Effect of nano urea and nano zinc on growth and yield of rose (Rosa chinensis L.) cv. Ganganagri

The present investigation “Effect of Nano urea and Nano zinc on growth and yield of Rose (Rosa chinensis L.) cv. Ganganagri” was conducted during 2022-23 in the instructional farm of the Department of Floriculture and Landscape Architecture, College of Horticulture and Forestry, Jhalawar. The experiment consisted of sixteen treatments having four levels of each Nano zinc (control, 25 ppm, 50 ppm and 75 ppm) and Nano urea (control, 25 ppm, 50 ppm and 75 ppm). The experiment was laid out in factorial randomized block design with three replications. Results indicated that maximum percent increase in number of leaves per plant (33.068 and 39.811% at 30 and 60 DAS), number of secondary branches (35.852 and 40.092%, at 30 and 60 DAS), length of secondary branches (35.007 and 36.352% at 30 and 60 DAS), plant spread (21.845 and 28.880% at 30 and 60 DAS), flower yield/ha (4.072) were observed under Nano zinc 75 ppm. Among four different concentrations of Nano urea (control, 25 ppm, 50 ppm and 75 ppm), maximum percent increase in number of leaves (34.358 and 40.762% at 30 and 60 DAS), number of number of secondary branches (36.066 and 41.317% at 30 and 60 DAS), length of secondary branches (35.619 and 37.479% at 30 and 60 DAS), plant spread (22.406 and 29.472% at 30 and 60 DAS), flower yield/ha (4.083) were observed under Nano urea75 ppm. Among interactions of Nano urea and Nano zinc are concerned, number of leaves per plant (41.086 and 45.405% at 30 and 60 DAS), number of secondary branches per plant (39.853 and 44.880% at 30 and 60 DAS), length of secondary branches per plant (39.443 and 41.104% at 30 and 60 DAS), plant spread (24.108 and 33.012% at 30 and 60 DAS), flower yield/ha (4.663) were observed under Nano urea 75 ppm + Nano zinc 75 ppm.