Today, the lack of water resources and the increase in air temperature are serious threats to the urban environment. Therefore, considering the nutritional status of plants in these conditions along with maintaining the health of the environment, it seems necessary. With the increase in population and excessive consumption of common fertilizers in agricultural lands, the concentration of elements in the rhizosphere environment has increased, which cause fertilizer losses due to evaporation and leaching. One of the ways to prevent the sudden increase in concentration and reduce wastage on nutrients is to use slow release fertilizers. This type of fertilizers, with their slow solubility, slowly provides minerals to the plant and can be considered as a suitable solution for increasing the quality and quantity of the product and reducing environmental pollution. The use of mycorrhizal fungi in the root environment increases the absorption of water and nutrients and improves plant growth. Therefore, in this research, an attempt has been made to eva‎luate the growth and physiological response of olive seedlings to two types of common and slow-release fertilizers at the time of root inoculation and non-inoculation with mycorrhizal fungi. Factorial experiment with 3 factors of fertilizer structure (common fertilizer and nanochelate-based fertilizer), release type (normal and slow release) and mycorrhizal fungus (inoculation and non-inoculation) based on a completely randomized design with 9 treatments and 3 replications in Greenhouse of Isfahan University of Technology was carried out. The results showed that compared to the common type, nanochelate fertilizers had a more positive effect on plant growth characteristics such as height, number and length of lateral branches, as well as physiological characteristics such as chlorophyll, carbohydrate and relative water content, and in a longer period of time. They remained in the rhizosphere area. Also, by preventing the precipitation of elements in the alkaline environment of the soil, these fertilizers caused more solubility of minerals such as iron, zinc and phosphorus. The inoculation of plant roots with mycorrhizal fungus also improved the concentration of high-use and low-use elements in the plant. By spreading their hyphae in the environment far from the roots, these fungi increased water and mineral absorption and played a major role in increasing the amount of photosynthesis and leaf carbohydrate production. In general, by using slow-release nanochelate fertilizers along with mycorrhizal fungi, high-use nutrients such as nitrogen, phosphorus, and potassium, as well as low-use nutrients, especially iron and zinc, increased in plant leaves, which directly or indirectly It directly improved the growth and physiological factors of olive seedlings.

علي نيك بخت

حسين شريعتمداري

نعمت اله اعتمادي شلمزاري , حميدرضا عشقي زاده