Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches
文献类型：SCI/SSCI论文
| 作者 | Quan Q.; He, N. P.; Zhang, Z.; Zhang, Y. H.; Gao, Y. |
| 发表日期 | 2015 |
| 关键词 | Degradation Grazing Nitrogen deposition Restoration Species richness inner mongolian steppe semiarid grassland leymus-chinensis california grassland ecosystem responses species-diversity plant-communities seed dispersal northern china use-efficiency |
| 英文摘要 | A rapid increase in grazing intensity since the 1980s has caused large areas of the Inner Mongolian grasslands to become degraded. Increasing atmospheric nitrogen (N) deposition might exert an important influence on vegetation restoration in these degraded grasslands by increasing available N and relieving N limitations on productivity. However, no previous studies have tested the assumption that increasing N deposition promotes vegetation restoration in degraded grasslands. By conducting a 4-year field restoration experiment with four N addition treatments (0, 5, 10, and 20 g Nm (2) year (1)) and two grazing treatments (grazed and ungrazed), we investigated the effects of N enrichment and grazing on the restoration of patches in which vegetation had been degraded. N addition significantly accelerated the restoration of vegetation-degraded grassland patches regarding both plant cover and diversity. Moderate grazing also promoted the restoration of degraded-vegetation patches in term of both plant diversity and species similarity. Importantly, the positive effects of N addition on the restoration of degraded patches may be augmented by grazing. This study demonstrate that low levels of N enrichment (or increasing atmospheric N deposition) positively impact vegetation restoration in degraded grassland patches, particularly under moderate grazing practices. Our findings provide new insights into the management of severely degraded grasslands through the regulation of N inputs and grazing practices. (C) 2014 Elsevier B.V. All rights reserved. |
| 出处 | Ecological Engineering |
| 卷 | 75 |
| 页 | 172-177 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0925-8574 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38822]  |
| 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 | Quan Q.,He, N. P.,Zhang, Z.,et al. Nitrogen enrichment and grazing accelerate vegetation restoration in degraded grassland patches. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。