Simulating future wheat yield under climate change, carbon dioxide enrichment and technology improvement in Iran. Case study: Azarbaijan region

Spanish Journal of Agricultural Research

Hamed Mansouri¹  Abdolreza Nokhbe Zaeim¹  Yaghoub Raei² 

[1] Ferdowsi University of Mashhad, Faculty of Agriculture, Department of Agronomy. Mashhad;University of Tabriz, Faculty of Agriculture, Department of Plant Ecophysiology. Tabriz;

关键词: DSSAT;    general circulation model;    SRES;    crop model;   

DOI  :  10.5424/sjar/2015134-6970

来源: DOAJ

【 摘 要 】

Climate change and technology development can affect crop productivity in future conditions. Precise estimation of crops yield change as affected by climate and technology in the future is an effective approach for management strategies. The aim of this study was to estimate the impacts of climate change, technology improvement, CO₂ enrichment, and overall impacts on wheat yield under future conditions. Wheat yield was projected for three future time periods (2020, 2050 and 2080) compared to baseline year (2011) under two scenarios of IPCC Special Report on Emission Scenarios (SRES) including SRES-A2 as regional economic scenario and SRES-B1 as global environmental scenario in Azarbaijan region (NW of Iran). A linear regression model, describing the relationship between wheat yield and historical year, was developed to investigate technology development effect. The decision support system for agro-technology transfer (DSSAT4.5) was used to evaluate the influence of climate change on wheat yield. The most positive effects were found for wheat yield as affected by technology in all studied regions. Under future climate change, the SRES projected a decrease in yield, especially in West Azarbaijan region. When the effects of elevated CO₂ were considered, all regions resulted to increase in wheat yield. Considering all components effect in comparison with baseline (2011), yield increase would range from 5% to 38% across all times, scenarios and regions. According to our findings, it seems that we may expect a higher yield of wheat in NW Iran in the future if technology development continues as well as past years.

【 授权许可】

Unknown