Changes in above and belowground traits of a rhizome clonal plant explain its predominance under nitrogen addition
文献类型：期刊论文
| 作者 | Zheng, Zhi ; Ma, Pengfei
|
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2018 |
| 卷号 | 432 |
| 关键词 | Nitrogen addition Leymus chinensis Plant traits Inner mongolian steppe |
| 英文摘要 | Background and aimsDespite extensive studies documenting that changes in plant community structure in response to enhanced atmospheric nitrogen (N) deposition were driven by positive effects of N enrichment on rhizome clonal plants in grassland communities, few studies have specifically investigated the responses of rhizome clonal plants to N enrichment in terms of above-and below-ground plant traits.MethodsBy monitoring above-ground and below-ground plant traits, we investigated long-term (13-year) effects of N addition (64gm(-2)yr.(-1)) on Leymus chinensis, a rhizome clonal plant, in temperate steppes of northern China.ResultsNitrogen addition enhanced the relative above-ground biomass of L. chinensis from 0.6% (2004) to 75% (2016) in steppe communities. Nitrogen addition enhanced leaf N and chlorophyll concentrations, and specific leaf area, thus leading to a marked increase in photosynthetic rates. Nitrogen addition altered the patterns of carbon allocation, by enhancing the ratios of below-ground to above-ground biomass, while N addition reduced the ratios of rhizome to root biomass. Nitrogen addition modified morphological traits of absorptive fine roots (first two-order roots) by enhancing specific root length and reducing root tissue density and average root diameter. Nitrogen addition significantly shortened rhizome internodes and increased bud density of L. chinensis.ConclusionNitrogen addition enhanced L. chinensis resource-acquiring and vegetative reproduction capability, thereby leading to its predominance in the steppe communities. |
| 源URL | [http://210.75.249.4/handle/363003/59946]  |
| 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 | Zheng, Zhi,Ma, Pengfei. Changes in above and belowground traits of a rhizome clonal plant explain its predominance under nitrogen addition[J]. PLANT AND SOIL,2018,432. |
| APA | Zheng, Zhi,&Ma, Pengfei.(2018).Changes in above and belowground traits of a rhizome clonal plant explain its predominance under nitrogen addition.PLANT AND SOIL,432. |
| MLA | Zheng, Zhi,et al."Changes in above and belowground traits of a rhizome clonal plant explain its predominance under nitrogen addition".PLANT AND SOIL 432(2018). |
入库方式： OAI收割
来源：西北高原生物研究所
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