Different Molecular Characterization of Soil Particulate Fractions under N Deposition in a Subtropical Forest
文献类型：期刊论文
| 作者 | Geng, Jing1,2,3; Cheng, Shulan2; Fang, Huajun1,2,3 ; Pei, Jie2,4; Xu, Meng1; Lu, Mingzhu1,2; Yang, Yan1,2; Cao, Zicheng2; Li, Yuna2
|
| 刊名 | FORESTS
 |
| 出版日期 | 2019-10-01 |
| 卷号 | 10期号:10页码:18 |
| 关键词 | soil organic matter particulate fractionation pyrolysis-GC/MS molecular characterization nitrogen deposition subtropical forest |
| DOI | 10.3390/f10100914 |
| 通讯作者 | Cheng, Shulan(slcheng@ucas.ac.cn) ; Fang, Huajun(fanghj@igsnrr.ac.cn) |
| 英文摘要 | Key Findings: Combining physical fractionation and pyrolysis-gas chromatography/mass spectrometry (py-GC/MS) technique can help better understand the dynamics of soil organic matter (SOM). Background and Objectives: SOM plays a critical role in the global carbon (C) cycle. However, its complexity remains a challenge in characterizing chemical molecular composition within SOM and under nitrogen (N) deposition. Materials and Methods: Three particulate organic matter (POM) fractions within SOM and under N treatments were studied from perspectives of distributions, C contents and chemical signatures in a subtropical forest. N addition experiment was conducted with two inorganic N forms (NH4Cl and NaNO3) applied at three rates of 0, 40, 120 kg N ha(-1) yr(-1). Three particle-size fractions (>250 mu m, 53-250 mu m and <53 mu m) were separated by a wet-sieving method. Py-GC/MS technique was used to differentiate between chemical composition. Results: A progressive proportion transfer of mineral-associated organic matter (MAOM) to fine POM under N treatment was found. Only C content in fine POM was sensitive to N addition. Principal component analyses (PCA) showed that the coarse POM had the largest plant-derived markers (lignins, phenols, long-chain n-alkanes, and n-alkenes). Short-chain n-alkanes and n-alkenes, benzofurans, aromatics and polycyclic aromatic hydrocarbons mainly from black carbon prevailed in the fine POM. N compounds and polysaccharides from microbial products dominated in the MAOM. Factor analysis revealed that the degradation extent of three fractions was largely distinct. The difference in chemical structure among three particulate fractions within SOM was larger than treatments between control and N addition. In terms of N treatment impact, the MAOM fraction had fewer benzofurans compounds and was enriched in polysaccharides, indicating comparatively weaker mineralization and stronger stabilization of these substances. Conclusions: Our findings highlight the importance of chemical structure in SOM pools and help to understand the influence of N deposition on SOM transformation. |
| WOS关键词 | ORGANIC-MATTER CHEMISTRY ; PARTICLE-SIZE FRACTIONS ; NITROGEN DEPOSITION ; ANALYTICAL PYROLYSIS ; GAS-CHROMATOGRAPHY ; ENZYME-ACTIVITY ; BLACK CARBON ; MICROBIAL COMMUNITY ; MASS-SPECTROMETRY ; BRAZILIAN CERRADO |
| 资助项目 | National Natural Science Foundation of China[31770558] ; National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[41907036] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK1003] ; National Key R&D Program of China[2017YFA0604802] ; National Key R&D Program of China[2017YFA0604804] ; National Key R&D Program of China[2016YFC0500603] ; National Key R&D Program of China[2016YFC0503603] ; CAS Strategic Priority Program[XDA200204020] ; CAS Strategic Priority Program[XDA23060401] ; commissioned program of Ji'an city, Jiangxi Provience[JXRC(JA)-2019-CG75] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000498395600091 |
| 出版者 | MDPI |
| 资助机构 | National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key R&D Program of China ; CAS Strategic Priority Program ; commissioned program of Ji'an city, Jiangxi Provience |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/130250]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Cheng, Shulan; Fang, Huajun |
| 作者单位 | 1.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, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Zhongke Jian Inst Ecoenvironm Sci, Jian 343000, Jiangxi, Peoples R China 4.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Geng, Jing,Cheng, Shulan,Fang, Huajun,et al. Different Molecular Characterization of Soil Particulate Fractions under N Deposition in a Subtropical Forest[J]. FORESTS,2019,10(10):18. |
| APA | Geng, Jing.,Cheng, Shulan.,Fang, Huajun.,Pei, Jie.,Xu, Meng.,...&Li, Yuna.(2019).Different Molecular Characterization of Soil Particulate Fractions under N Deposition in a Subtropical Forest.FORESTS,10(10),18. |
| MLA | Geng, Jing,et al."Different Molecular Characterization of Soil Particulate Fractions under N Deposition in a Subtropical Forest".FORESTS 10.10(2019):18. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。