Irrigation schedule optimization based on the combination of an economic irrigation quota and the AquaCrop model*

Zhao, Yong; Li, Fawen; Jiang, Rengui

doi:10.1002/ird.2577

Cited by 7 publications

(3 citation statements)

References 15 publications

(17 reference statements)

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“…Wang et al (2021aWang et al ( , 2021b showed that the recommended irrigation quota saved 11%-60% irrigation water and improved water use efficiency by 11%-65% without reducing maize yields in some climatic conditions. Zhao et al (2021) used the irrigation quota and AquaCrop model to optimize the irrigation schedule of summer maize.…”

Section: Close Collaboration Between Government Departmentsmentioning

confidence: 99%

Review of agricultural water-saving policies and measures in recent years – a case study of Jiangsu Province, China

Yang

Pu²,

Weng

et al. 2022

Water Supply

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The scarcity of water resources has posed serious threats to the sustainable development of agriculture. China is a largely agricultural country with a large population, and agricultural water consumption accounts for more than 50% of the total water consumption. The application of water-saving irrigation is the main way to realize the sustainable development of water resources and economics. To comprehensively improve crop water-use efficiency and reduce agricultural water consumption, the Chinese central government had promulgated a series of agricultural water-saving policies since 2012, such as strengthening water management, increasing financial investment, and strengthening project construction and operation management and protection. Taking Jiangsu as an example, this paper reviews the main water-saving policies and measures of governments after 2012, as well as the conflicting interest between different water-saving participants. Results showed that, through water-saving policies and measures, its effective utilization coefficient of agricultural irrigation water (EUCAIW) has increased from 0.59 in 2,014 to 0.614 in 2019. By 2019, the area of irrigated arable land controlled by water-saving technologies is 2.848 million hectares, accounting for 67.8% of the irrigated arable land area in Jiangsu. Jiangsu's water-saving policies have been implemented well, and it has guidance on water-saving reform work in other places.

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Section: Close Collaboration Between Government Departmentsmentioning

confidence: 99%

Review of agricultural water-saving policies and measures in recent years – a case study of Jiangsu Province, China

Yang

Pu²,

Weng

et al. 2022

Water Supply

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“…Plant water requirements during the dry and wet years differ for crops and seasons. Zhao et al (2021) described that higher yield co be achieved by applying irrigation but only to a certain limit where additional amounts of irrigation start to cause a decrease in the yield. Pre-sowing irrigation significantly increased soil moisture for winter wheat, and it positively affected yield in dry conditions.…”

Section: Introductionmentioning

confidence: 99%

Aquacrop Model Evaluation for Generation of Irrigation Requirements for Winter Wheat Cultivars

2023

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Researches on the water-saving techniques in agriculture should be brought forward because of water resources shortages. The optimisation of irrigation strategies to increase water-use efficiency is an important factor in water security for the region. AquaCrop model based on FAO’s crop water productivity is used to simulate yield. In our study, the model was calibrated to the field measurements of the MATE ÖVKI Lysimeter Research Station. Four winter wheat cultivars were cultivated under non-limiting water range. Four different average yields were measured as 6.1 t/ha, 5.0 t/ha, 6.3 t/ha and 7.6 t/ha after the harvest on 6th of July 2020, respectively. The results of vegetative growth were inserted and simulated for the same climate conditions, field management, soil profile and groundwater parameters. Whereas we have achieved a yield of 6,1 t/ha 5,0 t/ha, 6,3 t/ha and 7,6 t/h with respective water productivity of 1.17 and 1.07 and 1.23 and 1.2 from the AquaCrop model schedule, respectively. In practice, water optimisation based on climate data and crop yield can help us achieve the goal. The crop cycle of the plants was a fixed value of 187 days and harvest index of 45% was used in model settings. Generation of sprinkler irrigation schedule developed from this research would provide information for farming communities to mitigate the occurrence of the adverse effect of climate change through innovative changes.

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“…(2) Crop growth models (DSSAT model, AquaCrop model, etc.) (Mubeen M. et al, 2016;Zhao Y. et al, 2021;Han C. et al, 2020) are used to describe the relationship between soil moisture changes and crop growth and development for irrigation scheduling optimization.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Application of Irrigation Scheduling Based on Hydrus-2d and Stewart Model in a Semi-Arid Area of China

Jing

Zhang

Dong

et al. 2023

INMATEH

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Water scarcity has been a critical constraint to economic development in semi-arid areas of China, so optimizing irrigation scheduling has become essential. This study obtained quantitative relationships between crop yield, crop water consumption, and irrigation quantity based on the Hydrus-2D and Stewart models. Different irrigation scheduling scenarios were evaluated to obtain the best irrigation scheduling based on the principle of simultaneous water conservation and crop productivity improvement with the evaluation indicators of crop yield, water use efficiency (WUE), irrigation water use efficiency (IWUE), and Critic-Topsis method. Taking drip irrigation under mulch as an example, the problem of optimizing the irrigation scheduling for different typical years was calculated. The optimization results showed that in the wet, normal, dry, and very dry years the annual irrigation quantity should be 49.68 mm, 49.68 mm, 85.38 mm, and 123.72 mm, when the WUE as well as IWUE, increases significantly, which had less impact on the crop yield and can save irrigation quantity by 30.00%, 30.00%, 35.00%, 27.00%. This study used Hydrus-2D to make a new attempt in irrigation scheduling optimization, giving full play to the model's high accuracy in soil water transport simulation and flexibility in boundary condition simulation. The optimization results can provide a reference for achieving accurate control of irrigation quantity during the crop growth period and reasonable irrigation scheduling formulation for regional crops.

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Irrigation schedule optimization based on the combination of an economic irrigation quota and the AquaCrop model*

Cited by 7 publications

References 15 publications

Review of agricultural water-saving policies and measures in recent years – a case study of Jiangsu Province, China

Review of agricultural water-saving policies and measures in recent years – a case study of Jiangsu Province, China

Aquacrop Model Evaluation for Generation of Irrigation Requirements for Winter Wheat Cultivars

Optimization and Application of Irrigation Scheduling Based on Hydrus-2d and Stewart Model in a Semi-Arid Area of China

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