Inorganic and Organic Nitrogen Acquisition by a Fern Dicranopteris dichotoma in a Subtropical Forest in South China
文献类型：SCI/SSCI论文
| 作者 | Xu X. L. ; Li Q. K. ; Wang J. Y. ; Zhang L. M. ; Tian S. N. ; Zhi L. ; Li Q. R. ; Sun Y. |
| 发表日期 | 2014 |
| 关键词 | amino-acid-transport n uptake rain-forest mauna-loa plants soil roots nutrition linearis availability |
| 英文摘要 | The fern Dicranopteris dichotoma is an important pioneer species of the understory in Masson pine (Pinus massoniana) forests growing on acidic soils in the subtropical and tropical China. To improve our understanding of the role of D. dichotoma in nitrogen (N) uptake of these forests, a short-term N-15 experiment was conducted at mountain ridge (MR, with low N level) and mountain foot (MF, with high N level). We injected N-15 tracers as 15 NH4, (NO3)-N-15 or N-15-glycine into the soil surrounding each plant at both MR and MF sites. Three hours after tracer injection, the fern D. dichotoma took up (NH4+)-N-15 significantly faster at MF than at MR, but it showed significantly slower uptake of (NO3-)-N-15 at MF than at MR. Consequently, (NO3-)-N-15 made greater contribution to the total N uptake (50% to the total N uptake) at MR than at MF, but N-15-glycine only contributed around 11% at both sites. Twenty-four hours after tracer injection, D. dichotoma preferred (NH4+)-N-15 (63%) at MR, whereas it preferred (NO3-)-N-15 (47%) at MF. We concluded that the D. dichotoma responds distinctly in its uptake pattern for three available N species over temporal and spatial scales, but mainly relies on inorganic N species in the subtropical forest. This suggests that the fern employs different strategies to acquire available N which depends on N levels and time. |
| 出处 | Plos One |
| 卷 | 9 |
| 期 | 5 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1932-6203 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29483]  |
| 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 | Xu X. L.,Li Q. K.,Wang J. Y.,et al. Inorganic and Organic Nitrogen Acquisition by a Fern Dicranopteris dichotoma in a Subtropical Forest in South China. 2014. |
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。