Greenhouse gas emissions from a wastewater sludge-amended soil cultivated with wheat (Triticum spp. L.) as affected by different application rates of charcoal |
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| Institution: | 1. Salt-soil Agricultural Center, Key Laboratory of Agricultural Environment in the Lower Reaches of Yangtze River Plain, Institute of Agricultural Resource and Environment, Jiangsu Academy of Agriculture Sciences (JAAS), No. 50, Zhongling Rd, Nanjing 210014, PR China;2. Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Yancheng Teachers University, Yancheng City 224002, PR China;3. College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao 266000, PR China;4. Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, PR China;5. Institute of Agricultural Science in the Coastal Area Jiangsu, Kaifang Avenue No. 59, Yancheng 224002, PR China;1. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;2. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;3. Red Soil Institute of Jiangxi Province, Jinxian 331717, China;1. Department of Forest Management, W.A. Franke College of Forestry and Conservation, University of Montana, Missoula, MT, USA;2. Department of Ecosystem and Conservation Sciences, W.A. Franke College of Forestry and Conservation Sciences, University of Montana, Missoula, MT, USA |
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| Abstract: | Applying biochar to soil is an easy way to sequester carbon in soil, while it might reduce greenhouse gas (GHG) emissions and stimulate plant growth. The effect of charcoal application (0, 1.5, 3.0 and 4.5%) on GHG emission was studied in a wastewater sludge-amended arable soil (Typic Fragiudepts) cultivated with wheat (Triticum spp. L.) in a greenhouse. The application of charcoal at ≥1.5% reduced the CO2 emission rate significantly ≥37% compared to unamended soil (135.3 g CO2 ha?1 day?1) in the first two weeks, while the N2O emission rate decreased 44% when 4.5% charcoal was added (0.72 g N2O ha?1 day?1). The cumulative GHG emission over 45 days was 2% lower when 1.5% charcoal, 34% lower when 3.0% charcoal and 39% lower when 4.5% charcoal was applied to the sludge-amended soil cultivated with wheat. Wheat growth was inhibited in the charcoal-amended soil compared to the unamended soil, but not yields after 135 days. It was found that charcoal addition reduced the emissions of N2O and CO2, and the cumulative GHG emissions over 45 days, without altering wheat yield. |
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