Iranian Journal of Irrigation & Drainage

Iranian Journal of Irrigation & Drainage

Investigating green water footprint in spring wheat under climate change conditions and different crop dates

Document Type : Original Article

Authors
1 1 MSC Student, Department of Water Science and Engineering, Faculty of Agricultural and Natural Resources, Imam Khomeini International University, Qazvin, Iran.
2 Dept. of Water Sciences and Engineering, Imam Khomeini International University
3 2 Assoc. Professor, Water Science and Engineering Department, Faculty of Agricultural and Natural Resources, Imam Khomeini International University, Qazvin, Iran.
4 1 1- Postdoctoral Researcher of Irrigation and Drainage, Joint Cooperation Program, Imam Khomeini International University (IKIU) and Wageningen University and Research (WUR)
Abstract
One of the most important effects of climate change is on plants, especially on agricultural products. Therefore, it will be necessary to investigate this phenomenon and its effects on agriculture. In this study, the effect of climate change and cultivation in different dates; The amount of green footprint was investigated during the cultivation period of Parsi variety of spring wheat in Qazvin plain. This study was conducted in the period of 2021-2100 and by comparing two information sources LARS-WG and DKRZ in producing annual climate change data and using the AquaCrop model in simulating plant response to the mentioned changes. In the periods of 2021-2040, 2041-2060, 2061-2080, and 2080-2100, different planting dates (Bahman 15, Esfand 1, Esfand 15, April 1, and April 15) were investigated in order to increase wheat yield and reduce green water footprint. According to the results of the climatic conditions of the LARS-WG model under scenarios 4.5 and 8.5, in all the next 4 periods, the average footprint of green water will decrease compared to its value in the base period, except for three cases in all dates. Meanwhile, under the climatic conditions of the DKRZ database in scenarios 4.5 and 8.5, in most dates and periods, the average footprint of green water will decrease compared to its value in the base period. According to the results, the largest amount of green water footprint in all these periods and models in the period of 2021-2040 under the climatic conditions of the DKRZ database in scenario 4.5, if the planting date is 15th of Bahman, it is estimated that the amount of water consumption It is predicted to be 273 cubic meters per ton with a standard deviation of 32.65 cubic meters per ton.
Keywords

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