Modelled soil organic carbon stocks and changes in the Indo-Gangetic Plains,India from 1980 to 2030 |
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| Institution: | 1. NBSS&LUP, ICAR, Amravati Road, Nagpur 440010, India;2. The Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523-1499, USA;3. ISRIC World Soil Information, P.O. Box 353, 6700 AJ Wageningen, The Netherlands;4. The Department of Soil Science, The University of Reading, P.O. Box 233, Reading RG6 6DW, UK;5. The Agriculture and Environment Division, Rothamsted Research, Harpenden, Herts. AL5 2JQ, UK;6. The Met. Office, Hadley Centre for Climate Prediction and Research, Fitzroy Road, Exeter EX1 3PB, UK;1. ICAR Research Complex for NEH Region, Tripura Centre, Tripura, India;2. Carbon Management and Sequestration Centre, The Ohio State University, Columbus, USA;3. Institute of Agricultural Sciences, Banaras Hindu University,Kabir Colony, Varanasi, Uttar Pradesh, 221005, India;4. ICAR Research Complex for NEH Region, Umiam, Meghalaya, India;5. College of Agriculture, Tripura University, Tripura, India;1. International Rice Research Institute-India Office, NASC Complex, Pusa, New Delhi 110012, India;2. International Maize and Wheat Improvement Center, NASC Complex, Pusa, New Delhi 110012, India;3. Central Soil Salinity Research Institute, Karnal, Haryana 132001, India;4. Indian Agricultural Research Institute, Pusa, New Delhi 132001, India;5. International Maize and Wheat Improvement Center, Dhaka Office, Bangladesh;6. International Rice Research Institute, Los Baños, Philippines;1. ICAR-Central Soil Salinity Research Institute (ICACSSRI), Karnal, Haryana, India;2. Sri Karan Narendra Agriculture University, Jobner, Rajasthan, 303329, India;3. International Maize and Wheat Improvement Centre (CIMMYT), Dhaka, Bangladesh;4. International Maize and Wheat Improvement Centre (CIMMYT), NASC Complex, Pusa, New Delhi, India;5. International Maize and Wheat Improvement Centre (CIMMYT), Kathmandu, Nepal;1. Department of Environmental Sciences, Faculty of Agriculture and Environment, The University of Sydney, Biomedical Building C81, Central Avenue, Australian Technology Park, Eveleigh, NSW 2015, Australia;2. National Soil Resources Institute, Cranfield University, MK45 4DT England, UK |
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| Abstract: | The Global Environment Facility co-financed Soil Organic Carbon (GEFSOC) Project developed a comprehensive modelling system for predicting soil organic carbon (SOC) stocks and changes over time. This research is an effort to predict SOC stocks and changes for the Indian, Indo-Gangetic Plains (IGP), an area with a predominantly rice (Oryza sativa)–wheat (Triticum aestivum) cropping system, using the GEFSOC Modelling System and to compare output with stocks generated using mapping approaches based on soil survey data. The GEFSOC Modelling System predicts an estimated SOC stock for the IGP, India of 1.27, 1.32 and 1.27 Pg for 1990, 2000 and 2030, respectively, in the top 20 cm of soil. The SOC stock using a mapping approach based on soil survey data was 0.66 and 0.88 Pg for 1980 and 2000, respectively. The SOC stock estimated using the GEFSOC Modelling System is higher than the stock estimated using the mapping approach. This is due to the fact that while the GEFSOC System accounts for variation in crop input data (crop management), the soil mapping approach only considers regional variation in soil texture and wetness. The trend of overall change in the modelled SOC stock estimates shows that the IGP, India may have reached an equilibrium following 30–40 years of the Green Revolution. This can be seen in the SOC stock change rates. Various different estimation methods show SOC stocks of 0.57–1.44 Pg C for the study area. The trend of overall change in C stock assessed from the soil survey data indicates that the soils of the IGP, India may store a projected 1.1 Pg of C in 2030. |
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