Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions
[Objective] Understanding the dynamics of water and carbon fluxes, as well as water use efficiency (WUE) in ecosystems is crucial for optimizing crop yield and improving resource management. This paper experimentally investigated the seasonal dynamics of these processes in jujube orchards located in...
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Science Press
2025-01-01
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| Series: | Guan'gai paishui xuebao |
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| Online Access: | https://www.ggpsxb.com/jgpxxben/ch/reader/view_abstract.aspx?file_no=20250102&flag=1 |
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| author | QIAO Ying WANG Huanbo CHEN Yunfei KUERBAN ·Aili ZHANG Penghua |
| author_facet | QIAO Ying WANG Huanbo CHEN Yunfei KUERBAN ·Aili ZHANG Penghua |
| author_sort | QIAO Ying |
| collection | DOAJ |
| description | [Objective] Understanding the dynamics of water and carbon fluxes, as well as water use efficiency (WUE) in ecosystems is crucial for optimizing crop yield and improving resource management. This paper experimentally investigated the seasonal dynamics of these processes in jujube orchards located in arid regions in Northwestern China. [Method] Water and carbon fluxes in a jujube orchard were continuously measured during 2018 and 2019 using the eddy covariance technique. The net ecosystem carbon flux (NEE) measured in the experiment was partitioned into ecosystem respiration (Reco) and gross primary productivity (GPP) using the REddyProc package in R. Seasonal variations in water and carbon fluxes, along with WUE, were analysed based on these data. [Result] ① Evapotranspiration showed minimal variation during the dormant period but fluctuated significantly during the reproductive period, with annual total being 657.64 mm/a in 2018 and 677.40 mm/a in 2019. ② Seasonal trends were evident in half-hourly and daily variations in carbon flux components (NEE, GPP, and Reco), remaining stable during dormancy but changing markedly during the growing season. Annually, the orchard acted as a carbon sink, with total NEE being -582.4 and -494.96 g/(m2·a) in 2018 and 2019, respectively. ③ The annual WUE was 2.08 and 1.92 g/kg in 2018 and 2019, respectively, fluctuating during the growing season. It was comparable to the WUE of the forest ecosystems in warm temperate and semi-arid regions but exceeded the WUE of wheat farmland ecosystems. [Conclusion] The seasonal variation in carbon flux in jujube orchards in arid regions is influenced by air temperature, solar radiation, precipitation, irrigation, and crop growth. Annually, the orchard acted as a carbon sink, although it emitted more carbon than it sequestered during non-growing seasons. These findings underscore the importance of managing water and carbon fluxes to improve water use efficiency and productivity of jujube orchards in arid regions. |
| format | Article |
| id | doaj-art-6b0894cbfa5a46edb6a0ae6b243c7f18 |
| institution | Kabale University |
| issn | 1672-3317 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Science Press |
| record_format | Article |
| series | Guan'gai paishui xuebao |
| spelling | doaj-art-6b0894cbfa5a46edb6a0ae6b243c7f182025-01-16T07:30:52ZzhoScience PressGuan'gai paishui xuebao1672-33172025-01-0144181610.13522/j.cnki.ggps.20240751672-3317(2025)01-0008-09Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regionsQIAO Ying0WANG Huanbo1CHEN Yunfei2KUERBAN ·Aili3ZHANG Penghua4Xinjiang Institute of Technology, Aksu 843100, ChinaXinjiang Vocational University, Urumqi 830013, ChinaNeijiang Normal University, Neijiang 641112, ChinaXinjiang Institute of Technology, Aksu 843100, ChinaXinjiang Institute of Technology, Aksu 843100, China[Objective] Understanding the dynamics of water and carbon fluxes, as well as water use efficiency (WUE) in ecosystems is crucial for optimizing crop yield and improving resource management. This paper experimentally investigated the seasonal dynamics of these processes in jujube orchards located in arid regions in Northwestern China. [Method] Water and carbon fluxes in a jujube orchard were continuously measured during 2018 and 2019 using the eddy covariance technique. The net ecosystem carbon flux (NEE) measured in the experiment was partitioned into ecosystem respiration (Reco) and gross primary productivity (GPP) using the REddyProc package in R. Seasonal variations in water and carbon fluxes, along with WUE, were analysed based on these data. [Result] ① Evapotranspiration showed minimal variation during the dormant period but fluctuated significantly during the reproductive period, with annual total being 657.64 mm/a in 2018 and 677.40 mm/a in 2019. ② Seasonal trends were evident in half-hourly and daily variations in carbon flux components (NEE, GPP, and Reco), remaining stable during dormancy but changing markedly during the growing season. Annually, the orchard acted as a carbon sink, with total NEE being -582.4 and -494.96 g/(m2·a) in 2018 and 2019, respectively. ③ The annual WUE was 2.08 and 1.92 g/kg in 2018 and 2019, respectively, fluctuating during the growing season. It was comparable to the WUE of the forest ecosystems in warm temperate and semi-arid regions but exceeded the WUE of wheat farmland ecosystems. [Conclusion] The seasonal variation in carbon flux in jujube orchards in arid regions is influenced by air temperature, solar radiation, precipitation, irrigation, and crop growth. Annually, the orchard acted as a carbon sink, although it emitted more carbon than it sequestered during non-growing seasons. These findings underscore the importance of managing water and carbon fluxes to improve water use efficiency and productivity of jujube orchards in arid regions.https://www.ggpsxb.com/jgpxxben/ch/reader/view_abstract.aspx?file_no=20250102&flag=1arid areasjujube forestswater-carbon fluxwater use efficiency |
| spellingShingle | QIAO Ying WANG Huanbo CHEN Yunfei KUERBAN ·Aili ZHANG Penghua Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions Guan'gai paishui xuebao arid areas jujube forests water-carbon flux water use efficiency |
| title | Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions |
| title_full | Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions |
| title_fullStr | Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions |
| title_full_unstemmed | Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions |
| title_short | Dynamics of water-carbon fluxes and water use efficiency in jujube orchards in arid regions |
| title_sort | dynamics of water carbon fluxes and water use efficiency in jujube orchards in arid regions |
| topic | arid areas jujube forests water-carbon flux water use efficiency |
| url | https://www.ggpsxb.com/jgpxxben/ch/reader/view_abstract.aspx?file_no=20250102&flag=1 |
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