Different composition and distribution patterns of mineral-protected versus hydrolyzable lipids in shrubland soils
文献类型：期刊论文
| 作者 | Cai, Yue1; Tang, Zhiyao3; Xiong, Gaoming; Xie, Zongqiang1 ; Liu, Zongguang; Feng, Xiaojuan1
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2017 |
| 卷号 | 122期号:9页码:2206-2218 |
| 关键词 | physical protection cutin and suberin microbial carbon environmental influences accumulation mechanism |
| ISSN号 | 2169-8953 |
| DOI | 10.1016/j.scitotenv.2017.06.057 |
| 文献子类 | Article |
| 英文摘要 | Mineral protection is known as an important mechanism stabilizing soil organic carbon (SOC). However, the composition, sources, and variations of mineral-protected SOC remain poorly constrained. To fill this knowledge gap, we used hydrofluoric acid to demineralize soil matrix and compared the sources and distribution of mineral-protected lipids (ML) versus hydrolyzable lipids (HL) of four typical Chinese shrubland soils. ML was found to represent a sizable fraction (9-32%) of total aliphatic lipids (including n-alkanols; n-alkanoic acids; ,-alkanedioic acids; hydroxyalkanoic acids; and midchain-substituted acids) in all soils. Based on carbon chain length and branch positions, microbe- and plant-derived lipids were distinguished. No significant difference was found in the ratio of microbe- to plant-derived lipids in ML versus HL, implying that plant and microbial inputs are equally important for the mineral-associated soil lipids. However, ML contained a higher proportion of nonspecific lipids, especially at depths. Furthermore, to evaluate key environmental variable(s) controlling the distribution of different lipid components, a multiple stepwise regression analysis was conducted. Notably, ML was mainly affected by SOC-to-nitrogen ratio instead of mineralogical properties, implying that the accrual of mineral-associated soil lipids relies strongly on organic matter properties. Collectively, our findings provide novel insights on sources and accumulation mechanisms of mineral-protected soil lipids. SOC decomposition and subsequent accretion of degradation products appear to be vital for the sequestration of mineral-associated soil lipids and warrant better recognition in the investigations of stable soil carbon accumulation mechanisms. |
| 学科主题 | Environmental Sciences & Ecology |
| 出版地 | WASHINGTON |
| 电子版国际标准刊号 | 2169-8961 |
| WOS关键词 | ORGANIC-MATTER ; FOREST SOIL ; CARBON STORAGE ; MICROBIAL COMMUNITIES ; LITTER DECOMPOSITION ; AGRICULTURAL SOIL ; ALIPHATIC LIPIDS ; SIZE FRACTIONS ; DYNAMICS ; PLANT |
| 语种 | 英语 |
| WOS记录号 | WOS:000408755300136 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41422304, 31370491] ; National Thousand Young Talents recruiting plan of China |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/22083]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Yue,Tang, Zhiyao,Xiong, Gaoming,et al. Different composition and distribution patterns of mineral-protected versus hydrolyzable lipids in shrubland soils[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(9):2206-2218. |
| APA | Cai, Yue,Tang, Zhiyao,Xiong, Gaoming,Xie, Zongqiang,Liu, Zongguang,&Feng, Xiaojuan.(2017).Different composition and distribution patterns of mineral-protected versus hydrolyzable lipids in shrubland soils.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,122(9),2206-2218. |
| MLA | Cai, Yue,et al."Different composition and distribution patterns of mineral-protected versus hydrolyzable lipids in shrubland soils".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 122.9(2017):2206-2218. |
入库方式： OAI收割
来源：植物研究所
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