بررسي اثرات متقابل بين آهن و ازت بر خصوصيات رويشي در دانه رست هاي پسته

Interaction effects between iron and nitrogen on vegetative characteristics of pistachio seedling (Pistachia vera)

In this survey interaction effects between iron and nitrogen on growth and photosynthesis characteristics of Pistachio seedling (Pistachia vera) were studied in sand culture. The experiment was performed in Iran Pistachio Research Institue. The following treatments were employed: 1-Complete Hoaglandʹs nutrient solution, 2- Hoagland solution lacking N, 3-distilled water, 4- Hoagland solution lacking Fe, 5- Hoagland solution lacking Fe- N,. The experimental design used in this study was complete randomized block design with three replications. Deficiency symptoms mainly included leaf discoloration, necrosis, scorching, defoliation and growth stunting. Seedlings that received complete nutrient solution were healthy with dark green foliage. Factors experimental in this survey consisted of leaf number, height of stem, internodes and dry and fresh weight (leaf, root and stem). Seven months after planting, top and root analysis were performed to determine nutrient elements content. The results showed that growth and physiological factors were significant statistically. Reductions in height, leaf area and leaf number were noticed in the deficiencies of nutrient elements (in compared to complete Hoaglandʹs nutrient solution). In the treatment lacking Fe, the absorbtin of N increased significantly. Absorbtion of Fe and N in root and leaf were also affected. Antagonistic effects of the elements were also evident in the present study because of differential metabolism in plants.