Co-regulation of temperature and moisture in the irrigated agricultural ecosystem productivity
Wang, Chunyu ; Li, Sien ; Wu, Mousong LU ; Zhang, Wenxin LU
; Guo, Zhenyu
; Huang, Siyu
and Yang, Danni
(2023)
In Agricultural Water Management
275.
- Abstract
Agroecosystem photosynthesis is key to coping with global climate change. In farmland where human activities are highly involved, the interaction between environmental factors and their influences on gross primary productivity (GPP) are insufficiently understood. Particularly, the irrigation and mulching in water-saving agriculture can alter the crop responses to environmental change. Based on eddy covariance measurements of maize fields under mulched drip irrigation (DM) and mulched border irrigation (BM) in arid areas of Northwest China from 2014 to 2018, we systematically studied the interaction between multiple environmental factors and their independent effects on GPP using structural equation modeling, partial correlation... (More)
Agroecosystem photosynthesis is key to coping with global climate change. In farmland where human activities are highly involved, the interaction between environmental factors and their influences on gross primary productivity (GPP) are insufficiently understood. Particularly, the irrigation and mulching in water-saving agriculture can alter the crop responses to environmental change. Based on eddy covariance measurements of maize fields under mulched drip irrigation (DM) and mulched border irrigation (BM) in arid areas of Northwest China from 2014 to 2018, we systematically studied the interaction between multiple environmental factors and their independent effects on GPP using structural equation modeling, partial correlation coefficient and decoupling analysis by bins. The top three factors exerting the largest total effects on the GPP were soil temperature (Ts), canopy temperature (Tc) and vapor pressure deficit (VPD), among which Ts (0.75) and Tc (0.66) had the largest total effect on GPP under DM and BM, respectively. The independent effects of Ts, soil water content (SWC) and VPD on GPP were different under the two irrigation methods. SWC after excluding the influence of Ts showed a negative effect on GPP under DM (−1.24 g Cm−2d−1), while a positive effect under BM (0.02 g Cm−2d−1). By contrast, SWC after excluding the influence of VPD showed a positive effect on GPP under DM (0.59 g Cm−2d−1), while a negative effect under BM (−0.05 g Cm−2d−1). Interestingly, higher Ts, lower SWC and higher VPD had the potential to increase GPP under the two irrigation methods. We also found that the total effects of irrigation and VPD as well as the indirect effects of environmental factors on GPP should not be ignored. Our study will provide important reference for dealing with the effect of high temperature and drought stress on agro-ecosystem GPP and evaluating the response of vegetation to environmental factors.
(Less)
- author
- Wang, Chunyu
; Li, Sien
; Wu, Mousong
LU
; Zhang, Wenxin
LU
; Guo, Zhenyu
; Huang, Siyu
and Yang, Danni
- organization
- publishing date
- 2023-01-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Decoupling, Gross primary productivity, Soil temperature, Soil water content, Vapor pressure deficit
- in
- Agricultural Water Management
- volume
- 275
- article number
- 108016
- publisher
- Elsevier
- external identifiers
-
- scopus:85141309245
- ISSN
- 0378-3774
- DOI
- 10.1016/j.agwat.2022.108016
- language
- English
- LU publication?
- yes
- additional info
- Funding Information: This work was financially supported by the National Key Research and Development Program of China ( 2020YFA0607504 , 2016YFA0600204 ), the National Natural Science Foundation of China ( 51879262 , 41901266 , 42111530184 ), 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
- id
- 16f6cf47-72ee-449c-a4c3-2bb92520b3c9
- date added to LUP
- 2022-11-23 22:02:26
- date last changed
- 2023-01-24 17:27:55
@article{16f6cf47-72ee-449c-a4c3-2bb92520b3c9,
abstract = {{<p>Agroecosystem photosynthesis is key to coping with global climate change. In farmland where human activities are highly involved, the interaction between environmental factors and their influences on gross primary productivity (GPP) are insufficiently understood. Particularly, the irrigation and mulching in water-saving agriculture can alter the crop responses to environmental change. Based on eddy covariance measurements of maize fields under mulched drip irrigation (DM) and mulched border irrigation (BM) in arid areas of Northwest China from 2014 to 2018, we systematically studied the interaction between multiple environmental factors and their independent effects on GPP using structural equation modeling, partial correlation coefficient and decoupling analysis by bins. The top three factors exerting the largest total effects on the GPP were soil temperature (Ts), canopy temperature (Tc) and vapor pressure deficit (VPD), among which Ts (0.75) and Tc (0.66) had the largest total effect on GPP under DM and BM, respectively. The independent effects of Ts, soil water content (SWC) and VPD on GPP were different under the two irrigation methods. SWC after excluding the influence of Ts showed a negative effect on GPP under DM (−1.24 g Cm<sup>−2</sup>d<sup>−1</sup>), while a positive effect under BM (0.02 g Cm<sup>−2</sup>d<sup>−1</sup>). By contrast, SWC after excluding the influence of VPD showed a positive effect on GPP under DM (0.59 g Cm<sup>−2</sup>d<sup>−1</sup>), while a negative effect under BM (−0.05 g Cm<sup>−2</sup>d<sup>−1</sup>). Interestingly, higher Ts, lower SWC and higher VPD had the potential to increase GPP under the two irrigation methods. We also found that the total effects of irrigation and VPD as well as the indirect effects of environmental factors on GPP should not be ignored. Our study will provide important reference for dealing with the effect of high temperature and drought stress on agro-ecosystem GPP and evaluating the response of vegetation to environmental factors.</p>}},
author = {{Wang, Chunyu and Li, Sien and Wu, Mousong and Zhang, Wenxin and Guo, Zhenyu and Huang, Siyu and Yang, Danni}},
issn = {{0378-3774}},
keywords = {{Decoupling; Gross primary productivity; Soil temperature; Soil water content; Vapor pressure deficit}},
language = {{eng}},
month = {{01}},
publisher = {{Elsevier}},
series = {{Agricultural Water Management}},
title = {{Co-regulation of temperature and moisture in the irrigated agricultural ecosystem productivity}},
url = {{http://dx.doi.org/10.1016/j.agwat.2022.108016}},
doi = {{10.1016/j.agwat.2022.108016}},
volume = {{275}},
year = {{2023}},
}