Deficit irrigation enhances contribution of shallow groundwater to crop water consumption in arid area

Gao, Xiaoyu; Bai, Yining; Huo, Zailin; Xu, Xu; Huang, Guanhua; Xia, Yuhong; Steenhuis, Tammo S.

doi:10.1016/j.agwat.2017.02.012

Cited by 41 publications

(24 citation statements)

References 47 publications

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“…WTD in this site should always decline, which is due to no groundwater recharge by DI. The effect of change in groundwater table on crop water consumption was analysed in many studies, and the contribution of groundwater to evapotranspiration decreases with the decline of WTD (Karimov et al, ; Gao, Huo, et al, ). On the other hand, lowering the groundwater table decreases the actual evaporation rate at the soil surface and consequently decreases the root‐zone salinity (Askri, Ahmed, Abichou, & Bouhlila, ; Chen & Hu, ).…”

Section: Resultsmentioning

confidence: 99%

“…Sensors were connected to data loggers and downloaded via wireless transmission. Calibration was conducted from the SWC using the oven drying method (Gao, Bai, et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…Sensors were connected to data loggers and downloaded via wireless transmission. Calibration was conducted from the SWC using the oven drying method (Gao, Bai, et al, 2017). WTD was measured by piezometers (HOBO Water Level Logger-U20, Onset Computer Corp, MA, USA) recorded at 0.5-hr intervals.…”

Section: Field Experimentsmentioning

confidence: 99%

“…WP was estimated to be 3.11 and 2.61 kg m −3 for DI and FI, respectively. WP and IWP under traditional FI are slightly larger than the results of experiments considering different amounts of FI byGao, Bai, et al, 2017. One reason could be the better soil characteristics for crop growth in this site.WP and IWP under DI generally agree with the results of the experiment of…”

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confidence: 99%

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Drip irrigation enhances shallow groundwater contribution to crop water consumption in an arid area

Wang

Huo

Guan

et al. 2018

Hydrological Processes

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Shallow groundwater plays a key role in agro‐hydrological processes of arid areas. Groundwater often supplies a necessary part of the water requirement of crops and surrounding native vegetation, such as groundwater‐dependent ecosystems. However, the impact of water‐saving irrigation on cropland water balance, such as the contribution of shallow groundwater to field evapotranspiration, requires further investigation. Increased understanding of quantitative evaluation of field‐scale water productivity under different irrigation methods aids policy and decision‐making. In this study, high‐resolution water table depth and soil water content in field maize were monitored under conditions of flood irrigation (FI) and drip irrigation (DI), respectively. Groundwater evapotranspiration (ETg) was estimated by the combination of the water table fluctuation method and an empirical groundwater–soil–atmosphere continuum model. The results indicate that daily ETg at different growth stages varies under the two irrigation methods. Between two consecutive irrigation events of the FI site, daily ETg rate increases from zero to greater than that of the DI site. Maize under DI steadily consumes more groundwater than FI, accounting for 16.4% and 14.5% of ETa, respectively. Overall, FI recharges groundwater, whereas DI extracts water from shallow groundwater. The yield under DI increases compared with that under FI, with less ETa (526 mm) compared with FI (578 mm), and irrigation water productivity improves from 3.51 kg m−3 (FI) to 4.58 kg m−3 (DI) through reducing deep drainage and soil evaporation by DI. These results highlight the critical role of irrigation method and groundwater on crop water consumption and productivity. This study provides important information to aid the development of agricultural irrigation schemes in arid areas with shallow groundwater.

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Section: Resultsmentioning

confidence: 99%

“…Sensors were connected to data loggers and downloaded via wireless transmission. Calibration was conducted from the SWC using the oven drying method (Gao, Bai, et al, ).…”

Section: Methodsmentioning

confidence: 99%

Section: Field Experimentsmentioning

confidence: 99%

mentioning

confidence: 99%

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Drip irrigation enhances shallow groundwater contribution to crop water consumption in an arid area

Wang

Huo

Guan

et al. 2018

Hydrological Processes

Self Cite

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“…Relevant researchers pointed out that groundwater action was particularly critical in the analysis of the soil-crop-atmosphere system water balance in an arid oasis [13][14][15][16][17][18]. The deficit irrigation schedule in shallow groundwater areas could improve groundwater utilization but limited the influence on yield [19][20][21]. Karimov et al [22] pointed out that a shallower groundwater depth promoted phreatic evaporation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Spring Wheat Irrigation Schedule in Shallow Groundwater Area of Jiefangzha Region in Hetao Irrigation District

Peng

Zhang

Cai

et al. 2019

Water

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Due to the large spatial variation of groundwater depth, it is very difficult to determine suitable irrigation schedules for crops in shallow groundwater area. A zoning optimization method of irrigation schedule is proposed here, which can solve the problem of the connection between suitable irrigation schedules and different groundwater depths in shallow groundwater areas. The main results include: (1) Taking the annual mean groundwater depth 2.5 m as the dividing line, the shallow groundwater areas were categorized into two irrigation schedule zones. (2) On the principle of maximizing the yield, the optimized irrigation schedule for spring wheat in each zone was obtained. When the groundwater depth was greater than 2.5 m, two rounds of irrigation were chosen at the tillering-shooting stage and the shooting-heading stage with the irrigation quota at 300 mm. When the groundwater depth was less than 2.5 m, two rounds of irrigation were chosen at the tillering-shooting stage, and one round at the shooting-heading stage, with the irrigation quota at 240 mm. The main water-saving effect of the optimized irrigation schedule is that the yield, the soil water use rate, and the water use productivity increased, while the irrigation amount and the ineffective seepage decreased.

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Modeling Agricultural Hydrology and Water Productivity to Enhance Water Management in the Arid Irrigation District of China

Gao¹,

Huo²,

Qu³

et al. 2022

Enhancing Agricultural Research and Precision Management for Subsistence Farming by Integrating System Models With Experiments

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Deficit irrigation enhances contribution of shallow groundwater to crop water consumption in arid area

Cited by 41 publications

References 47 publications

Drip irrigation enhances shallow groundwater contribution to crop water consumption in an arid area

Drip irrigation enhances shallow groundwater contribution to crop water consumption in an arid area

Optimization of Spring Wheat Irrigation Schedule in Shallow Groundwater Area of Jiefangzha Region in Hetao Irrigation District

Modeling Agricultural Hydrology and Water Productivity to Enhance Water Management in the Arid Irrigation District of China

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