Effects of climate change on growth criteria and yield of sunflower and chickpea crops in Iran

Yield and growth criteria of irrigated and rainfed sunflowerHelianthus annusand chickpeaCicer arientinumwere studied under simulated climate change for Tabriz in Iran. Monthly average temperature and rainfall under doubling CO₂ were predicted using Goddard Institute for Space Studies (GISS) and Geop...

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Bibliographic Details
Published in:Climate research 2006-04, Vol.30 (3), p.247-253
Main Authors: Koocheki, A., Nassiri, M., Soltani, A., Sharifi, H., Ghorbani, R.
Format: Article
Language:English
Subjects:
Carbon dioxide
Chickpeas
Climate change
Climate models
Irrigation
Irrigation water
Photosynthesis
Rain
Soil water
Sunflowers
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Summary:Yield and growth criteria of irrigated and rainfed sunflowerHelianthus annusand chickpeaCicer arientinumwere studied under simulated climate change for Tabriz in Iran. Monthly average temperature and rainfall under doubling CO₂ were predicted using Goddard Institute for Space Studies (GISS) and Geophysical Fluid Dynamics Laboratory (GFDL) models. The effects of climatic change on crop growth period, yield components and water requirements of those crops were evaluated by a crop simulation model (OSBOL). Based on GISS and GFDL predictions, with doubling CO₂ concentration, mean annual temperature for Tabriz increased by 4.6 and 4.3°C, respectively. The results obtained by GISS showed that doubling CO₂ will lead to an increase in mean temperature of 3.7°C, and a 40% increase in mean rainfall, during the first 5 mo of the year. However, GFDL predicted an increase of 4.7°C in mean temperature and a reduction of 12% in mean rainfall during the first 5 mo of the year. According to OSBOL under GDFL predictions, the period from sowing to maturity and harvest index were reduced by climate change, whereas yield, biomass and water requirement for irrigated sunflower were increased. The biomass for rainfed sunflower increased, while days to maturity and harvest index were reduced. Yield predictions of OSBOL based on GISS contrasted with those based on GFDL. Doubling CO₂ caused a reduction in days to maturity, biomass, yield and water requirements for irrigated chick pea. The number of days to maturity for rainfed chickpea was reduced and harvest index, biomass and yield were increased due to climate change.
ISSN:0936-577X
1616-1572
DOI:10.3354/cr030247