Article (Scientific journals)
Effects of agro-climatic indices on wheat yield in arid, semi-arid, and sub-humid regions of Iran
Kheiri, Mohammad; Kambouzia, Jafar; Rahimi-Moghaddam, Sajjad et al.
2024In Regional Environmental Change, 24 (1)
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Keywords :
Climate adaptation; Drought; Grain filling period; Impact analysis; Irrigation; Water stress; Global and Planetary Change
Abstract :
[en] This study aimed to analyze the impact of variations of drought-related agro-climatic indices including cumulative precipitation, cumulative potential evapotranspiration, cumulative actual evapotranspiration, cumulative crop evapotranspiration, cumulative water stress, and cumulative water deficit during nine consecutive phenological stages (emergence to physiological maturity) on wheat yield in arid, semi-arid, and sub-humid regions of Iran during 1999–2018. Principal component analysis was used to recognize the main components that largely explained the variations of agro-climatic indices during different stages of the crop growing period. Then, the relationships between the major components, retrieved from principal component analysis, and the crop yield were assessed. Wheat irrigation requirements were also calculated to investigate the regional water supply–demand patterns during the crop growing period. The findings highlighted increasing impacts of cumulative precipitation, cumulative potential evapotranspiration, cumulative crop evapotranspiration, and cumulative actual evapotranspiration and decreasing impacts of cumulative water stress and deficit on wheat yield, particularly in arid and semi-arid regions. The crop yield was more affected by variations of the agro-climatic indices during the reproductive phase than the vegetative phase. Accordingly, booting to flowering in the arid region, flowering in the sub-humid region, and stem elongation to booting in the semi-arid region were the most sensitive periods of wheat to agro-climatic indices variations. Wheat irrigation requirements in arid and semi-arid regions started earlier than in the sub-humid region. From the findings, it was concluded that adjusting the irrigation schedule based on wheat irrigation requirements during the wheat growing period could help farmers to achieve a favorable wheat yield.
Disciplines :
Agriculture & agronomy
Author, co-author :
Kheiri, Mohammad;  Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University, Tehran, Iran
Kambouzia, Jafar;  Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University, Tehran, Iran
Rahimi-Moghaddam, Sajjad;  Department of Production Engineering and Plant Genetics, Faculty of Agriculture, Lorestan University, Khorramabad, Iran
Moghaddam, Saghi Movahhed;  Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Vasa, László;  Faculty of Economics, Széchenyi Istvàn University, Győr, Hungary
Azadi, Hossein  ;  Université de Liège - ULiège > TERRA Research Centre > Modélisation et développement ; Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic ; Faculty of Environmental Science and Engineering, Babeș-Bolyai University, Cluj-Napoca, Romania
Language :
English
Title :
Effects of agro-climatic indices on wheat yield in arid, semi-arid, and sub-humid regions of Iran
Publication date :
March 2024
Journal title :
Regional Environmental Change
ISSN :
1436-3798
eISSN :
1436-378X
Publisher :
Springer Science and Business Media Deutschland GmbH
Volume :
24
Issue :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 September 2024

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