Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model
The future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was...
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doaj-ba773e2adb90475dbbf08758f71c2b4b2020-11-24T22:52:09ZengMDPI AGWater2073-44412018-11-011011162410.3390/w10111624w10111624Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D ModelLijian Zheng0Juanjuan Ma1Xihuan Sun2Xianghong Guo3Qiyun Cheng4Xiaokai Shi5College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaThe future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was estimated under surface irrigation using water stable isotope technology and the Hydrus-1D model. Using the Romero-Saltos and IsoSource models, the stable isotopes of water in stems, different soil depths, and different precipitation were analyzed in a 5-year-old dwarfing apple orchard during two seasons 2016 and 2017. Hydrus-1D model was able to simulate the RWU of apple using the maximum coefficient of determination (0.9), providing a root mean square error of 0.019 cm<sup>3</sup> cm<sup>−3</sup> and a relative error of 2.25%. The results showed that the main depth of RWU ranged from 0⁻60 cm during the growth season, with the main contribution occurring in the 0⁻40 cm depth. These findings indicated that reducing the traditional surface irrigation depth will be important for improving the irrigation water use efficiency.https://www.mdpi.com/2073-4441/10/11/1624water usehydrogen and oxygennumerical simulationsurface irrigationappleroot water uptake |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lijian Zheng Juanjuan Ma Xihuan Sun Xianghong Guo Qiyun Cheng Xiaokai Shi |
spellingShingle |
Lijian Zheng Juanjuan Ma Xihuan Sun Xianghong Guo Qiyun Cheng Xiaokai Shi Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model Water water use hydrogen and oxygen numerical simulation surface irrigation apple root water uptake |
author_facet |
Lijian Zheng Juanjuan Ma Xihuan Sun Xianghong Guo Qiyun Cheng Xiaokai Shi |
author_sort |
Lijian Zheng |
title |
Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model |
title_short |
Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model |
title_full |
Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model |
title_fullStr |
Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model |
title_full_unstemmed |
Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model |
title_sort |
estimating the root water uptake of surface-irrigated apples using water stable isotopes and the hydrus-1d model |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2018-11-01 |
description |
The future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was estimated under surface irrigation using water stable isotope technology and the Hydrus-1D model. Using the Romero-Saltos and IsoSource models, the stable isotopes of water in stems, different soil depths, and different precipitation were analyzed in a 5-year-old dwarfing apple orchard during two seasons 2016 and 2017. Hydrus-1D model was able to simulate the RWU of apple using the maximum coefficient of determination (0.9), providing a root mean square error of 0.019 cm<sup>3</sup> cm<sup>−3</sup> and a relative error of 2.25%. The results showed that the main depth of RWU ranged from 0⁻60 cm during the growth season, with the main contribution occurring in the 0⁻40 cm depth. These findings indicated that reducing the traditional surface irrigation depth will be important for improving the irrigation water use efficiency. |
topic |
water use hydrogen and oxygen numerical simulation surface irrigation apple root water uptake |
url |
https://www.mdpi.com/2073-4441/10/11/1624 |
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