DOI: 10.1111/nph.16298
论文题名: Plant-mediated effects of elevated CO2 and rice cultivars on soil carbon dynamics in a paddy soil
作者: Hu Z. ; Chen X. ; Yao J. ; Zhu C. ; Zhu J. ; Liu M.
刊名: New Phytologist
ISSN: 0028646X
出版年: 2020
卷: 225, 期: 6 语种: 英语
英文关键词: carbon (C) use efficiency
; cultivar varieties
; global change
; microbial community
; plant productivity
; rice
; soil organic carbon
Scopus关键词: agricultural soil
; carbon dioxide enrichment
; carbon sequestration
; cultivar
; experimental study
; global change
; microbial community
; nutrient use efficiency
; paddy field
; rice
; soil carbon
; soil quality
英文摘要: Soil organic carbon (SOC) sequestration under elevated CO2 concentration (eCO2) is a function of carbon (C) input and C retention. Nitrogen (N) limitation in natural ecosystems can constrain plant responses to eCO2 and their subsequent effects on SOC, but the effect of eCO2 on SOC in N-enriched agroecosystems with cultivars highly responsive to eCO2 is largely unknown. We reported results of SOC dynamics from a field free-air CO2 enrichment experiment with two rice cultivars having distinct photosynthetic capacities under eCO2. A reciprocal incubation experiment was further conducted to disentangle the effect of changes in litter quality and soil microbial community on litter-derived C dynamics. eCO2 significantly increased total SOC content, dissolved organic C and particulate organic C under the strongly responsive cultivar, likely due to enhanced organic C inputs originated from CO2 stimulation of shoot and root biomass. Increases in the residue C : N ratio and fungal abundance induced by eCO2 under the strongly responsive cultivar reduced C losses from decomposition, possibly through increasing microbial C use efficiency. Our findings suggest that applications of high-yielding cultivars may substantially enhance soil C sequestration in rice paddies under future CO2 scenarios. © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158929
Appears in Collections: 气候变化与战略
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作者单位: Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Key Laboratory for Solid Organic Waste Resource Utilization, Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
Recommended Citation:
Hu Z.,Chen X.,Yao J.,et al. Plant-mediated effects of elevated CO2 and rice cultivars on soil carbon dynamics in a paddy soil[J]. New Phytologist,2020-01-01,225(6)