干旱区生态环境知识资源中心(Arid): 新疆绿洲覆膜滴灌棉田碳通量特征研究

Arid

	新疆绿洲覆膜滴灌棉田碳通量特征研究
其他题名	Carbon Fluxes in Cotton Field with Plastic Mulched Drip Irrigation in Xinjiang Oasis
	王进 1; 白洁 2; 陈曦2 ; 罗格平2 ; 王绍明 1
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2015
卷号	46 期号:2 页码:70-78,136
中文摘要	基于涡度相关技术,对新疆典型绿洲棉田进行了连续4年的碳通量观测,并探讨覆膜滴灌棉田生育期内碳通量的构成和特征。结果表明:生长盛期(6-9月),棉田的总初级生产力(GPP)和净生态系统碳交换(NEE)日变化明显,峰值约出现在14:00。生态系统呼吸(R_(es))日变化稳定,与膜下土壤温度日变化稳定有关。日间GPP随太阳净辐射(R_(net))增加而增大,可用直角双曲线方程描述;且最大光合速率的峰值出现在7月。各碳通量的季节变化不同:GPP和NEE与LAI的季节变化一致,峰值出现在7月;而R_(es)的峰值出现在6月。月累积GPP在6-9月间主要分配给NEE;而其余月份则分配给R_(es)。整个生育期内(5-10月),总GPP平均为816.2 gC/m~2,其中NEE占58.6%,这表明生育期内覆膜滴灌棉田表现为碳汇。
英文摘要	Carbon and water fluxes of cotton field with plastic mulched drip irrigation were measured using an eddy covariance (EC) technique in 2009, 2010, 2012 and 2013 at Wulanwusu experimental station, which was a representatively agricultural oasis in northern Xinjiang. The diurnal pattern of mean monthly gross primary production (GPP) and net ecosystem exchange (NEE) showed an obviously sinusoidal dynamic from June to September, whilst that of ecosystem respiration (R_(es)) stayed low and stable between daytime and nighttime. The response of daytime hourly GPP to net solar radiation (R_(net)) could be expressed by a rectangular hyperbolic function. The variations of maximal assimilation rate (A) were followed changes in LAI, and the peak value occurred in July. The seasonal variations of GPP and NEE were close to the cotton phenology, and they almost reached the peak value in July. However, seasonal variations of R_(es) didn’t follow that of LAI, and the maximum value occurred nearly one month earlier than that of LAI. Seasonal NEE showed a carbon sink from squaring to harvest period, whilst it indicated a carbon source before the squaring time as well as after the harvest time. The cumulative GPP averaged 816.2 gC/m ~2 during the growing season (from April to October), and more than half of GPP was partitioned into NEE (meanly -478.6 gC/m ~2).
中文关键词	覆膜滴灌 ; 棉田 ; 涡度相关 ; 净生态系统碳交换 ; 总初级生产力
英文关键词	Plastic mulching and drip irrigation Cotton field Eddy covariance Net ecosystem exchange Gross primary production
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5358380
来源机构	中国科学院新疆生态与地理研究所 ; 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/2XILL650/233062
作者单位	1.石河子大学, 新疆生产建设兵团绿洲生态农业重点实验室, 石河子, 新疆 832003, 中国; 2.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	王进,白洁,陈曦,等. 新疆绿洲覆膜滴灌棉田碳通量特征研究[J]. 中国科学院新疆生态与地理研究所, 石河子大学,2015,46(2):70-78,136.
APA	王进,白洁,陈曦,罗格平,&王绍明.(2015).新疆绿洲覆膜滴灌棉田碳通量特征研究.农业机械学报,46(2),70-78,136.
MLA	王进,et al."新疆绿洲覆膜滴灌棉田碳通量特征研究".农业机械学报 46.2(2015):70-78,136.