Responses of C:N stoichiometry in plants, soil, and microorganisms to nitrogen addition
- PDF / 2,082,296 Bytes
- 11 Pages / 547.087 x 737.008 pts Page_size
- 4 Downloads / 184 Views
REGULAR ARTICLE
Responses of C:N stoichiometry in plants, soil, and microorganisms to nitrogen addition Yuan Sun & Cuiting Wang & Han Y. H. Chen & Honghua Ruan
Received: 13 May 2020 / Accepted: 12 September 2020 # Springer Nature Switzerland AG 2020
Abstract Background and aims The deposition of atmospheric N is expected to increase in the future; however, our understanding of the responses of C:N stoichiometry to N deposition in plants, soil, and microorganisms remains elusive. We aim to explore the general patterns and mechanisms of terrestrial C:N stoichiometry to N addition. Methods We present a global meta-analysis based on 827 paired observations from 183 studies to evaluate the responses of above- and belowground C and N concentrations ([C] and [N]) and C:N ratios across various ecosystems to N addition. Using linear mixed-effects Responsible Editor: Katharina Maria Keiblinger. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04717-8) contains supplementary material, which is available to authorized users.
models, we tested the effects of N input rates, experimental duration, ecosystem types and background climates on the responses. Results N addition increased [C] in plant shoots and soil, [N] in plant tissues and soil, but decreased microbial biomass [C], and C:N ratios in plant tissues, soil, and microbial biomass. These responses were more pronounced with higher N input rates and longer experimental durations. These N addition effects were similar among cropland, forest, and grassland ecosystems and were independent of background climates. Conclusions Our meta-analysis provided further evidence of the consistent responses of C:N stoichiometry in plants, soil, and microorganisms to N addition. Our results will be useful to modelling the responses of terrestrial C and N cycles to various N deposition scenarios.
Y. Sun : C. Wang : H. Ruan (*) College of Biology and the Environment, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, People’s Republic of China e-mail: [email protected]
Keywords Nitrogen deposition . Ecological stoichiometry . Terrestrial ecosystems . Soil microbial biomass . Plant-soil-microorganism
Y. Sun Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng City 224002 Jiangsu Province, China
Introduction
. Y. H. Chen Faculty of Natural Resource Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON P78 5E1, Canada
Global ambient atmospheric nitrogen (N) deposition is anticipated to increase in the future due to the widespread use of agricultural fertilizers and increased fossil fuel combustion (Galloway et al. 2008). Elevated N deposition has the potential to buffer the accumulation of atmospheric CO2 worldwide by increasing ecosystem carbon (C) storage; t
Data Loading...
