Exogenous N addition enhances the responses of gross primary productivity to individual precipitation events in a temperate grassland
文献类型：SCI/SSCI论文
| 作者 | Guo Q.; Hu, Z. M.; Li, S. G.; Yu, G. R.; Sun, X. M.; Li, L. H.; Liang, N. S.; Bai, W. M. |
| 发表日期 | 2016 |
| 关键词 | rain-use efficiency nitrogen addition inner-mongolia soil respiration plant-responses ecosystem water pulses climate carbon |
| 英文摘要 | Predicted future shifts in the magnitude and frequency (larger but fewer) of precipitation events and enhanced nitrogen (N) deposition may interact to affect grassland productivity, but the effects of N enrichment on the productivity response to individual precipitation events remain unclear. In this study, we quantified the effects of N addition on the response patterns of gross primary productivity (GPP) to individual precipitation events of different sizes (P-size) in a temperate grassland in China. The results showed that N enrichment significantly increased the time-integrated amount of GPP in response to an individual precipitation event (GPP(total)), and the N-induced stimulation of GPP increased with increasing Psize. N enrichment rarely affected the duration of the GPP response, but it significantly stimulated the maximum absolute GPP response. Higher foliar N content might play an important role in the N-induced stimulation of GPP. GPPtotal in both the N-addition and control treatments increased linearly with Psize with similar Psize intercepts (approximately 5 mm, indicating a similar lower Psize threshold to stimulate the GPP response) but had a steeper slope under N addition. Our work indicates that the projected larger precipitation events will stimulate grassland productivity, and this stimulation might be amplified by increasing N deposition. |
| 出处 | Scientific Reports |
| 卷 | 6 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43235]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Guo Q.,Hu, Z. M.,Li, S. G.,et al. Exogenous N addition enhances the responses of gross primary productivity to individual precipitation events in a temperate grassland. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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