Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Spatio-temporal variations determine plant-microbe competition for inorganic nitrogen in an alpine meadow | |
Xu, Xingliang1; Ouyang, Hua1; Richter, Andreas2; Wanek, Wolfgang2; Cao, Guangmin3; Kuzyakov, Yakov4 | |
2011-03-01 | |
发表期刊 | JOURNAL OF ECOLOGY |
ISSN | 0022-0477 |
卷号 | 99期号:2页码:563-571 |
文章类型 | Article |
摘要 | 1. Plant microbe competition for available nitrogen (N) has been suggested to be an important mechanism controlling N limitation of plants in a variety of ecosystems. However, spatio-temporal patterns of competition between plants and microbes for soil N remain unclear. 2. Short-term (15)N tracer experiments were conducted during a growing season (July, August and September) in an alpine meadow on the Tibetan Plateau to unravel spatio-temporal patterns of plant microbe competition for NH(4)(+) and NO(3)(-). 3. Alpine plants were poorer competitors than soil microorganisms for inorganic N in July compared with August and September. Occupation of soil volume by roots and root density (high in August and September) played a greater role in plant microbe competition than air temperature or precipitation (high in July). 4. In topsoils (0-5 cm, highest root density), alpine plants effectively competed with soil microorganisms for N and showed a preference for (15)NO(3)(-), while soil microorganisms that preferentially took up (15)NH(4)(+) out-competed plants below 5 cm soil depth (lower root density). Competition between plants and soil microorganisms for inorganic N strongly depended on root density (P < 0.0001, R(2) = 0.93, exponential decay model). 5. Synthesis. Plant-microbe competition for inorganic N showed a clear spatio-temporal pattern in alpine meadows depending on (i) root density and therefore soil depth, (ii) inorganic N form, and (iii) different periods during the growing season. These findings have important implications for our understanding of above-ground below-ground interactions and plant-microbial competition for available N.; 1. Plant microbe competition for available nitrogen (N) has been suggested to be an important mechanism controlling N limitation of plants in a variety of ecosystems. However, spatio-temporal patterns of competition between plants and microbes for soil N remain unclear. |
关键词 | (15)n Tracer Alpine Kobresia Meadow Ammonium Inorganic n Nitrate Plant-microbe Competition Plant-soil (Below-ground) Interactions Rhizosphere Interactions Spatio-temporal Pattern |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
关键词[WOS] | ARCTIC SALT-MARSH ; SOIL MICROBES ; ORGANIC-NITROGEN ; AMINO-ACIDS ; SEASONAL-VARIATION ; RHIZOSPHERE MICROORGANISMS ; VERTICAL-DISTRIBUTION ; TEMPERATE GRASSLANDS ; MINERAL-NUTRITION ; WILD PLANTS |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
WOS类目 | Plant Sciences ; Ecology |
WOS记录号 | WOS:000287785300022 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/1578 |
专题 | 中国科学院西北高原生物研究所 |
作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Vienna, Dept Chem Ecol & Ecosyst Res, A-1090 Vienna, Austria 3.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China 4.Univ Bayreuth, Dept Agroecosyst Res, D-95440 Bayreuth, Germany |
推荐引用方式 GB/T 7714 | Xu, Xingliang,Ouyang, Hua,Richter, Andreas,et al. Spatio-temporal variations determine plant-microbe competition for inorganic nitrogen in an alpine meadow[J]. JOURNAL OF ECOLOGY,2011,99(2):563-571. |
APA | Xu, Xingliang,Ouyang, Hua,Richter, Andreas,Wanek, Wolfgang,Cao, Guangmin,&Kuzyakov, Yakov.(2011).Spatio-temporal variations determine plant-microbe competition for inorganic nitrogen in an alpine meadow.JOURNAL OF ECOLOGY,99(2),563-571. |
MLA | Xu, Xingliang,et al."Spatio-temporal variations determine plant-microbe competition for inorganic nitrogen in an alpine meadow".JOURNAL OF ECOLOGY 99.2(2011):563-571. |
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