Investigation of the effect of meteorological-agricultural drought on rainfed wheat yield in Iran using SPEI

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Dehghani Sargazi Haniye; BAZRAFSHAN OMMOLBANIN; ZAMANI HOSSEIN

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Journal Paper

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Journal: NIVAR Year:2022 | Volume:45 | Issue:114-115 Page(s): 15-26

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Title

Investigation of the effect of meteorological-agricultural drought on rainfed wheat yield in Iran using SPEI

Author(s)

Dehghani Sargazi Haniye | BAZRAFSHAN OMMOLBANIN | ZAMANI HOSSEIN | Issue Writer Certificate

Keywords

Agricultural drought

Rainfed Wheat

Climatological variables

Abstract

The aim of this study is to evaluate the yield of Rainfed Wheat in Iran affected by drought. Climatic information and yield of reinfed wheat in Iran from 1983 to 2014 were prepared from ءMAJ and IRIMO. Accordingly, the climate type of each region was determined based on the extended De-Martone method. SPEI calculated in 3, 6, 9, 12 and 18 months scales in each climate. Using the Umbrothermic method, the wet period of the year was selected as the effective period of drought on the growth of Rainfed Wheat. During these periods, the average SPEI was taken each year to represent the annual SPEI changes in the scales studied. Rainfed Wheat yield was standardized annually. The relationship between SPEI and Rainfed Wheat was estimated by the Spear-man correlation method. The temporal and spatial trends of drought and yield in Iran were also examined. Based on the results, the highest correlation was observed in the southeast, west and northwest on a scale of 3 to 6 months and the lowest correlation was observed in the east. The trend of drought in Iran is increasing and the trend of wheat yeild is not significant and sometimes decreasing trend. The results of this study will be useful in managing and planning the development of Rainfed Wheat cultivation based on future climatic conditions.

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APA: Copy

Dehghani Sargazi, Haniye, BAZRAFSHAN, OMMOLBANIN, & ZAMANI, HOSSEIN. (2022). Investigation of the effect of meteorological-agricultural drought on rainfed wheat yield in Iran using SPEI. NIVAR, 45(114-115 ), 15-26. SID. https://sid.ir/paper/962987/en

Vancouver: Copy

Dehghani Sargazi Haniye, BAZRAFSHAN OMMOLBANIN, ZAMANI HOSSEIN. Investigation of the effect of meteorological-agricultural drought on rainfed wheat yield in Iran using SPEI. NIVAR[Internet]. 2022;45(114-115 ):15-26. Available from: https://sid.ir/paper/962987/en

IEEE: Copy

Haniye Dehghani Sargazi, OMMOLBANIN BAZRAFSHAN, and HOSSEIN ZAMANI, “Investigation of the effect of meteorological-agricultural drought on rainfed wheat yield in Iran using SPEI,” NIVAR, vol. 45, no. 114-115 , pp. 15–26, 2022, [Online]. Available: https://sid.ir/paper/962987/en

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