The study aimed at examining the impacts of various irrigation systems on passion fruit (Passiflora edulis Sims) seedlings in addition to foliar treatments through N-P-K fertilizer (20-20-20). It was carried out in the greenhouse of the green university of Al-Qasim at Babil in Iraq between 15 September 2023 and 15 March 2024. Seedlings were planted using plastic bags with the capacity of 3 kg. The study was done under experimental design of randomized complete block design with two factors. The former factor comprised two irrigation systems, which included sprinkler and drip irrigation. The second reason was that of the foliar application of N-P-K fertilizer using three levels (0, 2, and 4 g L-1). The findings indicated that there were vast distinctions in the vegetative growth characteristics under investigation such as plant height, diameter of the stem, amount of branches, amount of leaves, and content of chlorophyll. The highest values were realized with the sprinkler irrigation system in addition to a compound fertilizer (N-P-K) of a concentration of 4g/L/L when compared to the drip irrigation system and the control treatment.

Keywords: Passion fruit (P. edulis Sims), irrigation methods, N-P-K fertilizer, foliar fertilization, vegetative growth, chlorophyll content

Key findings: Passion fruit (P. edulis Sims) showed the best vegetative growth values when it was combined with the sprinkler irrigation system and NPK fertilizer. Conversely, the treatment group that applied drip irrigation and applied no supplementary fertilizer, known as control treatment, did not have as many variations in the vegetative growth as compared to the other treatment groups.