Abstract—The effect of different iron fertilization methods on yield and some fruit quality parameters of the date-palm variety ‘Piarom’ was studied in a calcareous soil of Hormozgan Province in Iran. The trees were 12 years old and the treatments comprised of: 1 - control, 2 - surface placement of Fe-EDDHA in the soil with two levels, 3 - deep placement of FeSO₄ in the soil (Chalkood method) with two levels, and 4 - injection of FeSO₄ solution into the trunk of trees with four levels. The experiment was accomplished as a randomized complete blocks design with nine treatments and three replications during four years Injection of 25 grams of FeSO₄ into the trunk resulted in the highest yield, having considerable differences with the other treatments. The maximum concentration of iron, as well as the highest Brix index and reducing sugars content were obtained in trees injected with a solution of FeSO₄, showing no significant differences between different levels of FeSO₄. Therefore, it can be concluded that trunk injection is a more efficient method for iron fertilization of date palms grown in calcareous soils. Moreover, the best injection level was 25 grams FeSO₄ tree^-1. 
 

Index Terms—date palm, iron fertilization, Piarom, trunk injection

Cite: Jahanshah Saleh, Yaaghoob Hosseini, and Maryam Ghoreishi, "Is Trunk Injection More Efficient Than Other Iron Fertilization Methods in Date Palms Grown in Calcareous Soils?," Journal of Advanced Agricultural Technologies, Vol. 3, No. 3, pp. 160-163, September 2016. Doi: 10.18178/joaat.3.3.160-163