Vol. 12, Issue 11 (2023)

Author(s):
B Sahithi, Dr. K Kaladhar Babu, Dr. P Prasanth, Dr. D Lakshminarayana and Dr. P Gouthami

Abstract:
The experiment entitled “Studies on effect of nano urea and nano DAP alone and in combination with different levels of nitrogen and phosphorus on growth and yield of marigold (Tagetes erecta L.) Cv. Super ball” was carried out during the rabi season of the year 2022-2023 at PG Research block. College of Horticulture, Mojerla, Sri Konda Laxman Telangana State Horticultural University. Among the treatments, the treatment T₆ (50% N + 50% P₂O₅ + Nano Urea @ 3ml/l + Nano DAP @ 5ml /l (2 sprays at 30 DAT, 45 DAT) recorded maximum plant height (69.34cm), plant spread in East-West direction (50.72cm), plant spread in North -South direction (47.96 cm), number of branches per plant (10.0), leaf area (13.40 cm²), number of flowers plant^-1 (32.13), flower diameter (6.82cm), flower fresh weight (12.23g), flower yield plant^-1 (230.67g), flower yield plot^-1 (4.61kg), flower yield hectare^-1 (11.46 t). whereas minimum number of days to first flower bud initiation (32.20 days), 50% flowering (44.60 days), number of days to full bloom (51.20 days) and, highest leaf chlorophyll content (54.21) recorded in T₁ (100% RDF). However T₂ -75% N + Nano Urea @ 2ml/l (2 sprays at 30 DAT and 45 DAT), recorded minimum in all the parameters.