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Nitrogen competition between three dominant plant species and microbes in a temperate grassland
Ouyang S. N.; Tian, Y. Q.; Liu, Q. Y.; Zhang, L.; Wang, R. X.; Xu, X. L.
Source PublicationPlant and Soil
2016
Volume408
Issue1-2
Pages121-132
KeywordInorganic N Microbes N-15 Root N uptake Temperate grassland amino-acids soil-microorganisms organic-nitrogen inorganic nitrogen alpine meadow n forms acquisition ecosystem tundra roots
AbstractTo test the hypothesis that dominant plant species could acquire different nitrogen (N) forms over a spatial scale and they also have the ability to compete for available N with microbes. A short-term N-15 labeling experiment was conducted in the temperate grassland ecosystem of North China in July of 2013. Three N forms (NO3 (-) (,) NH4 (+) and glycine) labeled with N-15 were injected into the two soil depths (0-5 and 5-15 cm) surrounding each plant to explore N acquisition by plants and microbes. Three dominant plant species (Artemisia frigida, Cleistogenes squarrosa and Artemisia capillaris) were investigated. Two hours after N-15 labeling, all three dominant plant species absorbed both organic and inorganic N, but different patterns were observed at two soil depths. Uptake of NO3 (-) was significantly higher at 0-5 cm than at 5-15 cm soil depth among all the dominant plant species. N-15 recovery by microbes was significantly higher than plants. However, N-15 recovery by plants showed different patterns over soil depths. Dominant plant species in the temperate grassland have different patterns in acquisition of N added to soil in organic form and absorption of inorganic N, and microbes were more effectively than plants at competing for N in a short-term period.
Indexed BySCI
Language英语
ISSN0032-079X
DOI10.1007/s11104-016-2904-3
Citation statistics
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43155
Collection历年回溯文献
Recommended Citation
GB/T 7714
Ouyang S. N.,Tian, Y. Q.,Liu, Q. Y.,et al. Nitrogen competition between three dominant plant species and microbes in a temperate grassland. 2016.
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