Flower and Bulb Production of Tuberose (Polianthes tuberosa L.) as Influenced by Different Sources of Nutrients

The present investigation on flower and bulb production of tuberose (Polianthes tuberosa L.) cv. Vaibhav as influenced by different sources of nutrients was carried out at Horticultural Research Centre (HRC) of SVPUAT, Meerut during the year 2013-14. The experiment consisted of ten treatments, viz. T1: control ( without NPK), T2 : 100% RDF (160:80:80), T3: 75% RDF + 25% Neem Cake, T4: 75% RDF + 25% Neem Cake+ 2.0 g/plant Azospirillum + 2.0g/plant PSB, T5: 75% RDF + 25% VC, T6: 75% RDF + 25% VC + 2.0 g/plant Azospirillum + 2g/plant PSB, T7: 50% RDF + 50% Neem Cake, T8: 50% RDF +50% Neem Cake + 2.0 g/plant Azospirillum + 2g/plant PSB, T9: 50% RDF + 50% VC T10: 50% RDF + 50% VC + 2.0 g/plant Azospirillum + 2g/plant PSB. Results revealed that the 50% reduced doses of inorganic fertilizers which was supplemented by organic and bio fertilizers using in treatment T10 (50% RDF+ 50% VC + 2.0 g/plant Azospirillum + 2.0 g/plant PSB), produced maximum diameter of flower, number of florets per spike, diameter of spike and number of spikes per corm, while treatment T6 resulted maximum length of spike, rachis length and number of corms per plant. The treatment receiving 50% RDF+ 50% VC + 2.0 g/plant Azospirillum + 2.0 g/plant PSB significantly resulted in maximum values for number of bulblets, diameter of bulb, weight of bulb and yield of bulbs and bulblets per plant.