EFFECT OF WATER STRESS ON YIELD AND YIELD COMPONENTS OF PEANUT CULTIVARS

To evaluate the effect of irrigation regimes on yield and water productivity, a split plot experiment was conducted with three replications in Iran in 2017 and 2018. The main treatment consisted of 40%, 60%, 80% and 100% water requirements, respectively, and the sub-treatment consisted of four peanut cultivars which are types of peanuts that are cultivated in Iran market (Guil, Gorgani, Jonobi and Mesri). Each 100 grams of these introduced peanuts contains 25.5 grams of protein and 48.4 grams of fat. Seed yield in 2017 with an average of 1316 kg ha-1 was higher than seed yield in 2018 with an average of 1022 kg ha-1 Due to irrigation, seed yield in the treatments of 40% and 60% of water requirement with the average of 1345kg ha-1 and 1379 kg ha-1, respectively, had the highest value. Due to the year of irrigation, the maximum seed yield in 2017 and in treatments of 40% and 60% of water requirement were with an average of 1494 kg ha-1 and 1593 kg ha-1, respectively. In peanut cultivars, Jonobi cultivar with an average of 1273 kg ha-1, had the highest value compared to other cultivars. Due to irrigation×cultivars, 40% water requirement treatment and Jonobi cultivar with an average of 1732 kg ha-1, and also 60% water requirement treatment and Guil cultivar with an average of 1667 kg ha-1 had the highest value. The maximum seed yield due in year ×irrigation ×cultivar was in 2017, and in the treatment of 40% of water requirement and in the Jonobi cultivar with an average of 1856 kg ha-1. Water productivity on biological yield (4.32 kg m-3) and pod yield (1.96 kg m-3) in Mesri cultivar and Water productivity on seed yield in Gorgani cultivar were 0.54 kg m-3.