Abstract

A field experiment was conducted in ICAR Research Complex at Goa, during 1999-2002 to study the energy input-output relationships of different rice based cropping systems with recycled manurial resources in a split-plot design with three replications. Among the cropping systems tried, rice- brinjal system received relatively higher energy input (23,135 MJ ha) that too from the non-renewable energy sources (14,909 MJ ha-1). However, the treatment could also yield substantially higher energy output (1,57,269 MJ ha). The use of recycled manures particularly paddy straw with mushroom spent substrate accounted for higher energy output although it recorded higher energy input (21,062 MJ ha). Rice-brinjal cropping system recorded better energy efficiency with additional input of energy in terms of irrigation which was mainly due to the higher productivity of the cropping system. In contrast, rice-sunnhemp and rice-fallow systems revealed lower energy input but ultimately their energy output was also lower.

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