Gross N transformations were little affected by 4 years of simulated N and S depositions in an aspen-white spruce dominated boreal forest in Alberta, Canada
文献类型：期刊论文
| 作者 | Cheng, Yi1,2; Cai, Zu-cong1; Zhang, Jin-bo1; Chang, Scott X.2 |
| 刊名 | FOREST ECOLOGY AND MANAGEMENT
 |
| 出版日期 | 2011-08-01 |
| 卷号 | 262期号:3页码:571-578 |
| 关键词 | (15)N pool dilution Gross N mineralization rates Gross NH(4)(+) immobilization rates Gross nitrification rates Boreal forest soil Global change |
| ISSN号 | 0378-1127 |
| DOI | 10.1016/j.foreco.2011.04.027 |
| 通讯作者 | Cai, Zu-cong(zccai@issas.ac.cn) |
| 英文摘要 | The effects of 4 years of simulated nitrogen (N) and sulfur (S) depositions on gross N transformations in a boreal forest soil in the Athabasca oil sands region (AOSR) in Alberta, Canada, were investigated using the (15)N pool dilution method. Gross NH(4)(+) transformation rates in the organic layer tended to decline (P < 0.10, marginal statistical significance, same below) in the order of control (CK, i.e., no N or S addition), +N (30 kg N ha(-1) yr(-1)) +S (30 kg S ha(-1) yr(-1)), and +NS treatments, with an opposite trend in the mineral soil. Gross NH(4)(+) immobilization rates were generally higher than gross N mineralization rates across the treatments, suggesting that the studied soil still had potential for microbial immobilization of NH(4)(+), even after 4 years of elevated levels of simulated N and S depositions. For both soil layers, N addition tended to increase (P < 0.10) the gross nitrification and NO(3)(-) immobilization rates. In contrast, S addition reduced (P < 0.001) and increased (P < 0.001) gross nitrification as well as tended (P < 0.10) to reduce and increase gross NO(3)(-) immobilization rates in the organic and mineral soils, respectively. Gross nitrification and gross NO(3)(-) immobilization rates were tightly coupled in both soil layers. The combination of rapid NH(4)(+) cycling, negligible net nitrification rates and the small NO(3)(-) pool size after 4 years of elevated N and S depositions observed here suggest that the risk of NO(3)(-) leaching would be low in the studied boreal forest soil, consistent with N leaching measurements in other concurrent studies at the site that are reported elsewhere. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | OIL SANDS REGION ; SOIL-NITROGEN TRANSFORMATIONS ; NORTHERN HARDWOOD FORESTS ; TEMPERATE FOREST ; ABIOTIC IMMOBILIZATION ; POOL DILUTION ; NITRATE ; MINERALIZATION ; SATURATION ; NITRIFICATION |
| WOS研究方向 | Forestry |
| WOS类目 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000292428500030 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558977 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Cai, Zu-cong |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada |
| 推荐引用方式 GB/T 7714 | Cheng, Yi,Cai, Zu-cong,Zhang, Jin-bo,et al. Gross N transformations were little affected by 4 years of simulated N and S depositions in an aspen-white spruce dominated boreal forest in Alberta, Canada[J]. FOREST ECOLOGY AND MANAGEMENT,2011,262(3):571-578. |
| APA | Cheng, Yi,Cai, Zu-cong,Zhang, Jin-bo,&Chang, Scott X..(2011).Gross N transformations were little affected by 4 years of simulated N and S depositions in an aspen-white spruce dominated boreal forest in Alberta, Canada.FOREST ECOLOGY AND MANAGEMENT,262(3),571-578. |
| MLA | Cheng, Yi,et al."Gross N transformations were little affected by 4 years of simulated N and S depositions in an aspen-white spruce dominated boreal forest in Alberta, Canada".FOREST ECOLOGY AND MANAGEMENT 262.3(2011):571-578. |
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来源：南京土壤研究所
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