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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 6
First page : (862) Last page : (868)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7218

Evaluation of Suitable Fertigation Interval and Fertilizer Level for Sugarcane under Subsurface Drip Fertigation

Ningaraju, G. K.*, Shankaralingappa, B. C., Nagaraju and Ramachandra, C.

Department of Agronomy, UAS, GKVK, Bengaluru-560065
*Corresponding Author E-mail: rajuagron@gmail.com
Received: 6.11.2018 | Revised: 10.12.2018 | Accepted: 16.12.2018  

 ABSTRACT

A field experiment was conducted during 2015-16 and 2016-17 at Zonal Agricultural Research Station, V.C. Farm, Mandya to find out the suitable fertigation interval and optimum fertilizer level for sugarcane under subsurface drip fertigation. The treatment combinations consisting of three fertigation intervals (fertigation once in 2, 4, and 6 days) and four fertilizer levels (75, 100, 125 and 150% of recommended dose of fertilizers) along with conventional method of sugarcane cultivation were replicated thrice in factorial RCBD. Results indicated that, fertigation once in 2 days with 150 per cent RDF produced significantly 95.1 and 99.5 per cent higher cane yield (308.3 t ha-1 and 291.3 t ha-1 in plant and ratoon cane, respectively) than conventional method of cultivation (158.0 and 146.0 t ha-1), fertigation once in 6 days with all levels of RDF, fertigation once in 2 or 4 days with 75 and 100 per cent RDF and was on par with fertigation once in 2 days with 125 per cent RDF and fertigation once in 4 days with 150 and 125 per cent RDF. Higher water use efficiency (2.58 and 2.40 t ha-cm-1) with water saving of 56.23 per cent, higher net returns (Rs. 5,16,149 ha-1 and Rs. 5,34,527 ha-1) and B:C ratio (3.18 and 3.95) in plant cane and ratoon cane, respectively were obtained with fertigation once in 2 days with 150 per cent RDF than conventional method (Rs. 2,36,618 and Rs. 2,29,300 ha-1 and 2.07 and 2.15) and other combinations of fertigation intervals and fertilizer levels under subsurface fertigation in sugarcane.

Key words: Fertigation intervals, Fertilizer levels, Sugarcane, Yield and Water use efficiency.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ningaraju, G.K., Shankaralingappa, B.C., Nagaraju and Ramachandra, C., Evaluation of Suitable Fertigation Interval and Fertilizer Level for Sugarcane under Subsurface Drip Fertigation, Int. J. Pure App. Biosci.6(6): 862-868 (2018). doi: http://dx.doi.org/10.18782/2320-7051.7218