Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?
文献类型：期刊论文
| 作者 | Gao, Wenlong1,2; Kou, Liang1,2; Yang, Hao1; Zhang, Jinbo3; Mueller, Christoph4,5,6; Li, Shenggong1 |
| 刊名 | Soil biology & biochemistry
 |
| 出版日期 | 2016-09-01 |
| 卷号 | 100页码:102-109 |
| 关键词 | N deposition Gross n transformations Dnra N-15 tracing model Acid soil of subtropical forest |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2016.06.002 |
| 通讯作者 | Li, shenggong(lisg@igsnrr.ac.cn) |
| 英文摘要 | Changes in soil n-cycling and retention processes in subtropical/tropical acidic forest ecosystems under anthropogenic n inputs are not well understood. we conducted a laboratory n-15 tracing study on an acid soil (ph values: 4.6 to 5.0) from a subtropical forest fertilized for more than 2.5 years at a rate of 0, 40, and 120 kg nh4cl-n ha(-1) yr(-1), respectively. to get a better resolution of mechanistic changes in soil n cycling and retention processes under nhs additions, we used a conceptual n-15 tracing model to quantify process-specific and pool-specific n transformation rates in soils. gross n mineralization rates decreased at high nh4+ additions, which were paralleled by a reduction in fungal biomass and mineralization of recalcitrant organic n. gross nhs immobilization rates did not show a change with increasing nh4+ additions. interestingly, soil no3- production (heterotrophic, autotrophic, and gross nitrification) and retention (no3- immobilization and dissimilatory nitrate reduction to ammonium) showed insensitivity to increasing additions of nh4+. the mechanisms behind the lack of response of heterotrophic nitrification were unclear, but possibly related to the absence of significant changes in soil c:n ratio and soil acidity under increased nh4+ additions. because of the low autotrophic nitrification potential and the lack of nh4+ limitation to autotrophic nitrifiers, autotrophic nitrification was unresponsive to nh4+ additions. no3- immobilization rates appeared to be controlled by the no3- produced from heterotrophic nitrification, as indicated by the positive relationship between no3- immobilization and heterotrophic nitrification (r-2 = 0.59, p = 0.015), thus showing a lack of a change under increased nh4+ additions. dnra seemed to be inherently less responsive to environmental changes such as nh4+ deposition. our work demonstrates that enhanced nh4+ deposition has a low potential to stimulate soil no3- production and weaken soil retention of no3- in this, and perhaps other subtropical/tropical acidic forest ecosystems. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | CHILEAN NOTHOFAGUS FOREST ; NITROGEN DEPOSITION ; HETEROTROPHIC NITRIFICATION ; TROPICAL FOREST ; TERRESTRIAL ECOSYSTEMS ; OXIDE EMISSIONS ; PINE PLANTATION ; ROOT DECAY ; N-15 ; CHINA |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000380600100012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2375115 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Shenggong |
| 作者单位 | 1.Chinese Acad Sci, Univ Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210047, Jiangsu, Peoples R China 4.Univ Giessen, Dept Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany 5.Univ Coll Dublin, Sch Biol & Environm Sci, Belfield, Ireland 6.Univ Coll Dublin, Earth Inst, Belfield, Ireland |
| 推荐引用方式 GB/T 7714 | Gao, Wenlong,Kou, Liang,Yang, Hao,et al. Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?[J]. Soil biology & biochemistry,2016,100:102-109. |
| APA | Gao, Wenlong,Kou, Liang,Yang, Hao,Zhang, Jinbo,Mueller, Christoph,&Li, Shenggong.(2016).Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?.Soil biology & biochemistry,100,102-109. |
| MLA | Gao, Wenlong,et al."Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?".Soil biology & biochemistry 100(2016):102-109. |
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来源：中国科学院大学
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