Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 5.153
IF5.153
IF 5-year value: 5.460
IF 5-year
5.460
CiteScore value: 7.8
CiteScore
7.8
SNIP value: 1.623
SNIP1.623
IPP value: 4.91
IPP4.91
SJR value: 2.092
SJR2.092
Scimago H <br class='widget-line-break'>index value: 123
Scimago H
index
123
h5-index value: 65
h5-index65
Preprints
https://doi.org/10.5194/hess-2018-234
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2018-234
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  14 May 2018

14 May 2018

Review status
This preprint has been withdrawn by the authors.

Seasonal variability in evapotranspiration partitioning and its relationship with crop development and water use efficiency of winter wheat

Ying Ma1, Praveen Kumar2, and Xianfang Song1 Ying Ma et al.
  • 1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • 2Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana 61801, IL, USA

Abstract. The 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 and quantify the root water uptake sources of winter wheat during the 2014 and 2015 growing seasons in Beijing, China. The correlations between seasonal ET partitioning and the leaf area index (LAI), grain yield, and water use efficiency (WUE) were investigated. The fraction of T in ET (FT) between the greening and harvest seasons was 0.82 on average and did not vary significantly among the different irrigation and fertilization treatments (p > 0.05). However, the values of FT during the individual growth periods were remarkably distinct (ranging from 0.51 to 0.98) among the treatments. The seasonal variability in FT could be effectively explained via a power-law function of the LAI (FT = 0.61 LAI0.21, R2 = 0.66, p < 0.01). There was no significant relationship between FT and the grain yield or WUE (p > 0.05). The total T during the jointing–heading and heading–filling periods (Tjf) 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 Tjf range of 117.5–155.8 mm. Furthermore, the WUE was improved by increasing the ratio of E in ET (FE) during the greening–jointing period and by reducing FE during the filling–harvest period. Winter wheat mainly utilized soil water from the 0–20 cm (67.0 %), 20–70 cm (42.0 %), 0–20 cm (38.7 %), and 20–70 cm (34.9 %) layers during the greening–jointing, jointing–heading, heading–filling, and filling–harvest periods, respectively. This indicated that the irrigation wetting layer should be controlled at depth of 70 cm to conserve water.

This preprint has been withdrawn.

Ying Ma et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Ying Ma et al.

Ying Ma et al.

Viewed

Total article views: 1,461 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
1,180 266 15 1,461 28 33
  • HTML: 1,180
  • PDF: 266
  • XML: 15
  • Total: 1,461
  • BibTeX: 28
  • EndNote: 33
Views and downloads (calculated since 14 May 2018)
Cumulative views and downloads (calculated since 14 May 2018)

Viewed (geographical distribution)

Total article views: 1,215 (including HTML, PDF, and XML) Thereof 1,166 with geography defined and 49 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 28 Sep 2020
Publications Copernicus
Download
Withdrawal notice

This preprint has been withdrawn.

Short summary
This study determined the seasonal variations in ET partitioning and root water uptake sources of winter wheat via the isotope tracing technique. The correlations between ET partitioning and LAI, grain yield and WUE were investigated. The seasonal change in fraction of T in ET could be effectively described as a power-law function of LAI. The total T during the jointing–heading and heading–filling periods had a significant quadratic relationship with grain yield and WUE.
This study determined the seasonal variations in ET partitioning and root water uptake sources...
Citation