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Web URL(s): | http://www.jstor.org/stable/2558726 Last checked: 12/18/2015 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| 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
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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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| Web URL(s): http://www.jstor.org/stable/2558726 Last checked: 12/18/2015 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: QK 1 .N38 |
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