Full TGIF Record # 62701
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Web URL(s):https://link.springer.com/article/10.1023/A%3A1004566027237
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
Publication Type:
i
Refereed
Author(s):Kuzyakov, Y.; Kretzschmar, A.; Stahr, K.
Author Affiliation:Kuzyakov and Stahr: Institute of Soil Science and Land Evaluation; and Kretzschmar: Institute for Crop Production and Grassland Research, University of Hohenheim, Stuttgart, Germany
Title:Contribution of Lolium perenne rhizodeposition to carbon turnover of pasture soil
Source:Plant and Soil. Vol. 213, No. 1/2, 1999, p. 127-136.
# of Pages:10
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
Keywords:TIC Keywords: Lolium perenne; Carbon; Roots; Respiration; Soil microorganisms; Carbon dioxide; Carbon-14; Radioactive labeling; Rhizosphere; Organic matter; Growth
Abstract/Contents:"Carbon rhizodeposition and root respiration during eight development stages of Lolium perenne were studied on a loamy Gleyic Cambisol by ¹⁴CO₂ pulse labelling of shoots in a two compartment chamber under controlled laboratory conditions. Total ¹⁴CO₂ efflux from the soil (root respiration, microbial respiration of exudates and dead roots) in the first 8 days after ¹⁴C pulse labelling decreased during plant development from 14 to 6.5% of the total ¹⁴C input. Root respiration accounted for was between 1.5 and 6.5% while microbial respiration of easily available rhizodeposits and dead root remains were between 2 and 8% of the ¹⁴C input. Both respiration processes were found to decline during plant development, but only the decrease in root respiration was significant. The average contribution of root respiration to total ¹⁴CO₂ efflux from the soil was approximately 41%. Close correlation was found between cumulative ¹⁴CO₂ efflux from the soil and the time when maximum ¹⁴CO₂ efflux occurred (r=0.97). The average total of CO₂ efflux from the soil with Lolium perenne was approximately 21 μg C-CO₂ d⁻¹g⁻¹. It increases slightly during plant development. The contribution of plant roots to total CO₂ efflux from the soil, calculated as the remainder from respiration of bare soil, was about 51%. The total ¹⁴C content after 8 days in the soil with roots ranged from 8.2 to 27.7% of assimilated carbon. This corresponds to an underground carbon transfer by Lolium perenne of 6-10 g C m⁻² at the beginning of the growth period and 50-65 g C m⁻² towards the end of the growth period. The conventional root washing procedure was found to be inadequate for the determination of total carbon input in the soil because 90% of the young fine roots can be lost."
Language:English
References:30
Note:Figures
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kuzyakov, Y., A. Kretzschmar, and K. Stahr. 1999. Contribution of Lolium perenne rhizodeposition to carbon turnover of pasture soil. Plant Soil. 213(1/2):p. 127-136.
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Web URL(s):
https://link.springer.com/article/10.1023/A%3A1004566027237
    Last checked: 09/27/2017
    Access conditions: Item is within a limited-access website
    Notes: Guide page
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