Vertical variations in plant- and microbial-derived carbon components in grassland soils
文献类型：期刊论文
| 作者 | Ma, Tian; Dai, Guohua; Zhu, Shanshan; Chen, Dima; Chen, Litong; Lu, Xiao-Tao; Wang, Xiaobo; Zhu, Juntao; Zhang, Yangjian; He, Jin-Sheng
|
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2020 |
| 卷号 | 446期号:2020-01-02 |
| 关键词 | Deep soils Distribution patterns Preservation mechanisms Soil organic carbon Chinese-Mongolian grasslands |
| 英文摘要 | Aims Owing to different soil environments and organic carbon sources, soil organic carbon (SOC) composition and preservation mechanisms may vary substantially in deep versus surface soils. This study examines vertical variation of various SOC components (including lignin phenols, cutin, suberin and microbial lipids) across the Chinese-Mongolian grasslands. Methods Lignin phenols and hydrolysable lipids were isolated by cupric oxide oxidation and alkaline hydrolysis, respectively. A comprehensive list of environmental variables was compiled to disentangle influencing factors for the variation of various components at four different depths. Results Lignin phenols, suberin and microbial lipids were most abundant in the surface soil (0-10 cm). Ratios of cutin to suberin and microbial lipids to lignin phenols (in the alpine grasslands) were higher in the bottom-most soil. Calcium (Ca) rather than iron (Fe) plays an important role in the preservation of cutin and microbial lipids in the bottom soil with a high Ca:Fe ratio and high pH. The incorporation efficiency of suberin was higher in deeper than surface soils and showed an increasing trend with depth in the alpine (but not temperate) grasslands. Conclusions Compared to surface soils, the incorporation of root-derived carbon into SOC is more efficient in deeper soils due to stronger mineral protection and weaker microbial decomposition. Root-derived carbon is more important for SOC accrual in the alpine than temperate grasslands, especially at depth. These findings reveal differential distribution patterns and preservation mechanisms for SOC components in the surface versus deep soils, providing new information to understand SOC stability at different depths. |
| 源URL | [http://210.75.249.4/handle/363003/60468]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Ma, Tian,Dai, Guohua,Zhu, Shanshan,et al. Vertical variations in plant- and microbial-derived carbon components in grassland soils[J]. PLANT AND SOIL,2020,446(2020-01-02). |
| APA | Ma, Tian.,Dai, Guohua.,Zhu, Shanshan.,Chen, Dima.,Chen, Litong.,...&Feng, Xiaojuan.(2020).Vertical variations in plant- and microbial-derived carbon components in grassland soils.PLANT AND SOIL,446(2020-01-02). |
| MLA | Ma, Tian,et al."Vertical variations in plant- and microbial-derived carbon components in grassland soils".PLANT AND SOIL 446.2020-01-02(2020). |
入库方式： OAI收割
来源：西北高原生物研究所
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。