Atmospheric CO2 Enrichment and Reactive Nitrogen Inputs Interactively Stimulate Soil Cation Losses and Acidification
- Li ZhangLi ZhangDepartment of Entomology & Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695, United StatesInstitute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, ChinaMore by Li Zhang,
- Yunpeng QiuYunpeng QiuDepartment of Entomology & Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695, United StatesCollege of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaMore by Yunpeng Qiu,
- Lei Cheng ,
- Yi WangYi WangState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, ChinaMore by Yi Wang,
- Lingli LiuLingli LiuState Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, ChinaMore by Lingli Liu,
- Cong TuCong TuDepartment of Entomology & Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695, United StatesDepartment of Biological and Agricultural Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States,More by Cong Tu,
- Dan C. BowmanDan C. BowmanDepartment of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States,More by Dan C. Bowman,
- Kent O. BurkeyKent O. BurkeyDepartment of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina 27695, United States,United States Department of Agriculture, Agricultural Research Service, Plant Science Research Unit, Raleigh, North Carolina 27607, United StatesMore by Kent O. Burkey,
- Xinmin BianXinmin BianInstitute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, ChinaMore by Xinmin Bian,
- Weijian ZhangWeijian ZhangInstitute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095, ChinaMore by Weijian Zhang, and
- Shuijin Hu*Shuijin Hu*Phone: 1-919-515-2097; e-mail: [email protected]Department of Entomology & Plant Pathology, North Carolina State University, Raleigh, North Carolina 27695, United StatesCollege of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, ChinaMore by Shuijin Hu
Abstract
Reactive N inputs (Nr) may alleviate N-limitation of plant growth and are assumed to help sustain plant responses to the rising atmospheric CO2 (eCO2). However, Nr and eCO2 may elicit a cascade reaction that alters soil chemistry and nutrient availability, shifting the limiting factors of plant growth, particularly in acidic tropical and subtropical croplands with low organic matter and low nutrient cations. Yet, few have so far examined the interactive effects of Nr and eCO2 on the dynamics of soil cation nutrients and soil acidity. We investigated the cation dynamics in the plant–soil system with exposure to eCO2 and different N sources in a subtropical, acidic agricultural soil. eCO2 and Nr, alone and interactively, increased Ca2+ and Mg2+ in soil solutions or leachates in aerobic agroecosystems. eCO2 significantly reduced soil pH, and NH4+-N inputs amplified this effect, suggesting that eCO2-induced plant preference of NH4+-N and plant growth may facilitate soil acidification. This is, to our knowledge, the first direct demonstration of eCO2 enhancement of soil acidity, although other studies have previously shown that eCO2 can increase cation release into soil solutions. Together, these findings provide new insights into the dynamics of cation nutrients and soil acidity under future climatic scenarios, highlighting the urgency for more studies on plant–soil responses to climate change in acidic tropical and subtropical ecosystems.
Cited By
This article is cited by 5 publications.
- Yunpeng Qiu, Yu Jiang, Lijin Guo, Lin Zhang, Kent O. Burkey, Richard W. Zobel, S. Chris Reberg-Horton, H. David Shew, Shuijin Hu. Shifts in the Composition and Activities of Denitrifiers Dominate CO2 Stimulation of N2O Emissions. Environmental Science & Technology 2019, 53 (19) , 11204-11213. https://doi.org/10.1021/acs.est.9b02983
- Shijie Li, Fuwei Wang, Mengfei Chen, Zhengyi Liu, Luyao Zhou, Jun Deng, Changjun Dong, Guocheng Bao, Tongshuo Bai, Zhen Li, Hui Guo, Yi Wang, Yunpeng Qiu, Shuijin Hu. Mowing alters nitrogen effects on the community-level plant stoichiometry through shifting plant functional groups in a semi-arid grassland. Environmental Research Letters 2020, 15 (7) , 074031. https://doi.org/10.1088/1748-9326/ab8a87
- Yansheng Li, Zhenhua Yu, Songchao Yang, Guanghua Wang, Xiaobing Liu, Chunyu Wang, Zhihuang Xie, Jian Jin. Impact of elevated CO2 on C:N:P ratio among soybean cultivars. Science of The Total Environment 2019, 694 , 133784. https://doi.org/10.1016/j.scitotenv.2019.133784
- Yunfa Qiao, Shujie Miao, Qi Li, Jian Jin, Xiaosan Luo, Caixian Tang. Elevated CO2 and temperature increase grain oil concentration but their impacts on grain yield differ between soybean and maize grown in a temperate region. Science of The Total Environment 2019, 666 , 405-413. https://doi.org/10.1016/j.scitotenv.2019.02.149
- Patricia A. Holden, Monika Mortimer, Ying Wang. Engineered nanomaterials and symbiotic dinitrogen fixation in legumes. Current Opinion in Environmental Science & Health 2018, 6 , 54-59. https://doi.org/10.1016/j.coesh.2018.07.012