University of Kashan Journal of Nanostructures 2251-7871 15 3 2025 07 01 Response of Growth, Yield and Active Compounds of Rosemary to Spraying of Nano-Zinc and Benzyl Adenine 1220 1229 114967 10.22052/JNS.2025.03.039 EN Ghufran Alaa Al-Khazraji College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad, Iraq Farah Najim Al-Deen Al-Nasrawi National Center of Hematology, Mustansiriyah University, Baghdad, Iraq Sara Mohammed Sadiq College of Pharmacy, University of Baghdad, Baghdad, Iraq Journal Article 2025 04 14 An experiment was implemented during the 2023-2024 year at the research station of the College of Education for Pure Science - Ibn Al-Haitham - University of Baghdad. The investigation aimed to evaluate the effects of nano zinc and benzyl adenine (BA) spraying on the growth, yield, and active compound content of rosemary. The factorial experiment conducted based on a randomized complete block design (RCBD) at three replications. The first factor consisted of three concentrations of nano-zinc (0, 10 and 20 mg L-1), while the second factor contains three concentrations of BA (0, 3 and 6 mg L-1). Spraying nano-zinc at 20 mg L-1 considerably enhanced the height of the plant, the branches number for each plant, branches length, plant content of nitrogen and phosphorous, chlorophyll and volatile oil content in leaves, and leaves yield (1086.7 Kg ha-1). Conversely, nano-zinc at 10 mg L-1 concentration was substantially effective in the leaves content of rosmarinic acid (681.1 mg g-1 dry weight). For BA, spraying at a concentration of 6 mg L-1 significantly excelled in the number of branches per plant (13.22 mg L-1), plant content of nitrogen and phosphorous, leaves content of chlorophyll, volatile oil and rosmarinic acid (720.1 mg g-1 dry weight) and leaves yield (1117.2 Kg ha-1).The correlation between studied factors influenced most of the studied traits. https://jns.kashanu.ac.ir/article_114967_a7f598d4791856bf2828a7c7afe7494f.pdf