Increased contribution of root exudates to soil carbon input during grassland degradation
文献类型：期刊论文
| 作者 | Shen, Xing; Yang, Fan1; Xiao, Chunwang; Zhou, Yong2 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2020 |
| 卷号 | 146 |
| 关键词 | Root exudates Root turnover Litter materials Soil carbon input Grassland degradation Species composition |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2020.107817 |
| 文献子类 | Article |
| 英文摘要 | The contribution of root exudates to soil carbon (C) inputs is poorly quantified, especially for grasslands under the context of degradation that includes simultaneous shifts in species composition due to long-term overgrazing. The objectives of this study were to examine (1) how grassland degradation affects root exudation rate and (2) to what extent root exudates contribute to soil C inputs compared to litter materials and root turnover during degradation. A field experiment was conducted in a temperate grassland, with different levels of degradation (undegraded control, moderately degraded, and severely degraded), dominated by different species in Inner Mongolia. Aboveground biomass, root biomass, and root exudate rate were measured monthly during a growing season. Root exudation rates differed among dominant plant species across the degradation gradients and grassland degradation significantly increased root exudation rates at the plot level. However, the amount of root exudates released to soils in degraded sites was lower than in undegraded site due to reduced living root biomass. Compared to the undegraded control, the relative contribution of root exudates to soil C inputs was enhanced by grassland degradation as a result of decreased contributions from root turnover. These findings prove grassland degradation can alter the relative contribution of root exudates compared to other soil C inputs and highlight the necessity of further studies to examine how this shift may affect soil organic C formation and long-term storage. |
| 学科主题 | Soil Science |
| 出版地 | OXFORD |
| WOS关键词 | FINE-ROOT ; GRAZING INTENSITY ; ORGANIC-CARBON ; PLANT-GROWTH ; RHIZOSPHERE ; DYNAMICS ; BIOMASS ; MANAGEMENT ; NITROGEN ; FOREST |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000536199300006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31770501] ; National Key Research and Development Program of China [2016YFC0500501] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/21746]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Minzu Univ China, Coll Life & Environm Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 3.Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT 06520 USA |
| 推荐引用方式 GB/T 7714 | Shen, Xing,Yang, Fan,Xiao, Chunwang,et al. Increased contribution of root exudates to soil carbon input during grassland degradation[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,146. |
| APA | Shen, Xing,Yang, Fan,Xiao, Chunwang,&Zhou, Yong.(2020).Increased contribution of root exudates to soil carbon input during grassland degradation.SOIL BIOLOGY & BIOCHEMISTRY,146. |
| MLA | Shen, Xing,et al."Increased contribution of root exudates to soil carbon input during grassland degradation".SOIL BIOLOGY & BIOCHEMISTRY 146(2020). |
入库方式： OAI收割
来源：植物研究所
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