The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem
文献类型：期刊论文
| 作者 | Zhang, Jinbo1,2,3; Tian, Peng4; Tang, Jialiang5 ; Yuan, Lei1; Ke, Yun5; Cai, Zucong1,6; Zhu, Bo5; Mueller, Christoph7
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2016-06-01 |
| 卷号 | 121期号:6页码:1409-1419 |
| 关键词 | DON hydrologic N export N composition NO3- soil gross N transformations |
| ISSN号 | 2169-8953 |
| 通讯作者 | Cai, Zucong ; Zhu, Bo |
| 英文摘要 | It is important to clarify the quantity and composition of hydrologic N export from terrestrial ecosystem and its primary controlling factors, because it affected N availability, productivity, and C storage in natural ecosystems. The most previous investigations were focused on the effects of N deposition and human disturbance on the composition of hydrologic N export. However, few studies were aware of whether there were significant differences in the concentrations and composition of hydrologic N export from natural ecosystems in different climate zones and what is the primary controlling factor. In the present study, three natural forest ecosystems and one natural grassland ecosystem that were located in different climate zones and with different soil pH range were selected. The concentrations of total dissolved N, dissolved organic nitrogen (DON), NH4+, NO3- in soil solution and stream water, soil properties, and soil gross N transformation rates were measured to answer above questions. Our results showed that NO3- concentrations and the composition pattern of hydrologic N export from natural ecosystems varied greatly in the different climate zones. The NO3- concentrations in stream water varied largely, ranging from 0.1mgNL(-1) to 1.6mgNL(-1), while DON concentration in stream water, ranging from 0.1 to 0.9mgNL(-1), did not differ significantly, and the concentrations of NH4+ were uniformly low (average 0.1mgNL(-1)) in all studied sites. There was a trade-off relationship between the proportions of NO3- and DON to total dissolved N in stream water. In subtropical strongly acidic forests soil site, DON was the dominance in total dissolved N in stream water, while NO3--N became dominance in temperate acidic forests soil site, subtropical alkaline forests soil region, and the alpine meadow sites on the Tibetan Plateau. The proportions of NO3- to total dissolved N in both soil solution and stream water significantly increased with the increasing of the gross autotrophic nitrification rates (p<0.01). Our results indicated that the characteristics of soil N transformations were the most primary factor regulating the composition of hydrologic N losses from ecosystems. The nitrification was the central soil N transformation processes regulating N composition in soil solution and hydrologic N losses. These results provided important information on understanding easily the composition of hydrologic N export from terrestrial ecosystem. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 类目[WOS] | Environmental Sciences ; Geosciences, Multidisciplinary |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Geology |
| 关键词[WOS] | DISSOLVED ORGANIC NITROGEN ; INORGANIC NITROGEN ; ISOTOPIC COMPOSITION ; TEMPERATE FORESTS ; NORTHEASTERN USA ; TROPICAL FOREST ; PLANT NITROGEN ; WATERSHEDS ; RETENTION ; NITRATE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000379965000001 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/17551]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Nanjing Normal Univ, Sch Geog Sci, Nanjing, Jiangsu, Peoples R China 2.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China 3.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing, Jiangsu, Peoples R China 4.Northeast Forestry Univ, Coll Forestry, Harbin, Peoples R China 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China 6.Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Jiangsu, Peoples R China 7.Univ Giessen, Dept Plant Ecol IFZ, Giessen, Germany |
| 推荐引用方式 GB/T 7714 | Zhang, Jinbo,Tian, Peng,Tang, Jialiang,et al. The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2016,121(6):1409-1419. |
| APA | Zhang, Jinbo.,Tian, Peng.,Tang, Jialiang.,Yuan, Lei.,Ke, Yun.,...&Mueller, Christoph.(2016).The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,121(6),1409-1419. |
| MLA | Zhang, Jinbo,et al."The characteristics of soil N transformations regulate the composition of hydrologic N export from terrestrial ecosystem".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 121.6(2016):1409-1419. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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