Energy and productivity analysis of maize based crop sequences compared to rice-wheat system under different moisture regimes

Navneet Kaur, Krishan Kumar Vashist and A.S. Brar

Energy, 2021, vol. 216, issue C

Abstract: Energy efficiency in agriculture needs to be improved to reduce the dependence on non-renewable sources. The energy flow of eight different crop sequences: rice-wheat, maize-wheat, maize-potato-mentha + onion, maize + cowpea(f)-potato-mentha + onion, maize + cowpea (f)-potato-spring maize, maize + cowpea(f)-gobhi sarson-summer moong, maize-gobhi sarson + toria-summer moong and maize + cowpea(f)-gobhi sarson + toria-summer moong with four irrigation regimes of irrigation water/cumulative pan evaporation ratios 0.75, 1.0, 1.25 and recommended schedule was carried out at Ludhiana, Punjab. Potato was the most energy intensive (44.59 GJ ha−1) while gobhi sarson (11.14 GJ ha−1) and summer moong (7.04 GJ ha−1) were much more extensive crops. The highest irrigation water energy requiring crop was the rice under the recommended irrigation schedule. Maize + cowpea(f)-gobhi sarson-summer moong crop sequence was found to be the most energy efficient (53.57). The lowest energy efficiency was reported with maize-potato-mentha + onion (21.31). Energy productivity increased with increase in amount of irrigation water applied. The most energy productive cropping sequence was maize + cowpea (f)-gobhi sarson-summer moong with IW/CPE ratio of 1.25 irrigation schedule. Improved energy efficiency with maize + cowpea(f)-gobhi sarson-summer moong in conjunction with I1.25 and IRec suggests the adoption of alternative cropping sequences compared to rice-wheat system to reduce the irrigation water requirement.

Keywords: Energy efficiency; Energy productivity; Energy profitability; Energetics; Crop sequences; Irrigation regimes and maize (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:216:y:2021:i:c:s0360544220323938

DOI: 10.1016/j.energy.2020.119286

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