Effect Of Two Citrus Rootstocks And Foliar Spraying With Certain Treatments On Some Chemical Traits Of Dancan Grapefruit Scions

Abstract

The experiment was conducted in one of the nurseries in Babil Governorate during the period from 10/10/2024 to 1/6/2025 to study the effect of two citrus rootstocks and foliar spraying with certain treatments on some chemical traits of Dancan grapefruit scions. Grafted seedlings were obtained from the horticultural station in Al-Hindiya District. The experiment included two factors with three replications: the first factor was two rootstock types, coded as A (A1: Volkameriana, A2: Rangpur), and the second factor, coded as T, included the following treatments: control (T0), nano-fertilizer NPK (T1) at 1 g·L⁻¹, tryptophan acid (T2) at 200 mg·L⁻¹, humic acid (T3) at 2 mL·L⁻¹, and vitamin C (T4) at 250 mg·L⁻¹.                   

The results indicated that foliar spraying significantly affected some studied traits. Foliar application of vitamin C recorded the highest leaf iron content (97.33%), while spraying with nano-fertilizer NPK resulted in the highest chlorophyll content in leaves (66.9 SPAD units).                                                               

The interaction between rootstocks and treatments significantly affected most studied traits. The combination A2 T4 achieved the highest leaf iron content (106.64%), the highest leaf carbohydrate content (22.02%), and the highest leaf nitrogen content (1.913%). In contrast, A1 T3 recorded the highest leaf potassium content (1.547%), while A2 T1 achieved the highest leaf chlorophyll content (73.5 SPAD) and the highest leaf phosphorus content (0.216%).