Effect of method of application and different nutrient solutions in Dendrobium orchid under polyhouse

The present investigation entitled “Nutrient Management in Dendrobium Orchid Under NV Polyhouse Condition” was conducted at Floriculture Research Farm, Navsari Agricultural University, Navsari, Gujarat, during October 20, 2020 to October 19, 2022. The vegetative growth parameters are recorded at every 6, 12, 18 and 24 months after starting of experiment on 6 years old already established plants. For the easy understanding, the vegetative parameters were analysed with split plot design, where, treatments acted as a main plot and months (6, 12, 18, and 24) acted as sub plot. There are different nutrients which used in the experiment likewise, N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, B, Ni and Mo and made treatments as T1: Solution P, T2: Solution P + S, T3: Solution P + M1, T4: Solution P + S + M1, T5: Solution P + M1 + M2, T6: Solution P + S + M1 + M2, T7: Solution P + S + M1+ M2 (Fortnightly), T8: Solution D (Drenching) and T9: T7 + T8. The vegetative parameters were influenced significantly by different levels of macro and micronutrients. The maximum plant height (53.27 cm), number of shoots (13.77), number of leaves per plant (9.03), stem diameter (3.52 cm) were recorded in treatment T6 (Solution P + S + M1 + M2) and plant height was at par with T5 (52.61 cm), T4 (51.19 cm). While, leaf area (33.83 cm2) and chlorophyll content (35.95 SPAD) were found maximum in T4 (Solution P + S + M1). Thus, the present findings that i.e. N: 200 mg/l weekly spray while, P:50 mg/l, K: 200 mg/l, Ca and Fe: 100 mg/l, each of Mg, Mn, Zn: 50 mg/l, S: 232.3 mg/l, Cu: 10 mg/l, B: 25 mg/l and Ni, Mo: 5 mg/l (each) at every 15 days interval spray enhanced growth of Dendrobium orchid under polyhouse.