The Effect of Climate Change on Evapotranspiration, Leaf Area Index and Growth Indices of Chickpea (Cicer arietinum L) at Gonbad Condition

Climate changs is one of the most important issues that has been observed in agriculture in recent decades and has limited production of crops. SSM-iLegum-Chickpea model was used to simulate the effect of climate change on evapotranspiration and leaf area index and growth indices of chickpea seed in Gonbad. First, meteorological data from the Dome Synoptic Meteorological Station from 1993 to 2017.The scenarios include increasing the temperature by two, four and six degrees, increasing the Co2 concentration by two times, and reducing rainfall by two percent, and a combination of the above scenarios, which total 9 scenarios. For the high temperature scenarios, the maximum and minimum daily temperature changes were added. Results of analysis of variance showed that in dry and irrigated conditions the effect of sowing date and climate change scenarios on all traits such as grain filling period, grain filling speed, evapotranspiration, leaf area index and total grain nitrogen except Harvest index nitrogen (NHI) was significant at 1% level in dryland conditions. But the interaction effect of planting date and climate change was only significant on evapotranspiration and leaf area index at 1% and NHI at 5% level. Duplication of concentrations of CO2 caused increasing about 6.2 in harvest index of nitrogen. Also, the best planting date for Gonbad city is the beginning of December in the simulation conducted for Gonbad.