Full TGIF Record # 53341
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Web URL(s):http://www.jstor.org/stable/2558726
    Last checked: 12/18/2015
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Publication Type:
i
Refereed
Author(s):Newberry, R. M.; Wolfenden, J.; Mansfield, T. A.; Harrison, A. F.
Author Affiliation:Newbery, Wolfenden, and Mansfield: Division of Biological Sciences, Institute of Environmental & Biological Sciences, Lancaster University, Lancaster LA1 4YQ, UK. Harrison: Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU, UK
Title:Nitrogen, phosphorus and potassium uptake and demand in Agrostis capillaris: the influence of elevated CO₂ and nutrient supply
Source:New Phytologist. Vol. 130, No. 4, August 1995, p. 565-574.
Publishing Information:Oxford, England: Cambridge University Press.
# of Pages:10
Keywords:TIC Keywords: Nitrogen uptake; Phosphorus uptake; Potassium uptake; Agrostis tenuis; Carbon dioxide; Carbon dioxide enrichment; Bioassay; Nutrient status improvement; Nutrient availability; Growth; Efficiency
Abstract/Contents:"Responses to elevated CO₂ have been studied using Agrostis capillaris L., an upland grass which is abundant on nutrient-poor soils. Plants were grown in sand culture with a wide range of nitrogen, phosphorus and potassium concentrations, and the impact of CO₂ on the demand for nutrients was determined using isotopic root bioassays. Plants grown with the smallest concentrations of N and P showed typical foliar symptoms associated with deficiencey of these elements. However, even when supplies of N and P were limiting to growth, additional CO₂ (250 ppm above ambient) influenced neither total N nor total P in above-ground tissues, nor nutrient demands as indicated by the bioassay. The estimates of the demand of the plants for K from the ⁸⁶Rb bioassay indicated an appreciable increase when plants were raised in elevated CO₂. For plants of the same size with the same nutrient appreciable increase when plants were raised in elevated CO₂ consistently displayed an increased internal demand for K. Uptake of K was not however, enhanced by elevated CO₂ even in non-limiting conditions and it might therefore be limited by a factor other than K supply. The overall conclusion from the experiments is that when A. capillaris is grown in elevated CO₂, uptake on N, P and K fails to increase proportionally with dry mass. This was true even when nutrient supplies were adequate, and it appears that nutrient-use-efficiency might increase to enable the plants to maintain growth in elevated CO₂."
Language:English
References:39
See Also:Other items relating to: Potassium
Note:Figures
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Newberry, R. M., J. Wolfenden, T. A. Mansfield, and A. F. Harrison. 1995. Nitrogen, phosphorus and potassium uptake and demand in Agrostis capillaris: the influence of elevated CO₂ and nutrient supply. New Phytol. 130(4):p. 565-574.
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http://www.jstor.org/stable/2558726
    Last checked: 12/18/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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