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Carbon trade-off and energy budgeting under conventional and conservation tillage in a rice-wheat double cropping system.
- Source :
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Journal of Environmental Management . Feb2024, Vol. 351, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
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Abstract
- Amid rising energy crises and greenhouse gas (GHG) emissions, designing energy efficient, GHG mitigation and profitable conservation farming strategies are pertinent for global food security. Therefore, we tested a hypothesis that no-till with residue retaining could improve energy productivity (EP) and energy use efficiency (EUE) while mitigating the carbon footprint (CF), water footprint (WF) and GHG emissions in rice-wheat double cropping system. We studied two tillage viz., conventional and conservation, with/without residue retaining, resulting as CT0 (puddled-transplanted rice, conventional wheat -residue), CTR (puddled-transplanted rice, conventional wheat + residue), NT0 (direct seeded rice, zero-till wheat -residue), and NTR (direct seeded rice, zero-till wheat + residue). The overall results showed that the NTR/NT0 had 34% less energy consumption and 1.2-time higher EP as compared to CTR/CT0. In addition, NTR increased 19.8% EUE than that of CT0. The grain yield ranged from 8.7 to 9.3 and 7.8–8.5 Mg ha−1 under CT and NT system, respectively. In NTR, CF and WF were 56.6% and 17.9% lower than that of CT0, respectively. The net GHG emissions were the highest (7261.4 kg CO 2 ha−1 yr−1) under CT0 and lowest (4580.9 kg CO 2 ha−1 yr−1) under NTR. Notably, the carbon sequestration under NTR could mitigate half of the system's CO 2 -eq emissions. The study results suggest that NTR could be a viable option to offset carbon emissions and water footprint by promoting soil organic carbon sequestration, and enhancing energy productivity and energy use efficiency in the South Asian Indo-Gangetic Plains. • Net GHG emissions were 58.5% greater in CT0 compared to NTR. • No-till with residue returning (NTR) decreased water and C footprints. • Overall, no-till had ∼18% less input cost than conventional tillage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03014797
- Volume :
- 351
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Management
- Publication Type :
- Academic Journal
- Accession number :
- 174686181
- Full Text :
- https://doi.org/10.1016/j.jenvman.2023.119888