A SIMULATION STUDY FOR GROWTH, PHENOLOGY AND YIELD OF WHEAT 
CULTIVARS UNDER THE DOUBLED CO2 CONCENTRATION IN MASHHAD CONDITIONS

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KOOCHAKIE A.; NASIRI MAHALATI MAHDI; SHARIFI H.R.; ZAND ESKANDAR; KAMALI GH.A.

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Journal: Desert Year:2001 | Volume:6 | Issue:2 Page(s): 117-127

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Title

A SIMULATION STUDY FOR GROWTH, PHENOLOGY AND YIELD OF WHEAT CULTIVARS UNDER THE DOUBLED CO2 CONCENTRATION IN MASHHAD CONDITIONS

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Keywords

CO2 CONCENTRATIONQ4

WHEATQ3

SIMULATIONQ2

GREEN AREA INDEXQ4

Abstract

Growth, development and yield of five WHEAT cultivars were predicated by a general WHEAT SIMULATION model for arid and semi-arid environments (SIMTAG), after validation with experimental results. Weather inputs of the model including global radiation, temperature and precipitation under Mashhad conditions were generated by running a general circulation model (UKMO). With doubled CO2 concentration. The SIMTAG model was adapted to increased CO2 level through its effect on radiation use efficiency. SIMULATION results under doubled CO2 level were compared with those under current climatic conditions. Overall response to increased CO2 level and the resulting climatic changes were the same among the WHEAT genotypes. Temperature rise due to doubling CO2 leveled to a reduction in average duration from sowing to maturity by 27 days. However, leaf area index, leaf number per plant, and total above-ground dry matter increased by 6, 12, and 6.4%, respectively. Pattern of dry matter partitioning was also affected by climatic conditions. Under doubled CO2 level contribution of spikes in total dry matter was 8% higher than current conditions which resulted in a 30% increase in grain yield when averaged over all WHEAT cultivars. It was concluded that WHEAT will take advantages from doubling CO2 level under Mashhad climatic conditions by developing a higher GREEN AREA INDEX, allocation of more dry matter to reproductive organs and consequently higher harvest index and grain yield.

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APA: Copy

KOOCHAKIE, A., NASIRI MAHALATI, MAHDI, SHARIFI, H.R., ZAND, ESKANDAR, & KAMALI, GH.A.. (2001). A SIMULATION STUDY FOR GROWTH, PHENOLOGY AND YIELD OF WHEAT CULTIVARS UNDER THE DOUBLED CO₂ CONCENTRATION IN MASHHAD CONDITIONS. DESERT (BIABAN), 6(2), 117-127. SID. https://sid.ir/paper/5335/en

Vancouver: Copy

KOOCHAKIE A., NASIRI MAHALATI MAHDI, SHARIFI H.R., ZAND ESKANDAR, KAMALI GH.A.. A SIMULATION STUDY FOR GROWTH, PHENOLOGY AND YIELD OF WHEAT CULTIVARS UNDER THE DOUBLED CO₂ CONCENTRATION IN MASHHAD CONDITIONS. DESERT (BIABAN)[Internet]. 2001;6(2):117-127. Available from: https://sid.ir/paper/5335/en

IEEE: Copy

A. KOOCHAKIE, MAHDI NASIRI MAHALATI, H.R. SHARIFI, ESKANDAR ZAND, and GH.A. KAMALI, “A SIMULATION STUDY FOR GROWTH, PHENOLOGY AND YIELD OF WHEAT CULTIVARS UNDER THE DOUBLED CO₂ CONCENTRATION IN MASHHAD CONDITIONS,” DESERT (BIABAN), vol. 6, no. 2, pp. 117–127, 2001, [Online]. Available: https://sid.ir/paper/5335/en

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