Full TGIF Record # 40371
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Publication Type:
Author(s):van Ginkel, J. H.; Gorissen, A.; van Veen, J. A.
Author Affiliation:DLO Research Institute for Agrobiology and Soil Fertility (AB-DLO), Department of Soil Ecology, P.O. Box 14, 6700 AA Wageningen, The Netherlands and Institute for Evolutionary Sciences, Leiden University, Leiden, The Netherlands
Title:Carbon and nitrogen allocation in Lolium perenne in response to elevated atmospheric CO₂ with emphasis on soil carbon dynamics
Source:Plant and Soil. Vol. 188, No. 2, January 1997, p. 299-308.
# of Pages:9
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
Related Web URL:http://link.springer.com/article/10.1023/A%3A1004233920896
    Last checked: 10/14/2015
    Notes: Abstract only
Keywords:TIC Keywords: Carbon; Nitrogen; Lolium perenne; Root growth; Partitioning; Biomass; Mineralization
Abstract/Contents:"The effect of elevated CO₂ on the carbon and nitrogen distribution within perennial ryegrass (L. perenne L.) and its influence on belowground processes were investigated. Plans were homogeneously ¹⁴C-labelled in two ESPAS growth chambers in a continuous ¹⁴C-CO₂ atmosphere of 350 and 700 μL L⁻¹ CO₂ and at two soil nitrogen regimes, in order to follow the carbon flow through all plant and soil compartments. After 79 days, elevated CO₂ increased the total carbon uptake by 41 and 21% at loe (LN) and high nitrogen (HN) fertilisation, respectively. Shoot growth remained unaffected, wheras CO₂ enrichment stimulated root growth by 46% and the root/soil respiration by 111%, irrespective of the nitrogen concentration. The total ¹⁴C-soil content increased by 101 and 28% at LN and HN, respectively. The decomposition of the native soil organic matter was not affected either by CO₂ or by the nitrogen treatment. Elevated CO₂ did not change the total nitrogen uptake of the plant either at LN or at HN. Both at LN and HN elevated CO2 significantly increased the total amount of nitrogen taken up by the roots and decreased the absolute and relative amounts translocated to the shoots. The amount of soil nitrogen immobilised by the micro-organisms and the size of the soil microbial biomass were not affected by the elevated CO₂, whereas both were significantly increased at the higher soil N content. Most striking was the 88% increase in net carbon input into the soil expressed as: ¹⁴C-roots plus total ¹⁴C-soil content minus the ¹²C-carbon released by decomposition of native soil organic matter. The net carbon input into the soil at ambient CO₂ corresponded with 841 and 1662 kg ha⁻¹ at LN and HN, respectively. Elevated CO₂ increased these amounts with an extra carbon input of 950 and 1056 kg ha⁻¹. Combined with a reduced decomposition rate of plant material grown at elevated CO₂ this will probably lead to carbon storage in grassland soils resulting in a negative feed back on the increasing CO₂ concentration of the atmosphere."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
van Ginkel, J. H., A. Gorissen, and J. A. van Veen. 1997. Carbon and nitrogen allocation in Lolium perenne in response to elevated atmospheric CO₂ with emphasis on soil carbon dynamics. Plant Soil. 188(2):p. 299-308.
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