Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition
Abstract Nitrogen (N) deposition might alleviate degradation of alpine grassland caused by N limitation on the Tibetan Plateau (TP). To determine such limitation and quantify the N-induced N retention in plant, a six-year fertilization experiment with six levels of N addition rates (0, 1, 2, 4, 8 an...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | English |
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Nature Portfolio
2023-01-01
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| Colección: | Scientific Reports |
| Acceso en línea: | https://doi.org/10.1038/s41598-023-27392-y |
| _version_ | 1828056926744739840 |
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| author | Jiaoneng Yu Xu-Ri Songbo Qu Fengzi Li Da Wei Almaz Borjigidai |
| author_facet | Jiaoneng Yu Xu-Ri Songbo Qu Fengzi Li Da Wei Almaz Borjigidai |
| author_sort | Jiaoneng Yu |
| collection | DOAJ |
| description | Abstract Nitrogen (N) deposition might alleviate degradation of alpine grassland caused by N limitation on the Tibetan Plateau (TP). To determine such limitation and quantify the N-induced N retention in plant, a six-year fertilization experiment with six levels of N addition rates (0, 1, 2, 4, 8 and 16 g N m−2 yr−1) was conducted in the Namco alpine steppe and additional 89 experiments with multi-level N addition were also synthesized worldwide among which 27 sites were on the TP. In general, N addition promoted N retention in plants, and this increasing trend diminished at the critical N rate (Ncr). The maximum N retention capacity (MNRC) of plants at Ncr was strongly correlated with initial aboveground net primary productivity with a slope of 0.02, and the MNRC of grasslands globally ranged from 0.35 to 42.59 g N m−2 yr−1, approximately account for 39% of Ncr. Tibetan alpine grassland had a low average MNRC (2.24 g N m−2 yr−1) with distinct regional characteristic, which was much lower in the western TP (0.80 g N m−2 yr−1) than the eastern TP (4.10 g N m−2 yr−1). Our results inferred 0.33–1.21 Tg N yr−1 (0.22–0.79 g N m−2 yr−1) can be retained and 5.65–20.11 Tg C yr−1 (3.67–13.06 g C m−2 yr−1) can be gained by Tibetan alpine grasslands under current N deposition level. With the aggravation of N deposition, the alpine steppe ecosystem might continuously absorb N and C until N deposition reaches Ncr. |
| first_indexed | 2024-04-10T21:03:10Z |
| format | Article |
| id | doaj.art-62d97a1042c4458c8ce42c1a9b6937f6 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-10T21:03:10Z |
| publishDate | 2023-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-62d97a1042c4458c8ce42c1a9b6937f62023-01-22T12:09:36ZengNature PortfolioScientific Reports2045-23222023-01-0113111310.1038/s41598-023-27392-yPlant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen additionJiaoneng Yu0Xu-Ri1Songbo Qu2Fengzi Li3Da Wei4Almaz Borjigidai5Key Laboratory of Ethnomedicine, Ministry of Education, Minzu University of ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of SciencesKey Laboratory of Ethnomedicine, Ministry of Education, Minzu University of ChinaState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of SciencesState Key Laboratory of Tibetan Plateau Earth System, Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of SciencesKey Laboratory of Ethnomedicine, Ministry of Education, Minzu University of ChinaAbstract Nitrogen (N) deposition might alleviate degradation of alpine grassland caused by N limitation on the Tibetan Plateau (TP). To determine such limitation and quantify the N-induced N retention in plant, a six-year fertilization experiment with six levels of N addition rates (0, 1, 2, 4, 8 and 16 g N m−2 yr−1) was conducted in the Namco alpine steppe and additional 89 experiments with multi-level N addition were also synthesized worldwide among which 27 sites were on the TP. In general, N addition promoted N retention in plants, and this increasing trend diminished at the critical N rate (Ncr). The maximum N retention capacity (MNRC) of plants at Ncr was strongly correlated with initial aboveground net primary productivity with a slope of 0.02, and the MNRC of grasslands globally ranged from 0.35 to 42.59 g N m−2 yr−1, approximately account for 39% of Ncr. Tibetan alpine grassland had a low average MNRC (2.24 g N m−2 yr−1) with distinct regional characteristic, which was much lower in the western TP (0.80 g N m−2 yr−1) than the eastern TP (4.10 g N m−2 yr−1). Our results inferred 0.33–1.21 Tg N yr−1 (0.22–0.79 g N m−2 yr−1) can be retained and 5.65–20.11 Tg C yr−1 (3.67–13.06 g C m−2 yr−1) can be gained by Tibetan alpine grasslands under current N deposition level. With the aggravation of N deposition, the alpine steppe ecosystem might continuously absorb N and C until N deposition reaches Ncr.https://doi.org/10.1038/s41598-023-27392-y |
| spellingShingle | Jiaoneng Yu Xu-Ri Songbo Qu Fengzi Li Da Wei Almaz Borjigidai Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition Scientific Reports |
| title | Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition |
| title_full | Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition |
| title_fullStr | Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition |
| title_full_unstemmed | Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition |
| title_short | Plant nitrogen retention in alpine grasslands of the Tibetan Plateau under multi-level nitrogen addition |
| title_sort | plant nitrogen retention in alpine grasslands of the tibetan plateau under multi level nitrogen addition |
| url | https://doi.org/10.1038/s41598-023-27392-y |
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