Greenhouse gases emission,soil organic carbon and wheat yield as affected by tillage systems and nitrogen management practices |
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| Authors: | Chaitanya Prasad Nath Tapas Kumar Das Kuldeep Singh Rana Ranjan Bhattacharyya Himanshu Pathak Sangeeta Paul |
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| Institution: | 1. Division of Crop Production, ICAR–Indian Institute of Pulses Research, Kanpur, India;2. Division of Agronomy, ICAR–Indian Agricultural Research Institute, New Delhi, India;3. Centre for Environment Science and Climate Resilient Agriculture, ICAR–Indian Agricultural Research Institute, New Delhi, India;4. ICAR- Indian Agricultural Research Institute, Division of Microbiology, New Delhi, India |
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| Abstract: | Agricultural activities are responsible for greenhouse gases (GHGs) emission in the environment. Strategies are required to enhance the soil organic carbon (SOC) and nitrogen (N) sequestration to adapt and mitigate the climate change. We investigated GHGs emission, SOC and N enhancement under conventional tillage (CT) and zero tillage (ZT) with N management in wheat (Triticum aestivum L.). Seasonal carbon dioxide (CO2) emission and global warming potential (GWP) reduced for ZT treatments over CT without residues and 100% of required N with a blanket split application (CT – R + 100N). The ZT with 5 t ha?1 maize (Zea mays L.) residues retention and 75% of required N and GreenSeekerTM (GS)-aided N management (ZT + R + 75N + GS) reduced yield-scaled GHGs emission and increased total organic carbon (C) stock over CT – R + 100N. However, nitrous oxide (N2O) emission was lower in CT. The GS-based N management saved 26–35 kg N ha?1 in different tillage systems in both years over blanket application with higher N uptake and associated reduction in N2O emission. The study recommends that ZT with residues retention and GS-based N management can minimize the GHGs emission and improve the SOC. |
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| Keywords: | Carbon stock conservation tillage crop residues global warming potential sensor-based nitrogen |
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