By Peter S. Curtis, Elizabeth G. O’Neill, James A. Teeri, Donald R. Zak, Kurt S. Pregitzer (auth.), Peter S. Curtis, Elizabeth G. O’Neill, James A. Teeri, D. R. Zak, K. S. Pregitzer (eds.)
As atmospheric CO2 raises there'll probably be adjustments in soil carbon fluxes. it really is most probably that such adjustments should be observed by way of adjustments within the partitioning of carbon among natural constructions and to soil methods. those alterations have the potential of extra changing the constitution and serve as of terrestrial ecosystems. whereas there was expanding acceptance of the significance of soil-mediated responses to international weather switch, the character and significance of those responses are usually not good understood. so one can extend our overview of the importance of belowground responses to emerging atmospheric CO2, a workshop has been prepared that ended in the peer-reviewed contributions which are contained during this quantity.
Read Online or Download Belowground Responses to Rising Atmospheric CO2: Implications for Plants, Soil Biota, and Ecosystem Processes: Proceedings of a workshop held at the University of Michigan Biological Station, Pellston, Michigan, USA, May 29–June 2, 1993 PDF
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Extra resources for Belowground Responses to Rising Atmospheric CO2: Implications for Plants, Soil Biota, and Ecosystem Processes: Proceedings of a workshop held at the University of Michigan Biological Station, Pellston, Michigan, USA, May 29–June 2, 1993
Sample text
Plants. however, differed in their response to elevated CO 2 . Interaction between CO 2 and N availability Low N plants weighed on average only 10% less than high N plants grown at high CO 2 and were able to reach this comparable dry weight with 50% less N in their tissues. These data differ greatly from those of Thomas et aI. (1993) who observed no stimulation of growth by elevated CO 2 in their low N treatment. Plants in their low N treatment were in average four times smaller than ours. The fact that we obtained large plants in our low N treatment and that leaf and plant N concentrations did not decline in our high N treatment at elevated compared to low CO 2 level (see first paragraph discussion) suggest that plants had more N available to them than was the case in Thomas et al.
The use of perlite (a media with large pore size distribution) may have allowed for unimpeded root elongation, leading to large increases in root length without the added expense of extensive branching. Conversely, Del Castillo et al.
1994). 0 in 1991. 50 m perpendicular to the row. In 1990, 192 soil cores were taken at each sampling, representing four cores per position within each subplot. In 1991, the number of cores per position was increased to eight, increasing the total number ofcores per sampling to 384. , 1994). A large custom-built cool- 36 er was used to transport samples by truck to Auburn, AL, where they were placed in cold storage until processing. A hand-held electric band saw was used to cut each 90 cm core into 15 cm segments.