ارزیابی تاثیر کم‌آبیاری بر عملکرد گندم زمستانه در منطقه شهرکرد

--Water is the most important limiting factor for agricultural development in arid and semi-arid regions. The purpose of this research is to evaluate the effect of Deficit Irrigation on the yield of winter wheat in Shahrekord region in order to protect water resources. For this purpose, an experiment with three replications was conducted in the form of randomized complete block design in the lands of the Agricultural and Natural Resources Research Center in 1402-1401. The studied treatments included four treatments with full irrigation (T100), 20% Deficit Irrigation (T80), 40% Deficit Irrigation (T60) and 60% Deficit Irrigation (T40). In the present study, statistical analysis was performed using the LSD method. The results showed that the Deficit Irrigation has an effect on the grain yield of winter wheat in the climatic conditions of Shahrekord region. With a 20% reduction in the volume of water needed for irrigation compared to the treatment that was used with full irrigation water, the yield of wheat grain decreased by more than 14%. Also, with a 40% reduction in irrigation water compared to the full irrigation treatment, seed yield decreased by more than 31%. The results show that the use of Deficit Irrigation provides water use at levels lower than the full water requirement of the plant and reduces water consumption with a slight decrease in crop yield.