Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau
文献类型：期刊论文
| 作者 | Jiang, Lili; Wang, Shiping ; Pang, Zhe; Wang, Changshun; Meng, Fandong; Lan, Zhichun; Zhou, Xiaoqi; Li, Yaoming; Zhang, Zhenhua; Luo, Caiyun
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| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2020 |
| 关键词 | Soil inorganic N DOC DON Biomass Alpine grassland |
| 英文摘要 | Background and aims Dissolved organic nitrogen (DON) has been increasingly recognized as a crucial component of the terrestrial nitrogen (N) cycle that regulates the ecosystem feedback to climate change. Yet, little information is available about the factors that control soil DON in the alpine ecosystems of the Tibetan Plateau, a region that is extremely sensitive to climate change. Methods Here, we examined the relationship between DON and climate, plant, and soil attributes along a precipitation gradient in five alpine ecosystems (alpine wetland, alpine meadow, alpine shrub, alpine steppe, and alpine desert) across 20 sites that were up to 4000 km apart on the Tibetan Plateau. Results Results showed that soil DON concentration varied significantly across these alpine ecosystems, and had a positive relationship with mean annual precipitation. Belowground biomass, soil moisture, micro biomass carbon (MBC), and soil total phosphorus (TP) explained 84% of the variation in DON concentrations. The percentage of DON in soil total dissolved N (TDN) varied with vegetation type, with the lowest percentage observed in the alpine meadow (52%) and the highest in the alpine desert (77%), indicating the slow turnover of DON into inorganic N in systems with low litter input and microbial activity. Conclusions Precipitation and plant biomass input determine the concentration and turnover of soil DON on the Tibetan Plateau. A warmer and wetter climate that has been predicted for the Tibetan grasslands may lead to a larger and more active DON pool. |
| 源URL | [http://210.75.249.4/handle/363003/60300]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Jiang, Lili,Wang, Shiping,Pang, Zhe,et al. Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau[J]. PLANT AND SOIL,2020. |
| APA | Jiang, Lili.,Wang, Shiping.,Pang, Zhe.,Wang, Changshun.,Meng, Fandong.,...&Wang, Yanfen.(2020).Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau.PLANT AND SOIL. |
| MLA | Jiang, Lili,et al."Abiotic and biotic controls of soil dissolved organic nitrogen along a precipitation gradient on the Tibetan plateau".PLANT AND SOIL (2020). |
入库方式： OAI收割
来源：西北高原生物研究所
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