Effects of long-term nitrogen deposition on fine root decomposition and its extracellular enzyme activities in temperate forests
文献类型：期刊论文
| 作者 | Lu, Xiaotao1; Sun, Tao1,2; Dong, Lili2; Wang, Zhengwen1; Mao, Zijun2 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 93页码:50-59 |
| 关键词 | Decomposition Fine Roots Litter Quality Microbial Enzymes Nitrogen Temperate Forests |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2015.10.023 |
| 英文摘要 | Resolving the effects of nitrogen (N) on decomposition is ecologically critical for predicting the ecosystem consequences of increased anthropogenic N deposition. Although root litter is the dominant soil carbon (C) and nutrient input in many forest ecosystems, studies have rarely examined how the process of root decomposition is affected by N availability. In a field experiment, we studied the effects of N addition on fine root (<0.5 mm diameter) decomposition using five substrates ranging in initial gravimetric lignin concentrations (from 10.8% to 34.1%) over five years, and made a simultaneous characterization of effects of N on the enzymatic activity of the decomposer community in three temperate forests. Across substrates, asymptotic decomposition models best described the decomposition. The effects of N addition shifted over the course of fine root decomposition, regardless of initial lignin concentrations, with N speeding up the initial rate of decomposition, but ultimately resulting in a larger, slowly decomposing litter fraction (A). Such contrasting effects of N addition on initial and later stages of decomposition were closely linked to the dynamics of its extracellular enzyme activity. Our results emphasized the need for studies of N effects on litter decomposition that encompass the later stages of decomposition. This study suggested that atmospheric N addition may have contrasting effects on the dynamics of different carbon pools in forest soils, and such contrasting effects of N should be widely considered in biogeochemical models. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000369207200006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://210.72.129.5/handle/321005/122447]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Mao, Zijun |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China 2.Northeast Forestry Univ, Minist Educ, Key Lab Forest Plant Ecol, Harbin 150040, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Xiaotao,Sun, Tao,Dong, Lili,et al. Effects of long-term nitrogen deposition on fine root decomposition and its extracellular enzyme activities in temperate forests[J]. SOIL BIOLOGY & BIOCHEMISTRY,2016,93:50-59. |
| APA | Lu, Xiaotao,Sun, Tao,Dong, Lili,Wang, Zhengwen,&Mao, Zijun.(2016).Effects of long-term nitrogen deposition on fine root decomposition and its extracellular enzyme activities in temperate forests.SOIL BIOLOGY & BIOCHEMISTRY,93,50-59. |
| MLA | Lu, Xiaotao,et al."Effects of long-term nitrogen deposition on fine root decomposition and its extracellular enzyme activities in temperate forests".SOIL BIOLOGY & BIOCHEMISTRY 93(2016):50-59. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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