NDLI: Nitrogen competition between three dominant plant species and microbes in a temperate grassland

Content Provider	Springer Nature Link
Author	Ouyang, Shengnan Tian, Yuqiang Liu, Qianyuan Zhang, Li Wang, Ruixue Xu, Xingliang
Copyright Year	2016
Abstract	To 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 $^{15}$N labeling experiment was conducted in the temperate grassland ecosystem of North China in July of 2013. Three N forms (NO$_{3}$ $^{−}$ $_{,}$ NH$_{4}$ $^{+}$ and glycine) labeled with $^{15}$N 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 $^{15}$N labeling, all three dominant plant species absorbed both organic and inorganic N, but different patterns were observed at two soil depths. Uptake of NO$_{3}$ $^{−}$ was significantly higher at 0–5 cm than at 5–15 cm soil depth among all the dominant plant species. $^{15}$N recovery by microbes was significantly higher than plants. However, $^{15}$N 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.
Starting Page	121
Ending Page	132
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	408
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-05-08
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic N Microbes $^{15}$N Root N uptake Temperate grassland Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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