Water use efficiency control for a maize field under mulched drip irrigation
Wang, Chunyu ; Li, Sien ; Wu, Mousong LU ; Zhang, Wenxin LU
; He, Hongxing
; Yang, Danni
; Huang, Siyu
; Guo, Zhenyu
and Xing, Xiuli
(2023)
In Science of the Total Environment
857.
- Abstract
Agricultural ecosystem water use efficiency (WUE) is an important indicator reflecting carbon-water coupling, but its control mechanisms in managed fields remain unclear. In order to reveal the influencing factors of WUE in the agricultural field under mulched drip irrigation (DM), we carried out the 8-year continuous observations in a maize field from Northwestern China. The structural equation model, relative importance analysis and principal component analysis were used to quantify the regulation effects of environmental and biological factors on WUE at different time scales, in different growth stages and under different hydrothermal conditions. The results showed that annual WUE varied between 2.18 g C Kg−1... (More)
Agricultural ecosystem water use efficiency (WUE) is an important indicator reflecting carbon-water coupling, but its control mechanisms in managed fields remain unclear. In order to reveal the influencing factors of WUE in the agricultural field under mulched drip irrigation (DM), we carried out the 8-year continuous observations in a maize field from Northwestern China. The structural equation model, relative importance analysis and principal component analysis were used to quantify the regulation effects of environmental and biological factors on WUE at different time scales, in different growth stages and under different hydrothermal conditions. The results showed that annual WUE varied between 2.18 g C Kg−1 H2O and 3.60 g C Kg−1 H2O, with a multi-year mean of 2.91 g C Kg−1 H2O. The total effects of air temperature on the daily WUE in the whole growth period, the vegetative growth stage, the warm and dry years, the cold and wet years, and the warm and wet years were the largest, with values of 0.61, 0.80, 0.70, 0.70 and 0.91 respectively. However, vapor pressure deficit and net radiation had the largest total effect in the cold and dry years (−0.63) and the reproductive growth stage (−0.49), respectively. Leaf biomass played a leading role in regulating the daily and interannual WUE, and the relative importance of leaf biomass to WUE in the vegetative growth stage was up to 75 %. In the warm and wet years, the relative importance of root biomass to WUE was 33 %, slightly higher than that of leaf biomass (31 %). At the same time, we found that Ta has the potential to increase WUE under future climate warming. Our results improve the understanding of carbon-water coupling mechanisms and provide important enlightenment on how crop ecosystems should adapt to future climate change.
(Less)
- author
- Wang, Chunyu
; Li, Sien
; Wu, Mousong
LU
; Zhang, Wenxin
LU
; He, Hongxing
; Yang, Danni
; Huang, Siyu
; Guo, Zhenyu
and Xing, Xiuli
- organization
- publishing date
- 2023-01-20
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Biomass, Ecosystem water use efficiency, Environmental factors, Relative importance analysis, Structural equation model
- in
- Science of the Total Environment
- volume
- 857
- article number
- 159457
- publisher
- Elsevier
- external identifiers
-
- scopus:85140464228
- pmid:36252664
- ISSN
- 0048-9697
- DOI
- 10.1016/j.scitotenv.2022.159457
- language
- English
- LU publication?
- yes
- additional info
- Funding Information: This work was financially supported by the National Natural Science Foundation of China ( 51879262 , 41901266 , 42111530184 ), the National Key Research and Development Program of China ( 2020YFA0607504 , 2016YFA0600204 ), and the Natural Science Foundation of Jiangsu Province ( BK20190317 ). W. Z. was supported by the grants from Swedish Research Council VR ( 2020-05338 ) and Swedish National Space Agency ( 209/19 ). Publisher Copyright: © 2022 Elsevier B.V.
- id
- c6d201b7-1c2e-4599-b983-1de17b9ffa66
- date added to LUP
- 2022-11-23 22:02:54
- date last changed
- 2024-06-13 09:42:01
@article{c6d201b7-1c2e-4599-b983-1de17b9ffa66,
abstract = {{<p>Agricultural ecosystem water use efficiency (WUE) is an important indicator reflecting carbon-water coupling, but its control mechanisms in managed fields remain unclear. In order to reveal the influencing factors of WUE in the agricultural field under mulched drip irrigation (DM), we carried out the 8-year continuous observations in a maize field from Northwestern China. The structural equation model, relative importance analysis and principal component analysis were used to quantify the regulation effects of environmental and biological factors on WUE at different time scales, in different growth stages and under different hydrothermal conditions. The results showed that annual WUE varied between 2.18 g C Kg<sup>−1</sup> H<sub>2</sub>O and 3.60 g C Kg<sup>−1</sup> H<sub>2</sub>O, with a multi-year mean of 2.91 g C Kg<sup>−1</sup> H<sub>2</sub>O. The total effects of air temperature on the daily WUE in the whole growth period, the vegetative growth stage, the warm and dry years, the cold and wet years, and the warm and wet years were the largest, with values of 0.61, 0.80, 0.70, 0.70 and 0.91 respectively. However, vapor pressure deficit and net radiation had the largest total effect in the cold and dry years (−0.63) and the reproductive growth stage (−0.49), respectively. Leaf biomass played a leading role in regulating the daily and interannual WUE, and the relative importance of leaf biomass to WUE in the vegetative growth stage was up to 75 %. In the warm and wet years, the relative importance of root biomass to WUE was 33 %, slightly higher than that of leaf biomass (31 %). At the same time, we found that Ta has the potential to increase WUE under future climate warming. Our results improve the understanding of carbon-water coupling mechanisms and provide important enlightenment on how crop ecosystems should adapt to future climate change.</p>}},
author = {{Wang, Chunyu and Li, Sien and Wu, Mousong and Zhang, Wenxin and He, Hongxing and Yang, Danni and Huang, Siyu and Guo, Zhenyu and Xing, Xiuli}},
issn = {{0048-9697}},
keywords = {{Biomass; Ecosystem water use efficiency; Environmental factors; Relative importance analysis; Structural equation model}},
language = {{eng}},
month = {{01}},
publisher = {{Elsevier}},
series = {{Science of the Total Environment}},
title = {{Water use efficiency control for a maize field under mulched drip irrigation}},
url = {{http://dx.doi.org/10.1016/j.scitotenv.2022.159457}},
doi = {{10.1016/j.scitotenv.2022.159457}},
volume = {{857}},
year = {{2023}},
}