Effect of humic acid and chelated iron on yield and quality of two strawberry cultivars (Fragaria X ananassa Duch. )‎

الملخص EN

The experiment was conducted in the Agricultural Research and Experiments Station belonging to Horticulture and Landscape department, College of Agriculture , University of Kirkuk, located at the university presidency in the Alsiyada area in Kirkuk province, during the season (2019-2020).

In order to study the effect of spraying with humic acid (0, 2 and 4) ml.L -1 and chelated iron (0, 1.5 and 3) g.L -1 on some quantitative and qualitative traits of the fruits of two strawberry cultivars Ruby Gem and Albion.

The experiment was conducted according to a completely randomized design (CRD) of three replicates 18 (2 × 3 × 3), where each experimental unit included 6 plants.

The results obtained can be summarized as follows: 1.

The fruits of the Albion cultivar were significantly higher in the number of fruits, fruit weight, fruit size, average yield per plant, Total Soluble Solids percentage , TSS / TA percentage and fruit content of anthocyanin pigment, while Ruby Gem was significantly excelled in vitamin C 2.

The spraying was characterized by a concentration of 2 ml.L -1 of humic acid by giving it the highest content of fruits of vitamin C and the content of fruits of the anthocyanin pigment, While the spraying with a concentration of 3 ml.L -1 was excelled in the number and weight of the fruit, the percentage of total soluble solids and the fruit content of the anthocyanin pigment , and the control treatment was excelled in the total acidity percentage.

3.

It was found that spraying with 1.5 g.L-1 of chelated iron was significantly higher in Total Soluble Solids percentage and TSS / TA and the fruit content of anthocyanin pigment.

The spraying had a concentration of 3 g.L -1 in the percentage of total soluble solids, the percentage of TSS / TA, and the fruit content of vitamin C, and the control treatment gave the highest acidity.