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| Influence of Soluble Carbon and Nitrogen Additions on N2O and CO2 Emissions from Two Soils with Different Organic Carbon Content |
| Received:August 02, 2015 |
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| KeyWord:soil organic carbon content;soluble carbon;nitrous oxide;carbon dioxide |
| Author Name | Affiliation | E-mail | | TIAN Ya-nan | College of Recourses and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | | | ZHANG Shui-qing | College of Recourses and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China
Institute of Plant Nutrition and Environmental Resources Science, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China | | | LIN Shan | College of Recourses and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | linshan@mail.hzau.edu.cn | | Muhammad Shaaban | College of Recourses and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | | | HE Zhi-long | College of Recourses and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | |
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| Abstract: |
| A laboratory study was conducted to evaluate the influence of soluble carbon and nitrogen additions on N2O and CO2 emissions from two soils with different organic carbon content:yellow brown soil(higher organic carbon) and purple soil(lower organic carbon). Five treatments were designed as follows:control(CK), low N(LN), high N(HN), low N + soluble C(LNC), high N + soluble C(HNC). Results showed that N2O and CO2 emissions from yellow brown soil were higher than those from purple soil, due to higher organic C content in yellow brown soil. Additions of nitrogen significantly enhanced N2O emissions from both soils, compared with the control treatment. In purple soil, the N2O emissions had significant positive correlation with N rate, whereas the maximum N2O emission was observed in LN treatment in yellow brown soil. Compared with single N treatments, additions of both N and C lowered N2O emissions in purple soil at two N rates, but such effect was observed in yellow brown soil only at LNC treatment. Addition of soluble carbon significantly increased CO2 emissions in both soils, whereas nitrogen additions did not obviously influence CO2 emissions. Highly significant and positive correlation between N2O and CO2 emissions was found in yellow brown soil, but not in purple soil. These results demonstrate that the additions of soluble carbon and nitrogen have stimulating effects on soil respiration and nitrification-denitrification intensity. |
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