DOI: 10.1007/s10533-015-0172-6
Scopus记录号: 2-s2.0-84958657847
论文题名: Response of forest soil respiration to nutrient addition depends on site fertility
作者: Kang H. ; Fahey T.J. ; Bae K. ; Fisk M. ; Sherman R.E. ; Yanai R.D. ; See C.R.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 127, 期: 1 起始页码: 113
结束页码: 124
语种: 英语
英文关键词: Fine root
; Microbial
; Nitrogen
; Northern hardwood
; Phosphorus
Scopus关键词: carbon flux
; carbon monoxide
; fine root
; forest soil
; microbial activity
; mineralization
; nitrogen
; nitrogen cycle
; nutrient availability
; rhizosphere
; soil fertility
; soil organic matter
; soil respiration
; soil surface
; temperature effect
英文摘要: Flux of CO2 from the forest soil surface ((Formula presented.)) reflects the activity of roots and microbes responding to plant and soil properties that are influenced by global changes such as nitrogen deposition and increasing temperature and atmospheric CO2. We added low levels of N (3 g/m2-year), P (1 g/m2-year) or N + P to thirteen northern hardwood stands of different age and soil N cycling and measured soil respiration, microbial respiration and fine root turnover. We hypothesized that soil respiration would decline in response to nutrient addition, but that this response would vary depending on forest age and N cycling rate. Soil respiration was significantly higher in successional (<40-year-old) than mature stands (>90-year-old). Overall, no significant treatment effects or age x treatment interactions were observed. However, on an individual stand basis, significantly lower soil respiration was observed in nutrient addition plots at four of the most infertile sites. Over half of the variation in the response ratio (fertilized-control/control) of soil respiration to fertilization was explained by using pre-treatment N cycling rate as a predictor: i.e., the greatest reduction in soil respiration on N and N + P fertilized plots occurred on the sites with lowest pre-treatment soil N mineralization and litterfall N flux. Nutrient additions did not significantly affect either fine root turnover (minirhizotrons) or microbial respiration (laboratory incubations). Perhaps responses of fine root biomass or rhizosphere C flux influenced the response of soil respiration to increasing soil fertility. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83435
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China; Department of Natural Resources, Cornell University, G16 Fernow Hall, Ithaca, NY, United States; Department of Forest and Natural Resources Management, SUNY College of Environmental Science and Forestry, Syracuse, NY, United States; International Cooperation Division, International Affairs Bureau, Korea Forest Service, Daejeon, South Korea; Department of Biology, Miami University, Oxford, OH, United States
Recommended Citation:
Kang H.,Fahey T.J.,Bae K.,et al. Response of forest soil respiration to nutrient addition depends on site fertility[J]. Biogeochemistry,2016-01-01,127(1)