Growth, Yield and Quality of Rose (Rosa hybrida) as Influenced by Fertilizer Doses under Polyhouse

An experiment was carried out during the period of 2022-23 in the Experimental Farm, Department of Horticulture, Assam Agricultural University, Jorhat. The experiment was laid out in Factorial Randomized Block Design with three levels of nutrients i.e. Nitrogen (N), Phosphorus (P), Potassium (K). Each of these has three levels N(N1,N2,N3) where N1(10 g N/m²), N2(20 g N/m²) and N3(30 g N/m²). Similarly, P has three levels where P1(10 g P2O5/m²), P2(20 g P2O5/m²) and P3(30 g P2O5/m²). Again K has three levels where K1(10 g K2O/m²), K2(20 g K2O/m²) and K3(30 g K2O/m²) which replicated three times. The results revealed that, among the N levels, N2 recorded highest plant height, number of leaves per plant, maximum leaf area in 60 DAP, 90 DAP and 120 DAP and highest bud length, stalk length, flower diameter, number of flowers per plant and vase life. Among the different phosphorus levels P1 recorded highest plant height, number of leaves per plant, leaf area, plant spread in 60 DAP,90 DAP and 120 DAP and highest stalk length, flower diameter, number of flowers. Again among the different K levels, K2 recorded highest plant height in 90 DAP and 120 DAP.K2 recorded highest plant spread in 60 DAP and 90 DAP and K3 recorded highest leaf area in 90 DAP and 120 DAP and highest plant spread in 120 DAP and again recorded maximum stalk length and number of flowers. Among the interaction treatments, N2P1K3 showed best results in terms of most of the growth and flowering characters having B:C ratio of 3.98.