Water and Fertilizer Use Efficiency in Aerobic Rice as Influenced by Fertigation Schedules Yamuna BG*, Kumar M Dinesh Department of Agronomy, College of AgricultureUniversity of Agricultural and Horticultural Sciences, Shimoga577201Karnataka, India *Email: for correspondence: yamunabg.gowda@gmail.com
Online Published on 12 September, 2022. Abstract Field experiments were conducted during kharif 2016 and summer 2016 in the field of Department of Agronomy, College of Agriculture, Shimoga, Karnataka. The effect of levels and methods of fertilizer application (surface and fertigation) with combination of water soluble fertilizers and normal fertilizers or alone on growth and yield of aerobic rice was studied. Results revealed that among root characteristics studied, fertigated plots recorded higher volume and weight and comparatively length remained high in surface irrigation. Compared to the 100 per cent RDF plots, fertigated plots recorded higher major nutrients to the extent of 25 per cent. Total water used for the kharif and summer in the surface irrigation was 975 and 1,303 mm against 584 and 746 mm for fertigated plots respectively thereby saved the water resulting use efficiency from 43.29 and 34.42 (100% RDF with surface irrigation plots) up to 100+ and 90+ kg/ha respectively for kharif and summer in different fertigated plots. Similarly nutrient use efficiency of nitrogen also increased from 82.09 and 86.18 up to 119.17 and 124.11 kg/ha from surface to fertigated plots respectively. Fertigated plots performed best for achieving yield (60.95-68.92 q/ha grain) with higher water use efficiency (59.29 to 104.81 kg/ha/cm) among the treatments tested. Top Keywords Aerobic rice, Drip, Fertilizers, Fertigation, Water soluble fertilizers. Top |