DOI: 10.1007/s10533-016-0268-7
Scopus记录号: 2-s2.0-84991826530
论文题名: No evidence of resource limitation to aboveground growth of blue grama (Bouteloua gracilis) on 1 ky-old semi-arid substrate
作者: Coble A.A. ; Hart S.C.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 131, 期: 2018-01-02 起始页码: 243
结束页码: 251
语种: 英语
英文关键词: Biogeochemical theory
; Nitrogen
; Nutrient use efficiency
; Phosphorus
; Substrate age gradient
; Water
Scopus关键词: aboveground biomass
; biogeochemical cycle
; concentration (composition)
; environmental gradient
; grass
; growth rate
; limiting factor
; net primary production
; nitrogen
; nutrient use efficiency
; phosphorus
; semiarid region
; soil amendment
; substrate
; water flow
; Bouteloua gracilis
英文摘要: Biogeochemical theory and a substantial body of empirical data show that nitrogen (N), an atmospherically derived nutrient, limits plant growth on young substrates, while phosphorus (P), a rock-derived nutrient, limits plant growth on old substrates. In arid regions, water is also often a limiting resource to plant growth. We applied resource amendments of N, P, N + P, and water to blue grama (Bouteloua gracilis) growing on a 1 ky-old basaltic cinder substrate to test the hypothesis that N and water limit aboveground net primary production (ANPP) in a semi-arid climate, early in soil development. Contrary to our hypothesis, ANPP did not differ among treatments, suggesting that none of the resource amendments were limiting to blue grama growth. Unamended aboveground tissue N and P concentrations were three to five times lower at the 1 ky-old site than on older (55–3000 ky-old) substrates, suggesting differences in nutrient use efficiency across the substrate age gradient. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83319
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Forestry, Northern Arizona University, PO Box 15018, Flagstaff, AZ, United States; Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States; Life & Environmental Sciences and the Sierra Nevada Research Institute, University of California, Merced, 5200 North Lake Road, Merced, CA, United States
Recommended Citation:
Coble A.A.,Hart S.C.. No evidence of resource limitation to aboveground growth of blue grama (Bouteloua gracilis) on 1 ky-old semi-arid substrate[J]. Biogeochemistry,2016-01-01,131(2018-01-02)