In order to investigate the effects of mycorrhiza (Glomus Fasciculatum) and phosphorus fertilizer on grain yield, biological yield, harvest index, plant height and number of branch in basil under water deficit condition, an experiment was conducted as split plot in randomized complete block design with four replications at Iran in 2011. The main-plot factor included: Two levels of irrigation regime (I1 and I2 irrigation after 40 and 80 mm evaporation respectively) while the sub-plot factors included phosphorus fertilizer application (P1,P2 and P3application 0, 35, 70 kg/ha respectively) and mycorrhiza inoculation at two levels (M1 = non- application and M2= application of mycorrhiza). The results showed that the traits were all highly significantly different under water deficit condition. Phophorus and mycorrhiza affected grain yield and biological yield significantly .The results also showed that the highest grain yield, biological yield, harvest index, plant height and number of branch were obtained from application of phosphorus fertilizer (70 kg/ha) under normal irrigation.
Key words: Drought stress, Glomus Fasiculatum, Basil, phosphorus.
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