干旱区生态环境知识资源中心(Arid): 黑河中游灌区玉米农田蒸散涡度相关分析研究

Arid

	黑河中游灌区玉米农田蒸散涡度相关分析研究
其他题名	Characteristics and Impact Factors of Evapotranspiration in Maize Field of Irrigation Area in Heihe Middle Reaches
	有德宝 1; 王建林 2; 田平 1; 隋鹏祥 1; 张文可 1; 马立婷 1; 安俊朋 1; 齐华 1
来源期刊	沈阳农业大学学报
ISSN	1000-1700
出版年	2015
卷号	46 期号:6 页码:648-653
中文摘要	农田蒸散是联系作物气孔行为、生态系统水分利用效率的重要生态过程,对农田合理灌溉有重要意义。根据涡度相关系统观测的黑河中游农田生态系统2012年生长季的蒸散数据与气象数据,分析了农田蒸散的日、季节变化,对环境影响因子与农田蒸散的关系进行研究。研究结果表明:试验地在玉米生长季,蒸散日变化呈现早、晚低,中午高的变化特征,但受当地气候影响,正午蒸散值有略微的下降,出现具有蒸散高地现象的单峰型变化曲线;蒸散最大日峰值出现在大喇叭口期,为0.32mm?h~(-1),最低日峰值出现在完熟期,为0.16mm?h~(-1)。农田蒸散季节变化动态明显,与玉米叶面积指数密切相关,呈明显的单峰变化曲线,在抽雄吐丝期达到最高值(91.1mm),在完熟期达到最低值(33.0mm)。土壤温度是农田蒸散最主要的环境控制因子,光合有效辐射、空气温度、空气相对湿度、风速次之,土壤含水量的响应最弱。土壤温度、空气温度、风速和空气相对湿度对农田蒸散的影响主要是直接影响,光合有效辐射主要通过土壤温度和空气温度对农田蒸散产生影响。
英文摘要	Evapotranspiration(ET)is a key ecological process of linking crop stomatal behavior and water use efficiency in the ecosystem. The study of evapotranspiration has important meaning in water resource utilization, crop irrigation scheduling and the improvement of crop yield. An ecological experimental station of hydrological research on maize field was established in Zhangye Oasis in irrigation in Heihe middle reaches. ET and meteorological data was measured continuously in maize growth season(from May to October)in 2012 using the eddy covariance technique. The diurnal and seasonal dynamics of ET and environmental impact factors influencing ET were analyzed. The results showed that the diurnal variation of ET in this agroecosystem can be graphed as a line with a single -peak which occured high in the noon and low in the morning and evening as following the growing stage; while ET declined slightly and a plateau in the evapotranspiration occured during the middle part in the day affected by local climate. Seasonal ET highest peaked in bell-mouthed period(0.32 mm ? h~(-1))and lowest peaked in maturity period(0.16mm?h~(-1)). ET seasonal change was obvious and ET dynamics were closely linked to the irrigation, seasonal distribution of precipitation and Leaf area Index of maize. Seasonal ETpeaked in Tasseling -Silking stage with 91.1mm and reached the lowest 33mm in Maturity stage. Soil temperature(Ts)was the major environmental factor controlling ET in this agroecosystem, followed by photosynthetically active radiation(PAR), air temperature(Ta), relative air humidity(RH)and wind speed(Ws). Soil water content(theta)had no significant influence on seasonal variation of ET. Ts,Ta,Ws, RH affected ET directly, and PAR mainly through the influence of Ts and Taaffected ET.
中文关键词	农田蒸散 ; 环境因子 ; 涡度相关 ; 通径分析 ; 黑河中游灌区
英文关键词	evapotranspiration environmental factors eddy covariance path analysis irrigation area in Heihe Middle Reaches
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:5594515
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233102
作者单位	1.沈阳农业大学, 沈阳, 辽宁 110161, 中国; 2.青岛农业大学, 青岛, 山东 266109, 中国
推荐引用方式 GB/T 7714	有德宝,王建林,田平,等. 黑河中游灌区玉米农田蒸散涡度相关分析研究[J],2015,46(6):648-653.
APA	有德宝.,王建林.,田平.,隋鹏祥.,张文可.,...&齐华.(2015).黑河中游灌区玉米农田蒸散涡度相关分析研究.沈阳农业大学学报,46(6),648-653.
MLA	有德宝,et al."黑河中游灌区玉米农田蒸散涡度相关分析研究".沈阳农业大学学报 46.6(2015):648-653.