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| Web URL(s): | https://link.springer.com/article/10.1023/A%3A1004771805022
Last checked: 09/27/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Jastrow, J. D.;
Miller, R. M.;
Owensby, C. E. |
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| Author Affiliation: | Jastrow and Miller: Environmental Research Division, Argonne National Laboratory, Argonne, IL; Owensby: Department of Agronomy, Kansas State University, Manhattan, KS |
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| Title: | Long-term effects of elevated atmospheric CO₂ on below-ground biomass and transformations to soil organic matter in grassland |
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| Meeting Info.: | Capri, Italy: September 24-27, 1998 |
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| Source: | Plant and Soil. Vol. 224, No. 1, 2000, p. 85-97. |
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| Publishing Information: | Dordrecht, Netherlands: Kluwer Academic Publishers |
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| # of Pages: | 13 |
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| Keywords: | TIC Keywords: Biomass; Organic matter; Grasslands; Nitrogen; Roots; Prairie soils; Rhizomes; Carbon; Growth; Nitrogen uptake; Nitrogen cycle; Andropogon gerardii; Sorghastrum nutans
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| Abstract/Contents: | "We determined the effects of elevated [CO₂] on the quantity and quality of below-ground biomass and several soil organic matter pools at the conclusion of an eight-year CO₂ enrichment experiment on native tallgrass prairie. Plots in open-top chambers were exposed continuously to ambient and twice-ambient [CO₂] from early April through late October of each year. Soil was sampled to a depth of 30 cm beneath and next to the crowns of C4 grasses in these plots and in unchambered plots. Elevated [CO₂] increased the standing crops of rhizomes (87%), coarse roots (46%), and fibrous roots (40%) but had no effect on root litter (mostly fine root fragments and sloughed cortex material >500 μm). Soil C and N stocks also increased under elevated [CO₂], with acculmulations in the silt/clay fraction over twice that of particulate organic matter (POM; >53 μm). The mostly root-like, light POM (density ≤1.8 Mg m ³) appeared to turn over more rapidly, while the more amorphous and rendered heavy POM (density >1.8 Mg m ³) accumulated under elevated [CO₂]. Overall, rhizome and root C:N ratios were not greatly affected by CO₂ enrichment. However, elevated [CO₂] increased the C:N ratios of root litter and POM in the surface 5 cm and induced a small but significant increase in the C:N ratio of the silt/clay fraction to a depth of 15 cm. Our data suggest that 8 years of CO₂ enrichment may have affected elements of the N cycle (including mineralization, immobilization, and asymbiotic fixation) but that any changes in N dynamics were insufficient to prevent significant plant growth responses." |
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| Language: | English |
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| References: | 35 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Jastrow, J. D., R. M. Miller, and C. E. Owensby. 2000. Long-term effects of elevated atmospheric CO₂ on below-ground biomass and transformations to soil organic matter in grassland. Plant Soil. 224(1):p. 85-97. |
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| Web URL(s):
https://link.springer.com/article/10.1023/A%3A1004771805022
Last checked: 09/27/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
| 
MSU catalog number: SB 13 .P55 |
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