The effects of variousfertilizer compositions on fruit quality and productivity of the figtree (Ficus carical.) CV. Benatty in Duhok, Iraq

In this study, the effects of organic fertilizer, urea and nano fertilizer applications on the growth characteristics, yield performance and fruit quality of 'Benatty' fig variety were investigated. Compared to the control application, both individual and combination applications of organic fertilizer, urea and nano fertilizers had significant effects on tree and fruit development parameters and nutrient contents (vegetative growth characteristics, leaf protein and nutrient contents, fruit yield and quality characteristics, fruit nutrient contents). 20 kg tree-1 organic fertilizer + 1.5% urea combination improved shoot length, leaf area, leaf dry matter, leaf total protein, leaf nutrient content (nitrogen, phosphorus and magnesium), total fruit number per tree, total yield per tree, total yield per hectare, total soluble solids, total flavonoids, total carotenoids, fruit nutrient content (phosphorus and calcium) values. 20 kg tree-1 organic fertilizer + 0.75% urea combination significantly increased leaf total chlorophyll content, leaf nutrient content (potassium, iron and zinc), fruit dry weight, total soluble solids, vitamin C, total antioxidants, total phenols and potassium content of fruit. 20 kg tree-1 organic fertilizer + 4 mL L-1 nano fertilizer combination increased shoot length, leaf area, leaf total chlorophyll content, leaf dry matter, leaf total proteins, leaf nitrogen contents, fruit diameter, total fruits per tree, total yield per tree, total yield per hectare, total soluble solids, total phenols, total proteins and fruit nutrient contents (nitrogen and iron). The combination of 4 mL L-1 nano fertilizer + urea 1.5% caused significant improvements in shoot length, leaf area, leaf dry matter, leaf nutrient content (phosphorus and magnesium), total fruit number per tree, total soluble solids, total carotenoids and fruit calcium content. The triple combination of 20 kg tree-1 organic fertilizer + 4 mL L-1 Nano fertilizer + 1.5% urea also improved shoot length, leaf total chlorophyll content, leaf dry matter, leaf total proteins, and leaf nutrient contents (nitrogen, phosphorus and magnesium).