE under the primary conditions of sufficient water supply. During the growing season, NEE was affected by biophysical factors such as LAI, PAR, VPD, and Ta. PAR was the most relevant environmental factor, increasing carbon sequestration by driving the photosynthesis of vines. LAI increased initially and then decreased during the growing season, causing the photosynthetic carbon sequestration to be affected accordingly; NEE also decreased initially and then increased. Keeping VPD in a suitable range (20-35 hPa) could effectively improve the carbon sequestration capacity of vines.
中文关键词	绿洲葡萄园 ; 涡度相关系统 ; 净生态系统碳交换 ; 影响因素
英文关键词	the vineyard of oasis eddy covariance system net ecosystem exchange influencing factors
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6983648
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365067
作者单位	张扬, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.; 朱高峰, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.; 秦文华, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.; 赵楠, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.; 陈惠玲, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	张扬,朱高峰,秦文华,等. 西北干旱区绿洲葡萄园净碳交换及其影响因素[J]. 兰州大学,2021,38(3):1001-4675.
APA	张扬,朱高峰,秦文华,赵楠,&陈惠玲.(2021).西北干旱区绿洲葡萄园净碳交换及其影响因素.干旱区研究,38(3),1001-4675.
MLA	张扬,et al."西北干旱区绿洲葡萄园净碳交换及其影响因素".干旱区研究 38.3(2021):1001-4675.