globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13533
论文题名:
Different fates of deposited NH4+ and NO3− in a temperate forest in northeast China: a 15N tracer study
作者: Liu J.; Peng B.; Xia Z.; Sun J.; Gao D.; Dai W.; Jiang P.; Bai E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:6
起始页码: 2441
结束页码: 2449
语种: 英语
英文关键词: broad-leaved and Korean pine (Pinus koraiensis) mixed forest ; nitrogen deposition ; nitrogen fate ; nitrogen retention ; nitrogen saturation
Scopus关键词: Pinus koraiensis
英文摘要: Increasing atmospheric reactive nitrogen (N) deposition due to human activities could change N cycling in terrestrial ecosystems. However, the differences between the fates of deposited NH4+ and NO3- are still not fully understood. Here, we investigated the fates of deposited NH4+ and NO3-, respectively, via the application of 15NH4NO3 and NH4 15NO3 in a temperate forest ecosystem. Results showed that at 410 days after tracer application, most 15NH4+ was immobilized in litter layer (50 ± 2%), while a considerable amount of 15NO3- penetrated into 0–5 cm mineral soil (42 ± 2%), indicating that litter layer and 0–5 cm mineral soil were the major N sinks of NH4+ and NO3-, respectively. Broad-leaved trees assimilated more 15N under NH4 15NO3 treatment compared to under 15NH4NO3 treatment, indicating their preference for NO3- –N –N. At 410 days after tracer application, 16 ± 4% added 15N was found in aboveground biomass under 15NO3- treatment, which was twice more than that under 15NH4+ treatment (6 ± 1%). At the same time, approximately 80% added 15N was recovered in soil and plants under both treatments, which suggested that this forest had high potential for retention of deposited N. These results provided evidence that there were great differences between the fates of deposited NH4+ and NO3- , which could help us better understand the mechanisms and capability of forest ecosystems as a sink of reactive nitrogen. © 2016 John Wiley & Sons Ltd
资助项目: This work was supported by the National Basic Research Program of China (973 Program ; 2014CB954400), the National Natural Science Foundation of China (31522010 and 41175138), Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-DQC006). We are grateful to Yunting Fang, Qingkui Wang, and Xiaotao Lv for the discussions of the experimental design and the setup of the experimental plots.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60934
Appears in Collections:影响、适应和脆弱性

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作者单位: CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Liu J.,Peng B.,Xia Z.,et al. Different fates of deposited NH4+ and NO3− in a temperate forest in northeast China: a 15N tracer study[J]. Global Change Biology,2017-01-01,23(6)
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