Effect of salinity and irrigation on yield and water use efficiency of peanut varieties

The effect of salinity and water deficit irrigation is one of the most important and prevalent stresses in the world, which prevents proper plant yield. In order to investigate the effect of salinity levels and amount of water needed for peanut, the experimental design was split factorial in a randomized complete block design with three replications in Guilan province during 2015 and 2016. The main irrigation management factor was 40 (WR4), 60 (WR3), 80 (WR2) and 100 (WR1) percent water requirements for irrigation management and sub-treatment including salinity with values of 1 (S1), 3 (S2), 5 (S3) and 7 (S4) ds m-1, and the subdivision included four almond cultivars: Guil (V1), Gorgani (V2), Jonobi (V3) and Mesri (V4). The results showed that the maximum yield of biomass in Mesri cultivar was with 100% water requirements and salinity of 1 dS m-1 in 2015 and 2016 was 12230 and 11110 kg ha-1. The highest pod yield in 2015 in Mesri cultivar was 100% water requirement and salinity one ds m-1 with 1710 kg ha-1. In 2016, the highest yield of pod (5403 kg ha-1) was obtained in 40% water requirement and 7 ds m-1 salinity. The highest amount of seed in Guil cultivar and in 100% water requirement and salinity of 1 dS m-1 in 2015 and 2016 were 1883 and 1710 kg ha-1, respectively.