About 45% of pistachio yield convert to the pistachio waste compost (PWC) after harvesting. Returning of it to the soil, in addition to reducing environmental contamination, increases the soil organic matter and it can affect the uptake of nutrients in pistachio seedlings in saline conditions. In this experiment, PWC at three levels (0, 10 and 15 Kg) and soil containing spores of mycorrizal fungi at three levels (0, 100 and 200 g) was studied with three replications (each replicate included four seedlings) on Akbari and Badami Zarand cultivars pistachio as a split-plot in RCBD in Khorasan Razavi province – Iran,

1. The results showed that iron, manganese and zinc concentration were affected by pistachio cultivars, so that the most concentration of iron (166.4 ppm) and manganese (60.7 ppm) were observed in Akbari and zinc (32.07 ppm) was also detected in the Badami Zarand cultivar. The maximum concentration of iron and manganese under interaction effects of cultivar and PWC was seen in Akbari and 15 and 10 kg of pistachio waste compost, respectively. The most amounts of potassium, iron and manganese was obtained in the treatment of 200 g of fungi with Akbari cultivar. In comparison with other treatments, the interactions of Akbari with 15 kg of PWC in 200 g mycorrhiza had the highest effect on the amount of nitrogen, phosphorus and potassium with 2.1%, 0.12% and 1.72%, respectively. Also, Akbari cultivar with 200 g of mycorrhiza and 10 kg of PWC had the maximum effect on the leaf concentration of iron, manganese and zinc. The average amount of some elements in mycorrhizal treatments was more than the non-inoculated; as, it was observed 0.64 and 0.118% for phosphorus average, then iron with 152 and 86.3 ppm, and finally manganese with 53 and 18.6 ppm for mycorrhizal and non mycorrhizal treatments. But, the results were revealed that the combination of three species of Glomus mossea, Glomus intrardices and Glomus etunicatum was not efficient due to competition among the species of fungi and other native soil microorganisms. The mean value of all nutrients in PWC treatments was higher than the non-consumption. The highest difference was observed for average of zinc with 31.1 and 15.6 ppm, phosphorus (0.118% and 0.083%), and potassium (1.3 and 0.91%). Results indicated that the amount of PWC should be more than 15 kg per seedling to have a more effective influence on the concentration of nutrients in the plant in the water (12.7 dS m^-1) and soil (10.02 dS m^-1) salinity and their relatively alkaline pH (7.8).

Keywords:Pistachio waste compost, Pistachio cultivars, Salinity stress, Mycorrhiza, Macro and micronutrients.