Responses of dissolved organic carbon and dissolved nitrogen in surface water and soil to CO2 enrichment in paddy field |
| |
| Authors: | Jia Guo Mingqian Zhang Li Zhang Aixing Deng Xinmin Bian Jianguo Zhu Weijian Zhang |
| |
| Institution: | 1. Institute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, China;2. Institute of Crop Science, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Ecology, Physiology & Production, Ministry of Agriculture, Beijing 100081, China;3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;1. Departament of Soil Microbiology and Symbiotic Systems, Estación Experimental Del Zaidín (CSIC), Profesor Albareda No 1, 18008, Granada, Spain;2. Division of Plant Sciences University of Missouri, 1-66 Ag Building, Columbia, MO, 65211, USA;3. Instituto de Agrobiotecnología (IdAB), Universidad Pública de Navarra-CSIC- Gobierno de Navarra, Avenida Pamplona 123, E-31192, Mutilva Baja, Spain;4. Plant Breeding and Phenomic Center, Faculty of Agricultural Sciences, Universidad de Talca, Talca, Chile;5. Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. de La Coruña Km. 7.5, 28040, Madrid, Spain;6. Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona and AGROTECNIO Center, Lleida. Av. Diagonal 645, 08028, Barcelona, Spain;7. Department of Environmental Biology. Sciences and Pharmacy Faculties, University of Navarra, Irunlarrea 1, 31008, Pamplona, Spain;1. College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China;2. Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USA;3. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China;1. Institute of Geography, Fujian Normal University, Fuzhou 350007, China;2. Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, China;3. CSIC, Global Ecology Unit CREAF-CEAB-CSIC-UAB, 08913 Cerdanyola del Vallès, Catalonia, Spain;4. CREAF, 08913 Cerdanyola del Vallès, Catalonia, Spain;1. Thünen Institute of Biodiversity, Bundesallee 50, D-38116 Braunschweig, Germany;2. Deutsche Agrarforschungsallianz (DAFA), German Agricultural Research Alliance, c/o Thünen Institute, Braunschweig, Germany;3. Institute of Crop Science, Quality of Plant Products, University of Hohenheim, Emil-Wolff-Str. 25, D-70599 Stuttgart, Germany;1. Key Laboratory of Ministry of Agriculture on Agro-environment and Climate Change, Agro-environment and Sustainable Development Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2. College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi, China;3. Crop and Soil Science Section, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia;4. Institute of Meteorological Sciences of Liaoning Province, Shenyang 110166, China;5. Walker Institute for Climate Systems Research, School of Agriculture, Policy and Development, University of Reading, RG6 6AR, United Kingdom;1. Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, 430072, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | Increasing evidences have shown that dissolved organic components are responsible for the significant C and N exports from terrestrial ecosystems to the surrounding aquatic ecosystems and very sensitive to CO2 enrichment. However, there is still a lack of direct evidence about CO2-led effects on these components at the ecosystem scale, especially in wetlands. We, therefore, simultaneously investigated the contents of dissolved organic carbon (DOC) and dissolved nitrogen (DN) in the surface water and soil layer in a paddy field under FACE facility in Eastern China. Elevated CO2 significantly increased the contents of DOC and DN in the surface water by 18.0% and 14.3% on average. Elevated CO2 also increased DOC content in the soil, but decreased DN content. The contents of DOC and DN in the soil–water interface of 0–1 cm soil layer were on average 22.4% and 47.5% higher than in the 5–15 cm soil layer. Besides, significant higher DOC and DN contents existed in the soil porewater than in the surface water. Due to multiple drainage regime and rainstorm-induced runoffs in rice cropping regions, CO2-led DOC and DN increments in the surface water may increase C and N exports from paddies to the surrounding aquatic ecosystems under future climate patterns. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
