Effect of Subsurface Drip Fertigation Intervals and Fertilizer Levels on Yield andEconomics of Sugarcane

摘要

A field experiment was conducted at ZARS, V.C. Farm, Mandya during 2015-16 to know the effect of subsurface drip fertigation intervals and fertilizer levels on sugarcane. Results revealed that fertigation once in 2 days recorded significantly higher cane yield (281.41 ha~(-1)), millable canes nr1 row length (39.4), cane length (222.7 cm), internodes cane~(-1) (21), cane girth (10.1 cm) and single cane weight (2.57 kg) than fertigation once in 6 days, but was on par with fertigation once in 4 days inrespect of cane yield, millable canes nv1 length and single cane weight. Among the fertilizer levels of drip fertigation, 150 per cent RDF recorded significantly higher cane yield (283.11 ha~(-1)), millable canes m~(-1) row length (41.3), cane length (234.9 cm), internodes cane-1 (22.3), cane girth (10.07 cm), single cane weight (2.94 kg), than other fertilizer levels but was on par with 125 per cent RDF in case of cane yield. Higher cane yield (308.3 t ha~(-1)) and higher net returns 5,16,149 ha~(-1))with B: C ratio (3.18) were recorded with fertigation interval once in 2 days with 150 per cent RDF through WSF that increased the cane yield by 95 per cent over surface irrigation with 100 per cent RDF and subsurface fertigation with 75 per cent of RDFonce in two days interval recorded higher net returns ( 4,01,822 ha~(-1)) and increase in yield of 59 per cent over conventional method with saving of 25 per cent of fertilizers.