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Energy auditing of long-term conservation agriculture based irrigated intensive maize systems in semi-arid tropics of India

By: Parihar, C.M.
Contributor(s): Jat, S.L | Singh, A. K | Kumar, B | Rathore, N.S | Jat, M.L | Saharawat, Y.S | Kuri, B.R.
Material type: materialTypeLabelArticlePublisher: United Kingdom : Elsevier, 2018Subject(s): Conservation agriculture | Irrigation systems | IndiaOnline resources: Access only for CIMMYT Staff In: Energy v. 142, p. 289-302Summary: In a 7-year study, we assessed the conservation agriculture (CA) practices [permanent bed (PB) and zero tillage (ZT)] and conventional till (CT) in 4-diversified maize rotations [maize-wheat-mungbean (MWMb), maize-chickpea-Sesbania green manure (MCS), maize-mustard-mungbean (MMuMb) and maize-maize-Sesbania green manure (MMS)]. Results showed that ZT and PB plots consumed lower energy (7 yr average) in land preparation (49.7–51.5%) and irrigation (16.8–22.9%) compared to CT. Significantly higher system output (10.6–14.5%) and net energy (14.8–18.9%) returns, biomass productivity (9.9–14.1%), energy use-efficiency (13.4–17.1%), and bio-energetic based adult equivalent yield (17.3–19.8%) was recorded in ZT and PB than the CT. Among the crop rotation plots the net energy-output (35,3346 MJ ha−1), biomass yield (11.87 Mg ha−1), energy use efficiency (4.16), and bio-energetic based adult equivalent yield (46 adults ha−1 year−1) was recorded significantly (P ≤ 0.05) higher in MWMb plots. Interaction between tillage and crop rotations were significant (P ≤ 0.05) for mean system output and net energy returns, biomass productivity and bio-energetic based adult equivalent yield. Thus, our long-term study suggests that CA practices with diversified maize based rotation (MWMb) could be a feasible alternative to attain high energy-use efficiency, biomass productivity and bio-energetic based adult equivalent yield in north-western India and other similar agro-ecologies of South Asia.
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Article CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

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In a 7-year study, we assessed the conservation agriculture (CA) practices [permanent bed (PB) and zero tillage (ZT)] and conventional till (CT) in 4-diversified maize rotations [maize-wheat-mungbean (MWMb), maize-chickpea-Sesbania green manure (MCS), maize-mustard-mungbean (MMuMb) and maize-maize-Sesbania green manure (MMS)]. Results showed that ZT and PB plots consumed lower energy (7 yr average) in land preparation (49.7–51.5%) and irrigation (16.8–22.9%) compared to CT. Significantly higher system output (10.6–14.5%) and net energy (14.8–18.9%) returns, biomass productivity (9.9–14.1%), energy use-efficiency (13.4–17.1%), and bio-energetic based adult equivalent yield (17.3–19.8%) was recorded in ZT and PB than the CT. Among the crop rotation plots the net energy-output (35,3346 MJ ha−1), biomass yield (11.87 Mg ha−1), energy use efficiency (4.16), and bio-energetic based adult equivalent yield (46 adults ha−1 year−1) was recorded significantly (P ≤ 0.05) higher in MWMb plots. Interaction between tillage and crop rotations were significant (P ≤ 0.05) for mean system output and net energy returns, biomass productivity and bio-energetic based adult equivalent yield. Thus, our long-term study suggests that CA practices with diversified maize based rotation (MWMb) could be a feasible alternative to attain high energy-use efficiency, biomass productivity and bio-energetic based adult equivalent yield in north-western India and other similar agro-ecologies of South Asia.

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