Author(s):

Narendra Kumar, VM Prasad and Netra Pal Yadav

Abstract: The present investigation entitled, “Effect of chemical fertilizers and bio fertilizers on flower yield, root yield and quality parameter on Dahlia (Dahlia variabilis L.) cv. Kenya Orange was under taken in the Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj,(Allahabad). During Rabi season (2018-2019). The experiment was layout in Randomized Block Design (RBD) with 13 treatments and each treatment replicated thrice. The treatments consist of different combinations of chemical fertilizers (N, P and K) and bio fertilizers (Azotobacter and PSB) and control (No fertilizers and manures). The treatment T₃ (N₈₀ +P₁₀₀+ K₁₀₀ + Azotobacter @ 2.0 kg/ha) was found the statistically significant compared to other treatment combination, which recorded highest flower diameter (21.88 cm), flower weight (63.80 gm), flower yield per plant (504.59 gm), flower yield per plot (2.850 kg), flower yield per hectare (11.72 t/ha), Vase life in normal tap water (6.53days) followed by T₉ (N₁₀₀ + P₈₀ + K₁₀₀ + PSB @ 3.0 kg/ha) and lowest yield. The treatment T₁₀ (N₁₀₀ +P₈₅ + K₁₀₀ +PSB @ 2.25 kg/ha) was found the statistically significant compared to other treatment combination, which recorded highest weight of single tuber (59.23g) numbers of Tubers per plant (8.56), tuber yield per plant (47.00 gm), tuber yield per plot (2612.33 gm),Yield of Tubers per hectare (10.75 t/ha) followed by T₅(N₉₀ + P₁₀₀ + K₁₀₀ + Azotobacter @ 1.0 kg /ha)and lowest yield was obtained from T₀ (control).

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