Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China
文献类型：期刊论文
| 作者 | Ding, Wenli1; Xu, Weizhou2; Gao, Zhijuan1; Xu, Bingcheng1,3 |
| 刊名 | JOURNAL OF ARID LAND
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 13期号:7页码:730-743 |
| 关键词 | aggressivity nitrogen deposition relative competitive ability root trait water stress |
| ISSN号 | 1674-6767 |
| DOI | 10.1007/s40333-021-0010-8 |
| 通讯作者 | Xu, Bingcheng(Bcxu@ms.iswc.ac.cn) |
| 英文摘要 | Switchgrass is an introduced C-4 grass in the semi-arid Loess Plateau of China, but there is a lack of information to assess its ecological invasive risk. In this study, Old World bluestems (native C-4 grass) and switchgrass were sowed at five mixture ratios (8:0, 6:2, 4:4, 2:6 and 0:8) under two soil water levels (80% field capacity (FC) and 40% FC) and two nitrogen (N) treatments (0 and 100 mg N/kg dry soil, termed N-0-unfertilized and N-1-fertilized treatments, respectively) in a pot experiment in 2012. Biomass, root morphological traits and relative competitive abilities of these two species were analyzed. Results showed that biomass of both species was significantly greater under 80% FC or N fertilization, and switchgrass had a relatively larger root:shoot ratio (RSR). Total root length (TRL) and root surface area (RSA) of switchgrass were significantly higher under 80% FC irrespective of N treatment, while those of Old World bluestems were only significantly higher under N fertilization. N had no significant effect on TRL and RSA of switchgrass, while RSA of Old World bluestems significantly increased under 80% FC and N fertilization. Under 40% FC and N-0-unfertilized treatment, the aggressivity of Old World bluestems was larger than zero at 2:6 and 4:4 mixture ratios of two species, whereas it was close to zero at 6:2 mixture ratio. Root competitive ability of switchgrass significantly increased under 80% FC or N fertilization. The aggressivity of Old World bluestems was negative at 6:2 mixture ratio under 80% FC and N fertilization, while it was positive at 2:6 mixture ratio. Switchgrass may become more aggressive when N deposition or rainfall increases, while a proper mixture ratio with appropriate water and N management could help with grassland management in the semi-arid Loess Plateau. |
| WOS关键词 | PLANT INVASION ; SWITCHGRASS ; DEPOSITION ; DIVERSITY ; BIOENERGY ; RESPONSES ; TRAITS ; STRESS ; FERTILIZATION ; PRECIPITATION |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000685300400006 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/164571]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xu, Bingcheng |
| 作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Yulin Univ, Coll Life Sci, Yulin 719000, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Wenli,Xu, Weizhou,Gao, Zhijuan,et al. Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China[J]. JOURNAL OF ARID LAND,2021,13(7):730-743. |
| APA | Ding, Wenli,Xu, Weizhou,Gao, Zhijuan,&Xu, Bingcheng.(2021).Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China.JOURNAL OF ARID LAND,13(7),730-743. |
| MLA | Ding, Wenli,et al."Effects of water and nitrogen on growth and relative competitive ability of introduced versus native C-4 grass species in the semi-arid Loess Plateau of China".JOURNAL OF ARID LAND 13.7(2021):730-743. |
入库方式： OAI收割
来源：地理科学与资源研究所
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