The undefined N source might be overestimated by 15 N tracer trials
© 2020 John Wiley & Sons Ltd.
Veröffentlicht in: | Global change biology. - 1999. - 27(2021), 3 vom: 21. Feb., Seite 467-468 |
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1. Verfasser: | |
Weitere Verfasser: | , |
Format: | Online-Aufsatz |
Sprache: | English |
Veröffentlicht: |
2021
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Zugriff auf das übergeordnete Werk: | Global change biology |
Schlagworte: | Letter Comment Fertilizers Soil Nitrogen N762921K75 |
Zusammenfassung: | © 2020 John Wiley & Sons Ltd. Based on data from previous 15 N-tracer trials, Yan et al. (Global Change Biology, 26, 191-199; 2020) accounted the sources of cereal crop nitrogen (N) from fertilizer inputs (from both current and previous seasons) and possible uptake of nonfertilizer N inputs, leaving a significant part of N source undefined. We argue that the undefined N source does not reflect the net change in soil N stock and might be overestimated for three reasons: (a) higher yield in 15 N tracer trials; (b) a low residue return rate is assumed; (c) underestimated contribution by fertilizer inputs from previous seasons due to the lack of long-term trials |
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Beschreibung: | Date Completed 21.04.2021 Date Revised 21.04.2021 published: Print-Electronic CommentOn: Glob Chang Biol. 2020 Jan;26(1):191-199. - PMID 31789452 Citation Status MEDLINE |
ISSN: | 1365-2486 |
DOI: | 10.1111/gcb.15371 |