Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems
文献类型：期刊论文
| 作者 | Chi, Qiao-Dong; Wang, Jing ; Liu, Yu-Qing; Zhao, Jun; Cheng, Yi; Cai, Zu-Cong; Feng, Xiao-Juan; Zhang, Jin-Bo
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| 刊名 | EUROPEAN JOURNAL OF SOIL BIOLOGY
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| 出版日期 | 2021-05-06 |
| 卷号 | 104页码:- |
| 关键词 | Grassland soil Gross N mineralization Gross nitrification Aboveground biomass Abiotic N immobilization 15N labelling technique |
| ISSN号 | 1164-5563 |
| 英文摘要 | Soil nitrogen (N) availability, which is primarily controlled by climate and soil properties, may play a key role in regulating biomass production in natural grasslands. However, how climate, soil properties, and gross N dynamics interact in their regulation of biomass production in natural grassland ecosystems in climate-sensitive biomes remains largely unclear. We quantified gross N transformation rates using the 15N dilution technique and the abundance of bacteria, fungi, ammonia-oxidizing archaea, and bacteria in the topsoil (0-10 cm) and subsoil (30-40 cm) in four natural grassland ecosystems along an altitudinal gradient from the Inner Mongolian (IM) to the Qinghai-Tibet (QT) plateaus. The results showed that gross N mineralization rates were generally greater in the topsoil (1.28-4.79 mg N kg-1 soil d-1) than in the subsoil (0.19-0.93 mg N kg-1 soil d-1) in all four grasslands. Gross nitrification rates were also consistently greater in the topsoil (2.42-6.48 mg N kg- 1 soil d-1) than in the subsoil (<1.43 mg N kg- 1 soil d-1) in all four grasslands. Gross nitrification rates were positively correlated with gross N mineralization rates, suggesting that soil nitrification was probably substrate limited. We present evidence of different interactive effects of climate, soil properties, and gross N dynamics on biomass production between the topsoil and the subsoil. In the topsoil, mean annual precipitation influenced gross N mineralization by altering total microbial activity and, in turn, influencing aboveground biomass. However, mean annual temperature influenced underground biomass through altering gross N mineralization in the subsoil. Climate influences biomass production by directly and indirectly regulating soil gross N mineralization in natural grasslands from the IM to the QT plateaus. The findings of the present study could facilitate better prediction of soil N availability for plants in natural grasslands under projected global climate change scenarios. |
| WOS研究方向 | Ecology ; Soil Science |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45608]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peo 3.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Peoples R China 4.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 6.Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chi, Qiao-Dong,Wang, Jing,Liu, Yu-Qing,et al. Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2021,104:-. |
| APA | Chi, Qiao-Dong.,Wang, Jing.,Liu, Yu-Qing.,Zhao, Jun.,Cheng, Yi.,...&Zhang, Jin-Bo.(2021).Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems.EUROPEAN JOURNAL OF SOIL BIOLOGY,104,-. |
| MLA | Chi, Qiao-Dong,et al."Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems".EUROPEAN JOURNAL OF SOIL BIOLOGY 104(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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