干旱区生态环境知识资源中心(Arid): Quantifying water productivity and nitrogen uptake of maize under water and nitrogen stress in arid Northwest China

Arid

DOI	10.1016/j.agwat.2023.108370
	Quantifying water productivity and nitrogen uptake of maize under water and nitrogen stress in arid Northwest China
	Ran, Junjun; Ran, Hui; Ma, Longfei; Jennings, Stewart A.; Yu, Tinggao; Deng, Xin; Yao, Ning; Hu, Xiaotao
通讯作者	Ran, H
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	285
英文摘要	Water and nitrogen (N) are critical determinants of crop water productivity (WP) and N uptake (Nuptake), and are also key factors in crop modelling. Through a two-year field experiment with three irrigation levels (full irrigation (W1), moderate water stress (W0.75), and severe water stress (W0.5)), three N application rates (150, 75, and 0 kg N ha(-1), i.e., N150, N75, and N0) and three replications for each treatment in Northwest China, we quantified the effects of water and N stress on the growth, yield, and water and N use efficiency (WP and NUE) of hybrid seed maize (Zea mays L. cv. Tianruifeng). Furthermore, nonlinear dynamic water productivity (WP) models and water (ET)-based N-uptake models were developed. The results showed that water stress had a larger impact than N stress on the growth and yield of maize, with water stress reducing yield (Y), final aboveground biomass (B), and N uptake by 36.5%, 15.4%, and 25.7% on average, respectively, and N stress decreasing them by 18.7%, 12.3%, and 13.6%, respectively. Biomass-based water productivity (WPB-ET) and yield-based water productivity (WPY-ET) at the end of the growth period responded differently to water stress but similarly to N stress because of a higher decrease of harvest index (HI) under water stress than under N stress. Specifically, WPYET decreased significantly while WPB-ET kept relatively stable as water stress increased. The variation of the measured WP during the growth period presented a single peak trend. The Logistic, Sigmoid, and Linear models showed similar high accuracy for quantifying the relationship between evapotranspiration accumulation and biomass growth. However, the derived WP values from the nonlinear dynamic models were more in line with the single peak variation of the measured WP during the growth period, with the agreement index (d) improved from 0.21 to 0.65-0.75 in comparison to the Linear model. The developed ET-based N accumulation models can quantify N uptake through evapotranspiration. The results can contribute to improving the accuracy of crop modelling under drought stress conditions, and the design of irrigation and N management in arid and semi-arid regions.
英文关键词	Plant water relationship Nitrogen dilution curve Nitrogen use efficiency Stress Water productivity model Nitrogen uptake model
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001012843600001
WOS关键词	USE EFFICIENCY ; DEFICIT IRRIGATION ; SEED PRODUCTION ; YIELD RESPONSE ; GRAIN-YIELD ; AQUACROP ; CORN ; PARAMETERIZATION ; ENVIRONMENT ; GROWTH
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395072
推荐引用方式 GB/T 7714	Ran, Junjun,Ran, Hui,Ma, Longfei,et al. Quantifying water productivity and nitrogen uptake of maize under water and nitrogen stress in arid Northwest China[J],2023,285.
APA	Ran, Junjun.,Ran, Hui.,Ma, Longfei.,Jennings, Stewart A..,Yu, Tinggao.,...&Hu, Xiaotao.(2023).Quantifying water productivity and nitrogen uptake of maize under water and nitrogen stress in arid Northwest China.AGRICULTURAL WATER MANAGEMENT,285.
MLA	Ran, Junjun,et al."Quantifying water productivity and nitrogen uptake of maize under water and nitrogen stress in arid Northwest China".AGRICULTURAL WATER MANAGEMENT 285(2023).