Summary
Carbon dioxide effluxes from plants, litter and soil were measured in two mixed-grassland sites in Saskatchewan, Canada. Ecosystems at both locations were dominated by Agropyron dasystachyum (Hook.) Scribn. Respiration rates of intact and experimentally-modified systems were measured in field chambers using alkali-absorption. Removal of green leaves, dead leaves, and litter from a wet sward reduced respiration to as low as 58% of the rate in an intact system. In a dry sward green shoots were the only significant above-ground source of CO2.
Carbon dioxide effluxes from different parts of A. dasystachyum plants, and from soil samples were measured in laboratory vessels at 20° using alkali-absorption. Respiration of green leaves (1.46 mg CO2 g-1 h-1) was significantly higher than microbial respiration in moist, dead leaf samples (0.79 mg CO2 g-1 h-1) or litter (0.75 mg CO2 g-1 h-1). Microbial respiration in air-dried, dead plant material was very low. Average repiration rates of roots separated from soil cores (0.24 mg CO2 g-1 h-1) were lower than many values reported in the literature, probably because the root population sampled included inactive, suberized and senescent roots. Root respiration was estimated to be 17–26% of total CO2 efflux from intact cores.
Laboratory data and field measurements of environmental conditions and plant biomass were combined in order to reconstruct the CO2 efflux from the shoot-root-soil system. Reconstructed rates were 1.3 to 2.3 times as large as field measured rates, apparently because of stimulation to respiration caused by the experimental manipulations. The standing dead and litter fractions contributed 26% and 23% of the total CO2 efflux in a wet sward. Both field-measured and reconstructed repiration values suggest that in situ decomposition of standing dead material under moist conditions can be a significant part of carbon balance in mixed grassland.
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References
Baines, G.B.K.: Plant distribution on a Saskatchewan prairie. Vegetatio 28, 99–123 (1973)
Barnard, E.L., Jorgensen, J.R.: Respiration of field-grown loblolly pine roots as influenced by temperature and root type. Can. J. Bot. 55, 740–743 (1977)
Bell, M.K.: Decomposition of herbaceous litter. In: Biology of plant litter decomposition, Vol. 1. (C.H. Dickinson, G.J.F. Pugh, eds.), pp. 37–67. London: Academic Press 1974
Billings, W.D., Peterson, K.M., Shaver, G.R., Trent, A.W.: Root growth, respiration and carbon dioxide evolution in an arctic tundra soil. Arct. Alp. Res. 9, 129–137 (1977)
Coleman, D.C.: Compartmental analysis of total soil respiration, an exploratory study. Oikos 24, 361–366 (1973)
Coupland, R.T., Ripley, E.A., Robins, P.C.: Description of site. I. Floristic composition and canopy architecture of the vegetative cover. Matador Project Tech. Rep. 11, 54 pp., University of Saskatchewan, Saskatoon (1973)
Coupland, R.T., Willard, J.R., Ripley, E.A.: Summary of activities 1967–74. Matador Project Tech. Rep 69, 244 pp., University of Saskatchewan, Saskatoon (1974)
Evans, G.C.: The quantitative analysis of plant growth. Berkeley, Los Angeles: University of California Press 1972
Edwards, N.T., Harris, W.F.: Carbon cycling in a mixed deciduous forest floor. Ecology 58, 431–437 (1977)
Frossard, J.S.: Relations entre l'eclairement des feuilles et l'absorption d'oxygène par les racines chez le tournesol (Helianthus annuus L.). Ann. Agron. 27, 435–445 (1976)
Hansen, G.K.: Adaptation to photosynthesis and diurnal oscillation of root respiration rates for Lolium multiflorum. Physiologia Plantarum 39, 275–279 (1977)
de Jong, E., Redmann, R.E., Ripley, E.A.: A comparison of methods to measure soil respiration. Unpublished manuscript
Kucera, C.L., Kirkham, D.R.: Soil respiration studies in tallgrass prairie in Missouri. Ecology 52, 912–915 (1971)
Old, S.M.: Microclimates, fire and plant production in an Illinois prairie. Ecol. Monogr. 39, 355–384 (1969)
Osman, A.M.: Root respiration of wheat plants as influenced by age, temperature and irradiance of shoots. Photosynthetica 5, 107–112 (1971)
Redmann, R.E.: Photosynthesis, respiration and water relations of Agropyron dasystachyum measured in the laboratory. Matador Project Tech. Rep. 47, 22 pp., University of Saskatchewan, Saskatoon (1974)
Redmann, R.E.: Soil respiration in a mixed grassland ecosystem. Can. J. Soil Sci. (in press)
Sauerbeck, D., Johnen, B.: Der Umsatz von Pflanzenwurzeln im Laufe der Vegetationsperiode und dessen Beitrag zur Bodenatmung. Z. Pflanzenern. Bodenk. 139, 315–328 (1976)
Šesták Z., Čatský, J., Jarvis, P.G. (eds.).: Plant photosynthetic production. Manual of methods. The Hague: Junk 1971
Tesařová, M., Gloser, J.: Total CO2 output from alluvial soils with two types of grassland communities. Pedobiologia 16, 364–372 (1976)
Walter, H., Lieth, H.: Klimadiagramm-Weltatlas. Jena: Fischer 1960
Warembourg, F.R., Paul, E.A.: Seasonal transfers of assimilated 14C in grassland: plant production and turnover, soil and plant respiration. Soil Biol. Biochem. 9, 295–301 (1977)
Wildung, R.E., Garland, T.R., Buschbom, R.L.: The interdependent effects of soil temperature and water content on soil respiration rate and plant root decomposition in arid grassland soils. Soil Biol. Biochem. 7, 373–378 (1975)
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Redmann, R.E., Abouguendia, Z.M. Partitioning of respiration from soil, litter and plants in a mixed-grassland ecosystem. Oecologia 36, 69–79 (1978). https://doi.org/10.1007/BF00344572
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DOI: https://doi.org/10.1007/BF00344572