Root derived carbon transport extends the rhizosphere of rice compared to wheat
文献类型：期刊论文
| 作者 | Wang, Xiaoting; Chen, Ruirui; Jing, Zhongwang ; Yao, Tongyan; Feng, Youzhi; Lin, Xiangui
|
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 122页码:211-219 |
| 关键词 | Paddy soil Upland soil C-13 Rhizodeposits Bacterial community |
| ISSN号 | 0038-0717 |
| 文献子类 | Article |
| 英文摘要 | Upland and paddy soils are two main agricultural land-use types. Differences in the transportation and distribution of root-derived C between these two soil types are of great significance, but given less attention. In the current study, a pot experiment with rhizobox (one root zone and four outer zones) was conducted in a continuous C-13-CO2 labelling chamber, cultivating rice (paddy soil) and wheat (upland soil), respectively. C-13 abundances of soil organic carbon (SOC), dissolved organic carbon (DOC), microbial biomass carbon (MBC) and bacterial community composition were measured after labelling. The C-13 atom% of SOC, DOC and MBC was lower in the root zone but higher in non-rhizosphere paddy soil, when compared with the upland soil. Similar amounts of C-13 were recovered in these two soils. In the upland soil, 83.5% of total C-13 was retained in the rhizosphere, while 71.4% in the paddy soil was transported to outer zones. Furthermore, there was a sharp decrease of root-derived C and concomitantly an abrupt succession of bacterial community between the root compartment and outer zones in the upland soil, indicating a narrow extension of wheat rhizosphere. In contrast, more gradual variations in carbon distribution and bacterial community composition were seen in the paddy soil, with a clear evidence of a transition zone. In conclusion, compared with the upland soil, more root-derived carbon is transported from rhizosphere to bulk soil in paddies, which leads to a wider range of rhizosphere and a higher rhizosphere effect. These results are helpful to understand the widely accepted distinctions in soil C stock and productivity sustainability between upland and paddy soils. It may shed light on a new perspective for improving soil fertility, especially in upland cropping systems. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40654]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Xiaoting,Chen, Ruirui,Jing, Zhongwang,et al. Root derived carbon transport extends the rhizosphere of rice compared to wheat[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,122:211-219. |
| APA | Wang, Xiaoting,Chen, Ruirui,Jing, Zhongwang,Yao, Tongyan,Feng, Youzhi,&Lin, Xiangui.(2018).Root derived carbon transport extends the rhizosphere of rice compared to wheat.SOIL BIOLOGY & BIOCHEMISTRY,122,211-219. |
| MLA | Wang, Xiaoting,et al."Root derived carbon transport extends the rhizosphere of rice compared to wheat".SOIL BIOLOGY & BIOCHEMISTRY 122(2018):211-219. |
入库方式： OAI收割
来源：生态环境研究中心
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