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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1111/nph.17041
|2 doi
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|a pubmed24n1055.xml
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|a (NLM)33112419
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|a DE-627
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|e rakwb
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|a eng
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|a Wang, Xin
|e verfasserin
|4 aut
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|a Canopy processing of N deposition increases short-term leaf N uptake and photosynthesis, but not long-term N retention for aspen seedlings
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 14.05.2021
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|a Date Revised 14.05.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2020 The Authors New Phytologist © 2020 New Phytologist Foundation.
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|a Forest canopies can retain nitrogen (N) from atmospheric deposition. However, most empirical and modeling studies do not consider the processing of the N deposited in the canopy. To assess whether N deposition through canopy will alter the plant's N uptake and retention, we conducted a 3-yr mesocosm experiment by applying (15 NH4 )2 SO4 solution to aspen sapling canopies or directly to the soil. We found that 15 N-NH4+ applied to the canopy was directly taken up by leaves. Compared with the soil N application, the canopy N application resulted in higher photosynthesis but lower N retention of the plant-soil system in the first growing season. Plant biomass, N concentration, and leaf N resorption were not significantly different between the canopy and soil N applications. The partitioning of retained 15 N among plant components and soil layers was similar between the two treatments 3 yr after the N application. Our findings indicated that the canopy N processing could alter leaf N supply and photosynthesis in the short term but not N retention in the long term. Under natural conditions, the chronic N deposition could continuously refill the canopy N pool, causing a sustained increase in canopy carbon uptake. Canopy N processing needs to be considered for accurately predicting the impact of N deposition
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a 15N labeling
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|a canopy nitrogen uptake
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|a leaf photosynthesis
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|a nitrogen allocation
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|a nitrogen deposition
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|a soil nitrogen addition
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|a stable isotope
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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| 700 |
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|a Wang, Bin
|e verfasserin
|4 aut
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|a Wang, Chengzhang
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Zhenhua
|e verfasserin
|4 aut
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|a Li, Jing
|e verfasserin
|4 aut
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|a Jia, Zhou
|e verfasserin
|4 aut
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|a Yang, Sen
|e verfasserin
|4 aut
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|a Li, Ping
|e verfasserin
|4 aut
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|a Wu, Yuntao
|e verfasserin
|4 aut
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|a Pan, Shengnan
|e verfasserin
|4 aut
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|a Liu, Lingli
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 229(2021), 5 vom: 01. März, Seite 2601-2610
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:229
|g year:2021
|g number:5
|g day:01
|g month:03
|g pages:2601-2610
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|u http://dx.doi.org/10.1111/nph.17041
|3 Volltext
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