Standardization of NPK fertigation in broccoli (Brassica oleracea L. var. italica) under tarai conditions of Uttarakhand
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Date
2019-08
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was undertaken to standardize the NPK fertigation in broccoli at Vegetable Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during October to February for two consecutive years i.e. 2016-17 and 2017-18. The experiment was laid out in two factorial randomized block design with one additional treatment consisting of five fertigation levels viz., F1 :120 percent of RDF, F2 : 100 per cent of RDF, F3: 80 per cent of RDF, F4 : 60 per cent of RDF and F5: 40 per cent of RDF and three fertigation scheduling viz., S1 : 25, 15 and 20 per cent N, P2O5 and K2O of fertigation levels between 5-20 days after transplanting (DAT), respectively, 40, 15 and 25 per cent N, P2O5 and K2O of fertigation levels between 21-36 DAT, respectively, 20, 50 and 40 per cent N, P2O5 and K2O of fertigation levels between 37-52 DAT, respectively, 15, 20 and 15 per cent N, P2O5 and K2O of fertigation levels between 53-68 DAT, respectively, S2 : 25 per cent of each N, P2O5 and K2O between 5-20 DAT, 21-36 DAT, 37-52 DAT and 53-68 DAT, respectively and S3: 20, 20 and 20 per cent N, P2O5 and K2O of fertigation levels between 5-20 DAT, respectively, 40, 30 and 20 per cent N, P2O5 and K2O of fertigation levels between 21-36 DAT, respectively, 30, 30 and 30 per cent per cent N, P2O5 and K2O of fertigation levels between 37-52 DAT, respectively and 10, 20 and 30 per cent N, P2O5 and K2O of fertigation levels between 53-68 DAT, respectively, along with one control (soil application of RDF with flooding) replicated thrice. The findings of present investigation revealed that performance of broccoli was significantly influenced by different drip fertigation levels and scheduling. Among the different fertigation levels, fertigation of broccoli at 120 per cent of RDF (F1) was found best with respect to plant growth characters, root parameters, maturity parameters, quality, nutrients content & nutrients uptake in plant. Whereas, fertigation at 100 percent of RDF (F2) was found best with respect to head parameters, water use efficiency, yield (15.20 t/ ha), net return (` 158462.6 and 152788.8) and benefit cost ratio (3.19 and 3.11). Among the three scheduling tested, scheduling S1 was found best in terms of growth parameters, root parameters, head parameters, nutrient content and uptake in plant, water use efficiency, yield (13.83 t/ ha), net return (` 141603.5 and 138284.8) and benefit cost ratio (3.09 and 3.05). Fertigation at 100 percent RDF (F2) through scheduling S1 recorded significantly higher yield (15.43 t/ ha and 15.09 t/ ha), net return (` 160061.4 and 155002.19) and benefit cost ratio (3.24 and 3.17) and was best treatment combination. Based on the overall performance, it could be concluded that under tarai conditions of Uttarakhand, fertigation of broccoli at 120:60:60 kg N, P2O5 and K2O per ha (F2) through scheduling S1 is the best and most economical for cultivation of broccoli. Hence, the same is recommended for commercial cultivation.
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