Summary
Net carbon dioxide exchange (NCE) rates were measured in a tallgrass prairie, a grassland with high productivity, to determine photosynthetic rates of the canopy. Canopy measurements were made in large, plexiglass chambers (1.21 m long; 0.91 m wide; 1.40 m tall) placed on burned and unburned areas of the prairie. The NCE rates of the canopy were compared with those of individual leaves ofAndropogon gerardii Vitman (big bluestem). In addition, CO2 flux from the soil was quantified and compared with net photosynthetic flux. The canopy NCE rates were generally lower than those made on individual leaves. In mid-summer (11 July 1987), the maximum canopy NCE rates were 55% and 64% of those measured on individual leaves in burned and unburned treatments, respectively. Canopy NCE rates were lower than individual-leaf NCE rates for two reasons. First, the individualleaf measurements were made on young, unshaded, healthy leaves, while the canopy measurements were made on all types of leaves including senescing, shaded, and damaged leaves. Second, soil CO2 flux into the chambers lowered NCE values. The CO2 flux from the soil ranged from 7.2% to 28.4% of the total NCE. One needs to add soil CO2 flux rates to the measured canopy NCE rates to obtain canopy NCE rates closer to individual-leaf NCE rates. Soil CO2 flux decreased when conditions became dry, reaching a low of 0.06 mg CO2m−2s−1, but increased after rain to 0.16 mg CO2m−2s−1. Also, after rain, when plants were well watered, they were not light saturated at 1 900 µEm−2s−1. The NCE rates on the burned treatment were either higher or similar to those on the unburned treatment. For example, on 11 July 1987, NCE rates were higher on the burned treatment (0.66 mg CO2m−2s−1) compared to the unburned treatment (0.47 mg CO2m−2s−1). During the rest of July and August, the rates of the two treatments were not significantly different. But in September and October, the NCE rates were again higher on the burned treatment compared to the unburned treatment. The results indicated that canopy NCE rates may be more indicative of the productivity of the prairie than individual-leaf measurements made only on young, highly productive leaves.
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Anderson, J. P. E., 1982: Soil respiration. In: Page A. L., Miller R. H., Keeney, D. R. (eds.)Methods of Soil Analysis. Part 2. Chemical and Microbiological Properties. 2nd ed. American Society of Agronomy, Soil Science Society of America, Madison, Wisconsin, pp. 831–871.
Brown, L. F., Trlica, M. J., 1977: Carbon dioxide exchange of blue grama swards as influenced by several ecological variables in the field.J. Appl. Ecol. 14, 204–213.
Hulbert, L. C., 1969: Fire and litter effects in undisturbed bluestem prairie in Kansas.Ecology 50, 874–877.
Jantz, D. R., Harner, R. F., Rowland, H. T., Gier, D. A., 1975: Soil survey of Riley County and part of Geary County, Kansas. United States Department of Agriculture, Soil Conservation Service and Kansas State University Agricultural Experiment Station, Manhattan, Kansas, 71 pp. + maps.
Jarvis, P. G., Čatský, J., 1971: Gas exchange systems. In: Šesták, Z., Čatský, J., Jarvis, P. G., (eds),Plant photosynthetic production. Manual of Methods. Dr. W. Junk, The Hague, The Netherlands, pp. 50–56.
Kanemasu, E. T., Powers, W. L., Sij, J. W., 1974: Field chamber measurements of CO2 flux from soil surface.Soil Sci. 118, 233–237.
Knapp, A. K., 1984: Post-burn differences in solar radiation, leaf temperature and water stress influencing production in a lowland tallgrass prairie.Am. J. Bot. 71, 220–227.
Knapp, A. K., 1985: Effect of fire and drought on the cophysiology ofAndropogon gerardii and Panicum virgatum in a tallgrass prairie.Ecology 66, 1309–1320.
Knapp, A. K., Gilliam, F. S., 1985: Response ofAndropon gerardii (Poaceae) to fire-induced high vs. low irradiance environments in tallgrass prairie: leaf structure and photosynthetic pigments.Am. J. Bot. 72, 1668–1671.
Knapp, A. K., Seastedt, T. R., 1986: Detritus accumulation limits productivity of tallgrass prairie.BioScience 336, 662–668.
Kucera, C. L., Ehrenreich, J. H., 1962: Some effects of annual burning on central Missouri prairie.Ecology 43, 334–336.
Kucera, C. L., Kirkham, D. R., 1971: Soil respiration studies in tallgrass prairie in Missouri.Ecology 52, 912–915.
Lundegardh, H., 1927: Carbon dioxide evolution of soil and crop growth.Soil Sci. 23, 417–454.
Monteith, J. L., Szeicz, G., Yakuki, K., 1964: Crop photosynthesis and the flux of carbon dioxide below the canopy.J. Appl. Ecol. 1, 321–337.
Moss, D. N., Musgrave, R. B., Lemon, E. R., 1961: Photosynthesis under field conditions. III. Some effects of light, carbon dioxide, temperature and soil moisture on photosynthesis, respiration and transpiration of corn.Crop. Sci. 1, 83–87.
Owensby, C. E., 1973. Modified step-point system for botanical composition and basal cover estimates.J. Range Manage 26, 302–303.
Peet, M., Anderson, R., Adams, M. S., 1975: Effects of fire on bluestem production.Am. Midland Natur 94, 15–25.
Sij, J. W., Kanemasu, E. T., Teare, I. D., 1972. Stomatal resistance, net photosynthesis, and transpiration in PMA-treated sorghum: a field study.Crop. Sci. 12, 733–735.
Steel, R. G. D., Torrie, J. H., 1960:Principles and Procedures of Statistics. McGraw-Hill, New York, 481 pp.
Towne, G., Owensby, C., 1984: Long-term effects of annual burning at different dates in ungrazed Kansas tallgrass prairie.J. Range. Manage. 37, 392–397.
Weaver, J. E., Rowland, N. W., 1952: Effects of excessive natural mulch on development, yield and structure of native grassland.Bot. Gaz. 114, 1–19.
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Contribution No. 89-82-J from the Kansas Agricultural Experiment Station. This research was supported, in part, by Grant No. DE-FG02-84ER60253.A000.
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Gale, W.J., Kirkham, M.B., Kanemasu, E.T. et al. Net carbon dioxide exchange in canopies of burned and unburned tallgrass prairie. Theor Appl Climatol 42, 237–244 (1990). https://doi.org/10.1007/BF00865984
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DOI: https://doi.org/10.1007/BF00865984