Ammonium fertilization causes a decoupling of ammonium cycling in a boreal forest
文献类型：期刊论文
| 作者 | Gao, Wenlong1,2; Kou, Liang1,2; Zhang, Jinbo3; Mueller, Christoph4,5,6,7; Yang, Hao1; Li, Shenggong1 |
| 刊名 | Soil biology & biochemistry
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 101页码:114-123 |
| 关键词 | Ammonium deposition Net and gross n transformations N-15 tracing model Aoa Boreal coniferous forest |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2016.07.007 |
| 通讯作者 | Li, shenggong(lisg@igsnrr.ac.cn) |
| 英文摘要 | The forest-floor organic layer of the boreal coniferous forest is generally characterized by large mineral-n pools (especially ammonium), high rates of gross n mineralization, and low rates of autotrophic nitrification and nitrate immobilization. as atmospheric n deposition increases in boreal regions, it is expected to increase n losses from the forest-floor organic layer, which could affect the n status and microbial n cycling of the underlying mineral soil. to test this possibility, we conducted a long-term experiment, starting in 2010, consisting of three n addition levels (0, 20, and 40 kg nh4cl-n ha(-1) yr(-1)) in a boreal larix gmelinii forest in the great xing'an mountain, china. we measured mineral n concentrations (2012-2014), the in-situ net n-cycling rates (2012 and 2013), the gross n transformation rates (2014), and microbial abundance (2014) in mineral soil (0-10 cm) in the peak growing season. the gross rates of n transformations were quantified via a laboratory, n-15 tracing experiment with a process based n-15 tracing model. not concentration, in-situ net nitrification, heterotrophic nitrification, gross nitrification, not immobilization, and dissimilatory no3- reduction to nh4+ (dnra) neither increased nor decreased, suggesting that not loss, production and retention were not affected by continual nh4+ additions. however, the nh4+ concentration and in-situ net ammonification rates increased under continued high nh4+ additions, reflecting a change in soil nh4+ status. as a result, microbial nh4+ cycling was in uncoupled state in the high n addition plots (nh4+ immobilization rates were incomparable to gross n mineralization rates), but this was not the case for the control and low n addition plots. interestingly, the nh4+ oxidation rates decreased rather than increased with decreased nh4+ immobilization rates in the high n addition plots. however, the decreased nh4+ oxidation rates were paralleled by a reduction in ammonia-oxidizing archaea (aoa) abundance. our results indicate that for this boreal coniferous forest, enhanced nh4+ deposition could alter mineral soil nh4+ status and nh4+ consumption. we show that nh4+ fertilization could inhibit nh4+ oxidation in forest soils. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | SOIL-NITROGEN TRANSFORMATIONS ; CHILEAN NOTHOFAGUS FOREST ; OXIDIZING ARCHAEA ; HETEROTROPHIC NITRIFICATION ; COMMUNITY STRUCTURE ; GRASSLAND SOIL ; DEPOSITION ; ECOSYSTEMS ; BACTERIA ; SATURATION |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000383300200012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376296 |
| 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 IFZ, Heinrich Buff Ring 26, D-35392 Giessen, Germany 5.Univ Coll Dublin, Sch Biol, Belfield, Ireland 6.Univ Coll Dublin, Sch Environm Sci, Belfield, Ireland 7.Univ Coll Dublin, Earth Inst, Belfield, Ireland |
| 推荐引用方式 GB/T 7714 | Gao, Wenlong,Kou, Liang,Zhang, Jinbo,et al. Ammonium fertilization causes a decoupling of ammonium cycling in a boreal forest[J]. Soil biology & biochemistry,2016,101:114-123. |
| APA | Gao, Wenlong,Kou, Liang,Zhang, Jinbo,Mueller, Christoph,Yang, Hao,&Li, Shenggong.(2016).Ammonium fertilization causes a decoupling of ammonium cycling in a boreal forest.Soil biology & biochemistry,101,114-123. |
| MLA | Gao, Wenlong,et al."Ammonium fertilization causes a decoupling of ammonium cycling in a boreal forest".Soil biology & biochemistry 101(2016):114-123. |
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来源：中国科学院大学
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