Vol. 11, Issue 10 (2022)

Author(s):
Sonam Rawat, Lalit Bhatt, PK Singh, Poonam Gautam, SK Maurya and Upendra Kumar Singh

Abstract:
A field experiment was conducted at Vegetable Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India during October to April 2020-21 and 2021-22 to study the effect of NPK fertigation levels and its scheduling on tomato under naturally ventilated polyhouse. The experiment was laid out in two factorial randomized block design with one additional treatment consisting of four fertigation levels viz., F₁: 120 percent of RDF, F₂: 100 per cent of RDF, F₃: 80 per cent of RDF and F4: 60 per cent of RDF and three fertigation scheduling viz., S₁: 15, 10 and 10 per cent N, P₂O₅ and K₂O of fertigation levels between 15-45 days after transplanting (DAT), respectively, 40, 40 and 40 per cent N, P₂O₅ and K₂O of fertigation levels between 46-76 DAT, respectively, 30, 40 and 40 per cent N, P₂O₅ and K₂O of fertigation levels between 77-107 DAT, respectively, 15, 10 and 10 per cent N, P₂O₅ and K₂O of fertigation levels between 108-138 DAT, respectively, S₂: 25 per cent of each N, P₂O₅ and K₂O between 15-46 DAT, 46-76 DAT, 77-107 DAT and 108-138 DAT, respectively and S₃: 20, 20 and 20 per cent N, P₂O₅ and K₂O of fertigation levels between 15-46 DAT, respectively, 30, 30 and 30 per cent N, P₂O₅ and K₂O of fertigation levels between 46-76 DAT, respectively, 30, 30 and 30 per cent per cent N, P₂O₅ and K₂O of fertigation levels between 77-107 DAT, respectively and 20, 20 and 20 per cent N, P₂O₅ and K₂O of fertigation levels between 107-138 DAT, respectively, along with one control (soil application of RDF with surface irrigation) replicated thrice. The results indicated that fertigation of 120 and 100 per cent of RDF was found at par and significantly better over other fertigation levels with respect to plant growth characters, yield parameters and nutrient content. It was further concluded from the study that fertigation of 100 per cent of RDF (300:150:150 kg ha^-1) through scheduling S1 was best treatment combination.