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Applying stable isotopes to determine seasonal variability in evapotranspiration partitioning of winter wheat for optimizing agricultural management practices
Ma, Ying; Song, Xianfang
2019-03-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume654Pages:633-642
Corresponding AuthorMa, Ying(maying@igsnrr.ac.cn)
AbstractThe partitioning of evapotranspiration (ET) into soil evaporation (E) and crop transpiration (T) is fundamental for accurately monitoring agro-hydrological processes, assessing crop productivity, and optimizing water management practices. In this study, the isotope tracing technique was used to partition ET of winter wheat under different irrigation (100, 160 and 240 mm) and fertilization (105, 210 and 315 kg N ha(-1)) treatments during the 2014 and 2015 growing seasons in Beijing, China. The correlations between seasonal ET partitioning and the leaf area index (DM), grain yield, and water use efficiency (WUE, ratio of crop yield and Ell were investigated and agricultural management practices were optimized. The fraction of T in ET (F-T) between the greening and harvest seasons was 0.82 on average and did not vary significantly among the treatments (p > 0.05). However, the values of F-T during the individual growth periods ranged from 0.51 to 0.98, and they were remarkably distinct for all treatments. The seasonal variability in F(T )could be effectively explained via a power-law function of the LAI (F-T = 0.61 LAI(0.21), R-2 0.66, p < 0.01). There was no significant relationship between F-T and the grain yield or WUE (p > 0.05). The total T during the jointing-heading and heading-filling periods (T-jf) had significantly quadratic relationships with the crop yield and WUE (p < 0.01). Both the crop yield and the WUE had high values under the T-jf range of 117.5-155.8 mm. Furthermore, the WUE was higher under larger ratio of E in ET (F-E) during the greening-jointing period and lower F-E during the filling-harvest period. Two irrigations during the greening-jointing (20 mm) and heading-filling (80 mm) stages and one fertilization ( 105 kg ha(-1) N) during the greening-jointing stage were determined as appropriate irrigation and fertilization schedules. (C) 2018 Elsevier B.V. All rights reserved.
KeywordEvapotranspiration partitioning Seasonal variations Crop development Water use efficiency Stable isotopes Irrigation management
DOI10.1016/j.scitotenv.2018.11.176
WOS KeywordWATER-USE EFFICIENCY ; SOIL EVAPORATION ; PLANT TRANSPIRATION ; CARBON-DIOXIDE ; SUMMER MAIZE ; IRRIGATION ; VAPOR ; ECOSYSTEM ; PATTERNS ; YIELD
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41671027] ; National Natural Science Foundation of China[41730749]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000458630100053
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49384
Collection中国科学院地理科学与资源研究所
Corresponding AuthorMa, Ying
AffiliationChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Ma, Ying,Song, Xianfang. Applying stable isotopes to determine seasonal variability in evapotranspiration partitioning of winter wheat for optimizing agricultural management practices[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,654:633-642.
APA Ma, Ying,&Song, Xianfang.(2019).Applying stable isotopes to determine seasonal variability in evapotranspiration partitioning of winter wheat for optimizing agricultural management practices.SCIENCE OF THE TOTAL ENVIRONMENT,654,633-642.
MLA Ma, Ying,et al."Applying stable isotopes to determine seasonal variability in evapotranspiration partitioning of winter wheat for optimizing agricultural management practices".SCIENCE OF THE TOTAL ENVIRONMENT 654(2019):633-642.
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