Productivity of Adsali Sugarcane Under Drip Irrigation and Fertigation Levels

Abstract

A field experiment on Productivity of adsali sugarcane under drip irrigation and newlinefertigation levels was conducted during 2019-20 and 2020-21 at Agricultural Research newlineStation, Hukkeri (Dist. Belagavi), Karnataka and on farmers field in strip block design newlinewith three drip irrigation levels as vertical strip and three fertigation levels as horizontal newlinestrip with two control treatments i.e., recommended package of practice under surface newlineirrigation and farmers practice with drip irrigation. Irrigation levels were drip irrigation newlineat 0.6 ETo at germination + 0.85 ETo at tillering + 1.0 ETo at canopy establishment + newline1.15 ETo at grand growth + 0.85 ETo at maturity stage (I1), drip irrigation at 0.6 ETo at newlinegermination + 1.0 ETo at tillering + 1.5 ETo at canopy establishment + 1.5 ETo at grand newlinegrowth + 0.85 ETo at maturity stage (I2) and drip irrigation at 0.8 ETo at germination+ newline1.0 ETo at tillering+ 1.75 ETo at canopy establishment + 2.0 ETo at grand growth +1.0 newlineETo at maturity stage (I3). Fertigation levels were viz., 100 per cent RDF (F1) newline(250:75:190 kg N, P2O5 and K2O ha-1), 150 per cent RDF (F2) (375:112.5:285 kg N, newlineP2O5 and K2O ha-1) and 200 per cent RDF (F3) (500:150:380 kg N, P2O5 and K2O ha-1). newlineAt harvest, growth and yield attributing parameters were significantly higher newlinewith drip irrigation at 0.8 ETo at germination + 1.0 ETo at tillering + 1.75 ETo at canopy newlineestablishment + 2.0 ETo at grand growth +1.0 ETo at maturity stage (I3) and fertigation newlineat 150 per cent RDF (F2). Drip irrigation at 0.8 ETo at germination+ 1.0 ETo at newlinetillering+ 1.75 ETo at canopy establishment + 2.0 ETo at grand growth +1.0 ETo at newlinematurity stage (I3) recorded significantly the highest cane yield (275.98 t ha-1) and net newlinereturns ( 5,27,202 ha-1). Application of fertilizers at 150 per cent RDF (F2) through newlinefertigation recorded significantly higher cane yield (251.11 t ha-1) and net returns ( newline4,65,056 ha-1). Interaction of drip irrigation at 0.8 ETo at germination + 1.0 ETo at newlinetillering + 1.75 ETo at canopy establishment + 2.0 ETo at grand gro