Root litter diversity and functional identity regulate soil carbon and nitrogen cycling in a typical steppe
文献类型：期刊论文
| 作者 | Man, Jing1; Tang, Bo1; Xing, Wen; Wang, Yang; Zhao, Xuezhen1; Bai, Yongfei1
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| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2020 |
| 卷号 | 141 |
| 关键词 | Root litter diversity Soil C and N cycling Non-additive effect Root chemical traits Functional root traits Functional identity |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2019.107688 |
| 文献子类 | Article |
| 英文摘要 | Root litter decomposition is the dominant source of soil organic carbon (C) and nitrogen (N) in grasslands. Few studies, however, have explored the effect of root litter diversity on soil C and N cycling. This study investigated the effects of species diversity and functional traits of root litter on soil CO2 and N2O release, net ammonification, net nitrification, and net N mineralization based on a 56-day incubation of grassland soils with root litter mixtures containing one, two, or four native plant species. The increasing species richness of root litter decreased the cumulative CO2 and N2O release in the soil, but enhanced the net ammonification, nitrate immobilization, and N mineralization. Root litter diversity has a predominant non-additive antagonistic effect on the release of soil CO2 and N2O, and a synergistic effect on the net ammonification, nitrate immobilization, and N mineralization in the soil. The functional identity rather than functional diversity of root traits explains most of the variation in soil C and N cycling. A high C: N ratio and low concentrations of N, P, K, and Di-O-alkyl-C (characteristic of celluloses) were found to be key to the antagonistic effects associated with cumulative release of CO2 from the soil. For net N ammonification and mineralization, the synergistic effect was principally induced by the high levels of carbohydrate-C and N and the low C: N ratios in root litter mixtures. Our study highlights the role and mechanisms of increased root litter diversity in decreasing soil CO2 and N2O release and in increasing the net N mineralization via non-additive antagonistic and synergistic effects of dominant root traits. |
| 学科主题 | Soil Science |
| 出版地 | OXFORD |
| WOS关键词 | MICROBIAL BIOMASS CALIBRATION ; FUMIGATION-EXTRACTION METHOD ; SPECIES RICHNESS ; FINE ROOTS ; DECOMPOSITION DYNAMICS ; NONADDITIVE RESPONSES ; ECOSYSTEM PROCESSES ; PLANT DIVERSITY ; GLOBAL PATTERNS ; INNER-MONGOLIA |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000513986700020 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31630010, 31320103916] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/21900]  |
| 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, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Man, Jing,Tang, Bo,Xing, Wen,et al. Root litter diversity and functional identity regulate soil carbon and nitrogen cycling in a typical steppe[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,141. |
| APA | Man, Jing,Tang, Bo,Xing, Wen,Wang, Yang,Zhao, Xuezhen,&Bai, Yongfei.(2020).Root litter diversity and functional identity regulate soil carbon and nitrogen cycling in a typical steppe.SOIL BIOLOGY & BIOCHEMISTRY,141. |
| MLA | Man, Jing,et al."Root litter diversity and functional identity regulate soil carbon and nitrogen cycling in a typical steppe".SOIL BIOLOGY & BIOCHEMISTRY 141(2020). |
入库方式： OAI收割
来源：植物研究所
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