干旱区生态环境知识资源中心(Arid): Maize transpiration and water productivity of two irrigated fields with varying groundwater depths in an arid area

Arid

DOI	10.1016/j.agrformet.2019.107849
	Maize transpiration and water productivity of two irrigated fields with varying groundwater depths in an arid area
	Wang, Xingwang 1; Guan, Huade 2; Huo, Zailin 1; Guo, Ping 1; Du, Jiali 1; Wang, Weishu 1
通讯作者	Huo, Zailin
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2020
卷号	281
英文摘要	A better understanding of crop transpiration and its influencing factors in arid areas where irrigation is required contributes to improving agricultural water productivity and water resources management. However, previous studies from different regions have not come to a consensus on which factors and how they control crop transpiration, and little is known for areas with a shallow groundwater table. In this study, maize (Zea mays L.) transpiration was investigated under two groundwater table depths (WTDs) during two growing seasons. Sap velocity (SV), micrometeorological conditions and water regimes were monitored to evaluate transpiration rates under different WTDs and their relationships to environmental and hydrologic conditions. Results show that the combination of photosynthetic active radiation (PAR) and vapor pressure deficit (VPD) mainly controlled the diurnal dynamics of SV. PAR better explained the temporal variability of transpiration than solar radiation at hourly scale. At daily scale, the two-segment transpiration response to VPD was observed, suggesting that the studied species likely has a capacity of drought-tolerance. On average, SV was found to be larger during midday for the shallower WTD in 2016 than the deeper one. For different seasons, the shallower WTD in 2017 also led to larger transpiration than the deeper one in 2016. Given similar yields for all cases, the maize field with the deeper WTD in 2016 was estimated to have higher water productivity. An optimum water use efficiency WTD was determined by assessing the normalized transpiration difference with the varying WTD and it was about 2.1-2.2 m for maize in this area. These results shed light on the most effective utilization of the valuable water confronting the changing climate in arid areas with shallow groundwater.
英文关键词	Maize transpiration Meteorological variables Shallow groundwater Water productivity Optimum WTD
类型	Article
语种	英语
国家	Peoples R China ; Australia
收录类别	SCI-E
WOS记录号	WOS:000525808600027
WOS关键词	ALTERNATE FURROW IRRIGATION ; VAPOR-PRESSURE DEFICIT ; SAP-FLOW ; ENVIRONMENTAL-FACTORS ; TABLE FLUCTUATIONS ; USE EFFICIENCY ; SOIL-MOISTURE ; RESPONSES ; GROWTH ; HETAO
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313920
作者单位	1.China Agr Univ, Ctr Agr Water Res China, Beijing, Peoples R China; 2.Flinders Univ S Australia, Coll Sci & Engn, Natl Ctr Groundwater Res & Training, Adelaide, SA, Australia
推荐引用方式 GB/T 7714	Wang, Xingwang,Guan, Huade,Huo, Zailin,et al. Maize transpiration and water productivity of two irrigated fields with varying groundwater depths in an arid area[J]. 中国农业大学,2020,281.
APA	Wang, Xingwang,Guan, Huade,Huo, Zailin,Guo, Ping,Du, Jiali,&Wang, Weishu.(2020).Maize transpiration and water productivity of two irrigated fields with varying groundwater depths in an arid area.AGRICULTURAL AND FOREST METEOROLOGY,281.
MLA	Wang, Xingwang,et al."Maize transpiration and water productivity of two irrigated fields with varying groundwater depths in an arid area".AGRICULTURAL AND FOREST METEOROLOGY 281(2020).