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Indian Journal of Agronomy
Year : 2005, Volume : 50, Issue : 4
First page : ( 281) Last page : ( 284)
Print ISSN : 0537-197X.

Effect of irrigation scheduling on performance of summer legumes grown in association of sugarcane

Rana N.S., Kumar Sanjay, Saini S.K.

Department of Agronomy, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttaranchal 263 145.

Received:  July,  2003.

Abstract

A field experiment was conducted during 2001–03 to find out an optimum irrigation schedule for intercrops grown in association with spring sugarcane, on silty clay-loam soil, having 23.4% moisture at field capacity and 8.6% at permanent wilting point (PWP). Daily evapotranspiration (ET) varied from 3.3 to 16.8 mm/day. Mungbean (Phaseolus radiatus L.), urdbean (P. mungo L.) and cowpea [Vigna unguiculata (L.) Walp.] gave highest yield of 4.1, 3.85 q/ha and 73.0 q/ha, respectively with irrigation at, IW: CPE ratio of 1.2 compared to 3.25, 2.75 and 6.10 q/ha with irrigations at flowering and pod-filling stage. All the intercrops reduced cane yield due to decline in number of millable canes and cane weight. Mean reduction in cane yield was 14.2% with cowpea, 11.5% with urdbean and 9.2% with mungbean. Irrigation at 1.2 IW: CPE ratio resulted in highest cane yield of 97.0 tonnes/ha, being respectively 3.7, 8.1 and 13.3% higher than IW: CPE ratio of 1.0, 0.8, and irrigations at critical growth stages. Sugarcane + cowpea gave highest mean cane-equivalent yield (107.0 tonnes/ha), being 6.8, 10.0, and 8.7% more than sole sugarcane and intercropping with urdbean and mungbean respectively. Sugarcane intercropped with cowpea gave highest gross return of Rs 101,650/ha followed by sugarcane alone (Rs 95,190) as against Rs 92,435 with sugarcane + urdbean. Respective Benefit: cost ratio was 0.89, 0.90 and 0.73. Irrigation applied at 1.2 IW: CPE ratio gave significantly highest cane-equivalent yield (109.5 tonnes/ha) with benefit: cost ratio of 0.85 as against 92.4 tonnes/ha and 0.77 with irrigation at critical growth stages of intercrops.

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Key words

Sugarcane, Intercropping, IW: CPE ratio, CEY, Monetary returns.

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