文献类型：期刊文献

英文题名：Elevated CO2 facilitates C and N accumulation in a rice paddy ecosystem

作者：Guo, Jia[1,2] Zhang, Mingqian[2,3] Wang, Xiaowen[1,4] Zhang, Weijian[2,5]

第一作者：Guo, Jia;郭嘉

通信作者：Wang, Xiaowen

机构：[1] Institute of Wetland Research, Chinese Academy of Forestry, Beijing, 100091, China; [2] Institute of Applied Ecology, Nanjing Agricultural University, Nanjing, 210095, China; [3] Technology Center of China Tobacco Fujian Industrial Co., Ltd., Xiamen, 361021, China; [4] Chinese Academy of Engineering, Beijing, 100088, China; [5] Institute of Crop Science, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Ecology, Physiology and Production, Ministry of Agriculture, Beijing, 100081, China

年份：2015

卷号：29

起止页码：27-33

外文期刊名：Journal of Environmental Sciences (China)

收录：EI(收录号：20151100623200);Scopus(收录号：2-s2.0-84924261002)

语种：英文

外文关键词：Carbon - Wetlands - Soils - Surface waters - Carbon dioxide - Ecosystems

摘要：Elevated CO2 can stimulate wetland carbon (C) and nitrogen (N) exports through gaseous and dissolved pathways, however, the consequent influences on the C and N pools are still not fully known. Therefore, we set up a free-air CO2 enrichment experiment in a paddy field in Eastern China. After five year fumigation, we studied C and N in the plant-water-soil system. The results showed: (1) elevated CO2 stimulated rice aboveground biomass and N accumulations by 19.1% and 12.5%, respectively. (2) Elevated CO2 significantly increased paddy soil TOC and TN contents by 12.5% and 15.5%, respectively in the 0-15cm layer, and 22.7% and 26.0% in the 15-30cm soil layer. (3) Averaged across the rice growing period, elevated CO2 greatly increased TOC and TN contents in the surface water by 7.6% and 11.4%, respectively. (4) The TOC/TN ratio and natural δ15N value in the surface soil showed a decreasing trend under elevated CO2. The above results indicate that elevated CO2 can benefit C and N accumulation in paddy fields. Given the similarity between the paddies and natural wetlands, our results also suggest a great potential for long-term C and N accumulation in natural wetlands under future climate patterns. ? 2015.