University of Tehran Press Iranian Journal of Soil and Water Research 2008-479X 49 2 2018 05 22 Evaluation of the effect of irrigation interval by conducting partial rootzone drying (PRD) deficit irrigation and full irrigation (FI) on sunflower plant Evaluation of the effect of irrigation interval by conducting partial rootzone drying (PRD) deficit irrigation and full irrigation (FI) on sunflower plant 439 451 65992 10.22059/ijswr.2017.236874.667715 FA Mojtaba Cheraghizade Ph.D. Student, Water engineering department, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Ali Shahnazari Associate Professor, Water engineering department, Sari Agricultural Sciences and Natural Resources University, Sari, Iran 0000-0003-1135-8174 Mirkhaleq ZiatabarAhmadi Professor of Sari Agricultural and Natural Resources University. Journal Article 2017 07 17 The current study was conducted at Sari county prior 2015 and 2016 seasons with split plot design with three main factors (irrigation interval) and three sub main factors (irrigation water amount) in a complete block design in three replications. The irrigation intervals were irrigation after 20, 35 and 50 mm evaporation from class A evaporation pan (respectively F-20, F-35 and F-50). The statistical analysis of data was conducted by SAS software using Duncan test. Due to the non-significant difference for seed performance (SP) trait between FI and PRD-75 treatments, it could be possible to save approximately 13% of water by applying PRD-75. The F20-FI and F20-PRD75 treatments had the best results for SP respectively. F20-PRD75 and F35-FI had the best results for oil performance. The current study was conducted at Sari county prior 2015 and 2016 seasons with split plot design with three main factors (irrigation interval) and three sub main factors (irrigation water amount) in a complete block design in three replications. The irrigation intervals were irrigation after 20, 35 and 50 mm evaporation from class A evaporation pan (respectively F-20, F-35 and F-50). The statistical analysis of data was conducted by SAS software using Duncan test. Due to the non-significant difference for seed performance (SP) trait between FI and PRD-75 treatments, it could be possible to save approximately 13% of water by applying PRD-75. The F20-FI and F20-PRD75 treatments had the best results for SP respectively. F20-PRD75 and F35-FI had the best results for oil performance. https://ijswr.ut.ac.ir/article_65992_d6d66b1cc0ed324b96b4cfc23eb152f9.pdf