Study the effect of nitrogen and spacing on growth parameters of marigold

This study was carried out at the Department of Horticulture, C.C.S. University, Campus, Meerut, (U.P.), during 2017–18 and 2018–19 to examine the effect of nitrogen and spacing on growth parameters of Marigold (Tagetes erecta L.) cv. Pusa Narangi Gainda. The experiment was laid out in Factorial Randomized Block Design (F.R.B.D.) with three replications. The results revealed that different levels of nitrogen and spacing had a significant effect on the vegetative growth characteristics of the Marigold. Among four different nitrogen levels viz; 0, 150, 200 and 250 kg N/ha; pooled results showed that applying 250 kg nitrogen per hectare had a significant effect on growth attribute parameters such as plant height (87.48 cm), primary branches per plant (17.44), secondary branches per plant (23.86), plant spread (41.78 cm), diameter of main stem (1.57 cm), fresh weight of plant (253.72 g) and dry weight of plant (53.27 g). Similarly, among four different spacing's viz, 30x30 cm, 45x30 cm, 45x45 cm and 60x45 cm, pooled results indicated that the maximum plant height (86.28 cm) was recorded at closer spacing i.e. 30x30 cm and maximum fresh weight (270.80 g) and dry weight (56.80 g) of plant at spacing i.e. 45x45 cm, while maximum primary branches per plant (18.39), secondary branches per plant (25.13), plant spread (42.70 cm) and diameter of main stem (1.63 cm) were observed under wider spacing i.e. 60x45 cm. As for as the interactions of nitrogen levels and spacing are concerned, the maximum plant height (94.06 cm) was recorded under the application of 250 kg N/ha and closer spacing 30x30 cm (N3S1). The maximum numbers of primary branches per plant (21.06), secondary branches per plant (27.99), plant spread (48.29 cm) and diameter of main stem (1.76 cm) were recorded under the application of 250 kg N/ha and wider spacing of 60x45 cm (N3S4); while the maximum fresh weight of plant (314.33 g) and dry weight of plant (65.73 g) were recorded with the application of 250 kg N/ha and spacing 45x45 cm (N3S3).