Nitrogen functional gene activity in soil profiles under progressive vegetative recovery after abandonment of agriculture at the Puding Karst Critical Zone Observatory, SW China
文献类型：期刊论文
| 作者 | Li, Dandan3; Zhang, Xinyu3,4; Green, Sophie M.1; Dungait, Jennifer A. J.1,2; Wen, Xuefa3,4; Tang, Yuqian3,4; Guo, Zhiming3,4; Yang, Yang3,4; Sun, Xiaomin3,4; Quine, Timothy A.1 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 125页码:93-102 |
| 关键词 | Nitrogen functional genes Soil profile Vegetation recovery Karst ecosystems Nitrate Phosphorus |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2018.07.004 |
| 通讯作者 | Zhang, Xinyu(zhangxy@igsnrr.ac.cn) |
| 英文摘要 | At the end of the 20th century, China launched the 'Grain-for-Green' Project (GGP) that recommended the abandonment of low-yielding sloping farmland (> 15 degrees) prone to soil degradation by erosion, to allow recovery through natural vegetative regeneration. The effect of this policy on soil nitrogen (N) cycling, as fertilization applications are also withdrawn after abandonment, is poorly understood. A space-for-time approach was applied to investigate the responses of nitrogen functional genes (NFGs) in soil profiles (surface to bedrock) associated with progressive vegetative recovery (sloping farmland > recently abandoned sloping farmland > secondary forest > primary forest) at the Puding Karst Critical Zone Observatory in Guizhou province, southwest China. Coincident soil chemical properties (dissolved organic carbon (DOC), nitrate (NO3-N), ammonium (NH4+-N), available inorganic phosphorus (AP), soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP)) were also quantified. We found that the absolute abundance of NFGs significantly varied according to the phase of vegetation recovery, and that concentrations of AP and NO3%N were the best explanatory variables. The external N from fertilizer application promoted the absolute abundances of ammonia oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in sloping farmland. The relative abundances of chiA (associated with decomposition) increased with soil depth across all vegetation recovery phases. The relative abundances of chiA and nifH (associated with N fixation) accounted for the largest proportion (58-72%) of the measured NFGs, indicating that active N-acquisition increased along the vegetation recovery gradient. The ratios of (chiA + nifH)/(AOA + AOB) and the sums of (nirK + nirS) were larger in the forest soil than those of sloping farmland and abandoned sloping farmland, implying a greater capacity for N storage potential, though accompanied by increased gas N emission potential, in the karst forest ecosystems. Our results provide a new and comprehensive understanding of soil N cycling potentials at the microscale in degraded and recovering karst ecosystems. |
| WOS关键词 | ORGANIC-CARBON ; COMMUNITY STRUCTURE ; SOUTHWEST CHINA ; DENITRIFYING BACTERIA ; MICROBIAL COMMUNITIES ; FOREST ECOSYSTEMS ; AMMONIA OXIDIZERS ; LAND-USE ; ABUNDANCE ; DENITRIFICATION |
| 资助项目 | State Key and General Programs of National Natural Science Foundation of China[41571130043] ; State Key and General Programs of National Natural Science Foundation of China[41571251] ; National Environmental Research Council of the UK[NE/N007603/1] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000444660400010 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | State Key and General Programs of National Natural Science Foundation of China ; National Environmental Research Council of the UK |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/52903]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Xinyu |
| 作者单位 | 1.Univ Exeter, Coll Life & Environm Sci, Geog, Rennes Dr, Exeter EX4 4RJ, Devon, England 2.Rothamsted Res, Sustainable Agr Syst Dept, Okehampton EX20 2SB, Devon, England 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Dandan,Zhang, Xinyu,Green, Sophie M.,et al. Nitrogen functional gene activity in soil profiles under progressive vegetative recovery after abandonment of agriculture at the Puding Karst Critical Zone Observatory, SW China[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,125:93-102. |
| APA | Li, Dandan.,Zhang, Xinyu.,Green, Sophie M..,Dungait, Jennifer A. J..,Wen, Xuefa.,...&Quine, Timothy A..(2018).Nitrogen functional gene activity in soil profiles under progressive vegetative recovery after abandonment of agriculture at the Puding Karst Critical Zone Observatory, SW China.SOIL BIOLOGY & BIOCHEMISTRY,125,93-102. |
| MLA | Li, Dandan,et al."Nitrogen functional gene activity in soil profiles under progressive vegetative recovery after abandonment of agriculture at the Puding Karst Critical Zone Observatory, SW China".SOIL BIOLOGY & BIOCHEMISTRY 125(2018):93-102. |
入库方式： OAI收割
来源：地理科学与资源研究所
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