干旱区生态环境知识资源中心(Arid): Crop coefficient for spring maize under plastic mulch based on 12-year eddy covariance observation in the arid region of Northwest China

Arid

DOI	10.1016/j.jhydrol.2020.125108
	Crop coefficient for spring maize under plastic mulch based on 12-year eddy covariance observation in the arid region of Northwest China
	Guo, Hui; Li, Sien; Kang, Shaozhong; Du, Taisheng; Tong, Ling; Hao, Xinmei; Ding, Risheng
通讯作者	Li, SE
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	588
英文摘要	Water resource is an irreplaceable natural resource for the development of human society. As a key parameter of irrigation scheduling, crop coefficient has an important reference value for precision irrigation and water-saving in agriculture. Although crop coefficient method proposed by FAO has been verified in many areas and crops, how the crop coefficient varied during a long period and whether it was stable during different years remain uncertain. We investigated the maize evapotranspiration (ETc), reference evapotranspiration (ET0) and crop coefficient (K-c) under film mulch in northwest China through a 12-year crop evapotranspiration observation by using the eddy covariance system. From 2007 to 2018, the annual average ETc was 481.68 mm and the annual average ET0 was 551.48 mm. To our surprise, not only the interannual variation in ETc and ET0 was small over a 12-year period, the average crop coefficient remained more stable over a long period. The mean annual K-c was 0.88, and the coefficient of variation was only 12.18%. In the whole process of crop growth and development, crop coefficient advised by FAO (Kc-FAO) can reflect the variation of observed crop coefficient (Kc-loc), and K-C-(FAO) is only 7% higher than Kc-loc. The K-c, LAI and GDD were fitted by cubic polynomials, and the determination coefficient (R-2) were 0.74 and 0.75 respectively. Our study demonstrates the stability of maize crop coefficient, the close relation between crop coefficient with LAI and GDD, and the high reliability of the crop coefficient modelling method advised by FAO. This study provides an important scientific basis for the practice of agricultural irrigation management.
英文关键词	Crop coefficient Maize Evapotranspiration Film mulching Border irrigation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568826300043
WOS关键词	IRRIGATED COTTON ; WINTER-WHEAT ; WATER-USE ; EVAPOTRANSPIRATION ; DRIP ; YIELD
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
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/2XILL650/326246
作者单位	[Guo, Hui; Li, Sien; Kang, Shaozhong; Du, Taisheng; Tong, Ling; Hao, Xinmei; Ding, Risheng] China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; [Guo, Hui; Li, Sien; Kang, Shaozhong; Du, Taisheng; Tong, Ling; Hao, Xinmei; Ding, Risheng] Minist Agr & Rural Affairs, Shiyanghe Expt Stn Improving Water Use Efficiency, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Guo, Hui,Li, Sien,Kang, Shaozhong,et al. Crop coefficient for spring maize under plastic mulch based on 12-year eddy covariance observation in the arid region of Northwest China[J]. 中国农业大学,2020,588.
APA	Guo, Hui.,Li, Sien.,Kang, Shaozhong.,Du, Taisheng.,Tong, Ling.,...&Ding, Risheng.(2020).Crop coefficient for spring maize under plastic mulch based on 12-year eddy covariance observation in the arid region of Northwest China.JOURNAL OF HYDROLOGY,588.
MLA	Guo, Hui,et al."Crop coefficient for spring maize under plastic mulch based on 12-year eddy covariance observation in the arid region of Northwest China".JOURNAL OF HYDROLOGY 588(2020).