Mobilization of soil phosphate after 8 years of warming is linked to plant phosphorus-acquisition strategies in an alpine meadow on the Qinghai-Tibetan Plateau
文献类型:期刊论文
作者 | Jun Zhou6; Xiao-Long Li2,6; Fei Feng1,4,5; Chengyang Li2,5; Chimin Lai2,5; Quangang You5; Xian Xue5; Yanhong Wu6; Hongyang Sun6; Yang Chen6 |
刊名 | Global Change Biology |
出版日期 | 2021-12 |
卷号 | 27期号:24页码:6578-6591 |
ISSN号 | 1365-2486 |
关键词 | Plant Nutrient-acquisition Strategies Soil p Forms Phosphate-solubilizing Bacteria Low-molecular-weight Organic Acids Mycorrhiza Global Warming Alpine Grassland |
DOI | 10.1111/gcb.15914 |
产权排序 | 1 |
英文摘要 | Phosphorus (P) is essential for productivity of alpine grassland ecosystems, which are sensitive to global warming. We tested the hypotheses that (1) mobilized ‘calcium-bound inorganic P’ (Ca-Pi) is a major source of plant-available P in alpine meadows with alkaline soils after long-term warming, (2) mobilization of Ca-Pi is linked to effective plant carboxylate-releasing P-acquisition strategies under warming, and (3) the mobilization is also related to plant nitrogen (N)-acquisition. We conducted an 8-year warming experiment in an alpine meadow (4635 m above sea level) on the Qinghai-Tibetan Plateau. A significant increase in P concentration in both aboveground and belowground biomass indicates an increased mobilization and assimilation of P by plants under warming. We observed a significant decrease in Ca-Pi, no change in moderately-labile organic P, and an increase in highly resistant organic P after warming. There was no increase in phosphatase activities. Our results indicate that Ca-Pi, rather than organic P was the major source of plant-available P for alpine meadows under warming. Higher leaf manganese concentrations of sedges and forbs after warming indicate that carboxylates released by these plants are a key mechanism of Ca-Pi mobilization. The insignificant increase in Rhizobiales after warming and the very small cover of legumes show a minor role of N-acquisition strategies in solubilizing phosphate. The insignificant change in relative abundance of mycorrhizal fungi and bacteria related to P cycling after warming shows a small contribution of microorganisms to Ca-Pi mobilization. The significant increase in leaf N and P concentrations and N:P ratio of grasses and no change in sedge leaf N:P ratio reflect distinct responses of plant nutrient status to warming due to differences in P-acquisition strategies. We highlight the important effects of belowground P-acquisition strategies, especially plant carboxylate-releasing P-acquisition strategies on responses of plants to global changes in alpine meadows. |
URL标识 | 查看原文 |
语种 | 英语 |
源URL | [http://ir.imde.ac.cn/handle/131551/56038] |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 综合测试与模拟中心 |
通讯作者 | Fei Feng |
作者单位 | 1.International Platform for Dryland Research and Education, Tottori University 2.University of Chinese Academy of Sciences 3.School of Biological Sciences and Institute of Agriculture, University of Western Australia 4.Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in Qinghai-Tibet Plateau, Chinese Academy of Sciences 5.Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences 6.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences |
推荐引用方式 GB/T 7714 | Jun Zhou,Xiao-Long Li,Fei Feng,et al. Mobilization of soil phosphate after 8 years of warming is linked to plant phosphorus-acquisition strategies in an alpine meadow on the Qinghai-Tibetan Plateau[J]. Global Change Biology,2021,27(24):6578-6591. |
APA | Jun Zhou.,Xiao-Long Li.,Fei Feng.,Chengyang Li.,Chimin Lai.,...&Hans Lambers.(2021).Mobilization of soil phosphate after 8 years of warming is linked to plant phosphorus-acquisition strategies in an alpine meadow on the Qinghai-Tibetan Plateau.Global Change Biology,27(24),6578-6591. |
MLA | Jun Zhou,et al."Mobilization of soil phosphate after 8 years of warming is linked to plant phosphorus-acquisition strategies in an alpine meadow on the Qinghai-Tibetan Plateau".Global Change Biology 27.24(2021):6578-6591. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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