Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China

To examine evapotranspiration (ETc), soil evaporation (Es), and transpiration (Tr), and partitioning of ETc, a two-year field experiment was carried out in a maize field with drip irrigation under mulch in an...

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Autores principales:	Chenggong Xuan, Risheng Ding, Jie Shao, Yanshuo Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	evapotranspiration transpiration maize drip irrigation under mulch strategic deficit irrigation Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/d16fefc008004477be6b3a4cf104b0e7
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spelling	oai:doaj.org-article:d16fefc008004477be6b3a4cf104b0e72021-11-25T19:15:00ZEvapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China10.3390/w132231692073-4441https://doaj.org/article/d16fefc008004477be6b3a4cf104b0e72021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3169https://doaj.org/toc/2073-4441To examine evapotranspiration (ET<sub>c</sub>), soil evaporation (E<sub>s</sub>), and transpiration (T<sub>r</sub>), and partitioning of ET<sub>c</sub>, a two-year field experiment was carried out in a maize field with drip irrigation under mulch in an arid region of northwestern China in 2017 and 2018. In the experiment we designed two treatments with full irrigation (T1) and growth stage-based strategic regulated deficit irrigation (T2). The applied irrigation of T2 was 40% of the T1 during both late vegetative and reproductive growth stages. Based on the measurements of soil water content (SWC) and T<sub>r</sub>, a dual crop coefficient model (SIMDualK<sub>c</sub>) was calibrated and validated, and daily ET<sub>c</sub>, E<sub>s</sub>, and T<sub>r</sub> were estimated. The model can simulate well the dynamic variations of SWC and T<sub>r</sub>. The calibrated basic crop coefficient at the initial, mid-season, and end growth stages was 0.2, 1.15, and 0.75, respectively. The ET<sub>c</sub> was 507.9 and 519.1 mm for the T1 treatment, and 428.9 and 430.9 mm for the T2 treatment. The ratios of T<sub>r</sub> to ET<sub>c</sub> were higher for the two treatments, ~90%, for two years. Collectively, both drip irrigation under mulch and strategic deficit irrigation after canopy covering of the ground can significantly reduce the ineffective proportion of ET<sub>c</sub> and E<sub>s</sub>.Chenggong XuanRisheng DingJie ShaoYanshuo LiuMDPI AGarticleevapotranspirationtranspirationmaizedrip irrigation under mulchstrategic deficit irrigationHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3169, p 3169 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	evapotranspiration transpiration maize drip irrigation under mulch strategic deficit irrigation Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	evapotranspiration transpiration maize drip irrigation under mulch strategic deficit irrigation Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Chenggong Xuan Risheng Ding Jie Shao Yanshuo Liu Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
description	To examine evapotranspiration (ET<sub>c</sub>), soil evaporation (E<sub>s</sub>), and transpiration (T<sub>r</sub>), and partitioning of ET<sub>c</sub>, a two-year field experiment was carried out in a maize field with drip irrigation under mulch in an arid region of northwestern China in 2017 and 2018. In the experiment we designed two treatments with full irrigation (T1) and growth stage-based strategic regulated deficit irrigation (T2). The applied irrigation of T2 was 40% of the T1 during both late vegetative and reproductive growth stages. Based on the measurements of soil water content (SWC) and T<sub>r</sub>, a dual crop coefficient model (SIMDualK<sub>c</sub>) was calibrated and validated, and daily ET<sub>c</sub>, E<sub>s</sub>, and T<sub>r</sub> were estimated. The model can simulate well the dynamic variations of SWC and T<sub>r</sub>. The calibrated basic crop coefficient at the initial, mid-season, and end growth stages was 0.2, 1.15, and 0.75, respectively. The ET<sub>c</sub> was 507.9 and 519.1 mm for the T1 treatment, and 428.9 and 430.9 mm for the T2 treatment. The ratios of T<sub>r</sub> to ET<sub>c</sub> were higher for the two treatments, ~90%, for two years. Collectively, both drip irrigation under mulch and strategic deficit irrigation after canopy covering of the ground can significantly reduce the ineffective proportion of ET<sub>c</sub> and E<sub>s</sub>.
format	article
author	Chenggong Xuan Risheng Ding Jie Shao Yanshuo Liu
author_facet	Chenggong Xuan Risheng Ding Jie Shao Yanshuo Liu
author_sort	Chenggong Xuan
title	Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
title_short	Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
title_full	Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
title_fullStr	Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
title_full_unstemmed	Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China
title_sort	evapotranspiration and quantitative partitioning of spring maize with drip irrigation under mulch in an arid region of northwestern china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d16fefc008004477be6b3a4cf104b0e7
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_version_	1718410124596346880

Evapotranspiration and Quantitative Partitioning of Spring Maize with Drip Irrigation under Mulch in an Arid Region of Northwestern China

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