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DOI | 10.3389/fpls.2021.792123 |
Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin | |
Li, Chunli; Li, Yonghui; Li, Xinwei; Ma, Li; Xiao, Yuanming; Zhang, Chunhui | |
通讯作者 | Zhang, CH (通讯作者),Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining, Peoples R China. |
发表日期 | 2021 |
ISSN | 1664-462X |
卷号 | 12 |
英文摘要 | Climate, land-use changes, and nitrogen (N) deposition strongly impact plant primary productivity, particularly in alpine grassland ecosystems. In this study, the differential responses of plant community primary productivity to N and phosphorus (P) nutrient application were investigated in the natural (NG) and Grain for Green restored (RG) alpine grasslands by a continuous 3-year experiment in the Qinghai Lake Basin. N addition only significantly promoted plant aboveground biomass (AGB) by 42% and had no significant effect on belowground biomass (BGB) and total biomass (TB) in NG. In comparison with NG, N addition elevated AGB and BGB concurrently in RG by 138% and 24%, respectively, which further significantly increased TB by 41% in RG. Meanwhile, N addition significantly decreased BGB and the AGB ratio (R/S) both in NG and RG. Compared with N addition, P addition did not perform an evident effect on plant biomass parameters. Additionally, AGB was merely negatively influenced by growing season temperatures (GST) under the N addition treatment in NG. AGB was negatively associated with GST but positively related to growing season precipitation (GSP) in RG. By contrast, changes in the R/S ratio in RG were positively correlated with GST and negatively related to GSP. In sum, the results revealed that plant community biomass exhibited convergent (AGB and R/S) and divergent (BGB and TB) responses to N addition between NG and RG. In addition, the outcomes suggested that climate warming would enhance plant biomass allocation to belowground under ongoing N deposition, and indicated the significance of precipitation for plant growth and AGB accumulation in this restored alpine grassland ecosystem. |
关键词 | SOIL-PHOSPHORUS FRACTIONSNITROGEN ADDITIONTIBETAN PLATEAUINCREASED PRECIPITATIONTERRESTRIAL ECOSYSTEMSATMOSPHERIC NITROGENCARBON ALLOCATIONSTIPA-PURPUREACO-LIMITATIONMEADOW |
英文关键词 | alpine grassland; plant primary productivity; nitrogen and phosphorus additions; restored grassland; climate change |
语种 | 英语 |
WOS研究方向 | Plant Sciences |
WOS类目 | Plant Sciences |
WOS记录号 | WOS:000738862400001 |
来源期刊 | FRONTIERS IN PLANT SCIENCE |
来源机构 | 中国科学院西北生态环境资源研究院 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/254383 |
作者单位 | [Li, Chunli; Li, Yonghui; Li, Xinwei; Zhang, Chunhui] Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining, Peoples R China; [Ma, Li] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Cold Reg Restorat Ecol, Xining, Peoples R China; [Xiao, Yuanming] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xining, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Chunli,Li, Yonghui,Li, Xinwei,et al. Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin[J]. 中国科学院西北生态环境资源研究院,2021,12. |
APA | Li, Chunli,Li, Yonghui,Li, Xinwei,Ma, Li,Xiao, Yuanming,&Zhang, Chunhui.(2021).Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin.FRONTIERS IN PLANT SCIENCE,12. |
MLA | Li, Chunli,et al."Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin".FRONTIERS IN PLANT SCIENCE 12(2021). |
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