Water deficiency, especially in arid and semi-arid areas, is one of the most important reasons that limits production. The currentresearch was done to investigate the effect of Mycorrhiza (Mossea variety) and zinc spraying on agronomic and morphological traits of grain sorghum bicolor (L.) (Payam variety) under low irrigation conditions. It was conducted at the research farm of the Faculty of Agriculture, Islamic Azad University, Varamin,Pishvabranch. This research was conducted by means of a split factorial in a randomized complete block design with three replications. The main factors different levels of irrigation on three levels of total furrow irrigation (control treatment),fixed alternate irrigation and rotational alternate irrigation. Secondary factors of mycorrhizaat two levels include Mycorrhiza application and lack of mycorrhiza application and zinc spraying are mentioned in three levels of zinc sulfate spraying, zinc chelate spraying and spraying with distilled water. The studied characteristics include plant height, number of panicles, number of grains per panicle, yield components such as grain yield, 1000-grain weight, chlorophyll content, protein content, leaf relative water content, biological yield ,and proline. The results of agronomic and physiological traits disclosed that there was a significant difference regarding the main interaction effect between these traits and irrigation treatments, mycorrhiza application and zinc spray at 1 and 5% levels.And there was no significant difference in line with interaction effect of irrigation and mycorrhiza treatment with the number of grains per panicle and biological yield at 5% and 1000-grain weight at 1% level. Also, the triplicate interactions of irrigation, Mycorrhiza,and zinc with biological yield were significant at 5% level. Using Mycorrhiza in low irrigation conditions has led to a growth in the yield and water absorption of the plant which is economical.
