Journal
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
Volume 63, Issue 12, Pages 1644-1660Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03650340.2017.1300657
Keywords
Carbon stock; conservation tillage; crop residues; global warming potential; sensor-based nitrogen
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Funding
- ICAR-Indian Agricultural Research Institute (IARI)
- ICAR-Indian Agricultural Research Institute
- Department of Science and Technology (DST), Govt. of India
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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 5t ha(-1) maize (Zea mays L.) residues retention and 75% of required N and GreenSeeker(TM) (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 26-35kg 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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