Abstract
The experiment was conducted in the lath house of Hawija Horticultural Station/ Horticulture Department/ Ministry of Agriculture, during the 2021 growing season on one-year-old of the lemon Transplants. (local species). This study conducted to compare the effect of some sources of iron and zinc and their interaction on the vegetative growth characteristics of lemon Tranplants. The experiment included two factors: iron sources at four levels (control, ferrous sulfate, chelated iron, nano-iron), and zinc with four levels as well (control, zinc sulfate, chelated zinc, and nano-zinc).The Transplants were sprayed three times during the growing season with the two components from their different sources at a concentration of 50 mg L-1. The experiment was carried out according to Randomized Complete Block Design (RCBD) with four replicates. The data were collected and analyzed statistically and the averages were compared by Duncan's multiple range test at 0.05 probability level. The results showed that spraying with ferrous sulfate led to a significant increase in percent of seedling height,and spraying with chelated iron gave significant superiority in increase percent of stem diameter, and leaf thickness,and spraying with nano iron achieved the highest values in the one leaf area, and the total leaves area which outperformed significantly compared with control treatment. Spraying with chelated zinc gave the largest total leaves area of the seedling, while spraying with nano-zinc gave the highest percentage of increase in stem diameter, seedling height, one leaf area of the seedling, and leaf thickness. Regarding for the interaction,Transplant treated with chelated iron and nano-zinc gave the highest values in the percentage of increase in stem diameter,single leaf area,and leaf thickness.The treatment of the interaction between ferrous sulfate and nano-zinc gave the highest value for the percentage of increase in the seedling height, while the highest value of the total leaves area of the seedling was with the interaction treatment for both nanoparticles of iron and zinc.
 
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