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| DOI: | 10.1016/j.soilbio.2010.01.003 |
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| Web URL(s): | http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071710000167&_check=y&_origin=article&_zone=toolbar&_coverDate=30-Apr-2010&view=c&originContentFamily=serial&wchp=dGLbVlt-zSkWb&md5=3e45d29d8c6fa92ced6385bbcd90f521/1-s2.0-S0038071710000167-main.pdf
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Last checked: 03/14/2012
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| Publication Type:
| Refereed |
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| Author(s): | Yao, Huaiying;
Shi, Wei |
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| Author Affiliation: | Yao and Shi: Soil Science Department, North Carolina State University, Raleigh, NC; Yao: Environmental and Resource Sciences, Zhejiang University, Zhejiang, PR, China |
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| Title: | Soil organic matter stabilization in turfgrass ecosystems: Importance of microbial processing |
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| Source: | Soil Biology & Biochemistry. Vol. 42, No. 4, April 2010, p. 642-648. |
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| Publishing Information: | Pergamon |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Biodegradation; Carbon isotope ratio; Carbon sequestration; Isotopes; Microbial activity; Nitrogen; Organic matter; Soil analysis; Soil pH; Soil stabilization
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| Abstract/Contents: | "Biochemical modification of plant materials may contribute considerably to the formation and stabilization of soil organic matter, but its significance remains elusive in turfgrass systems. This study aimed to close this knowledge gap by examining the dynamics of soil organic matter in turfgrass systems as well as its stability using Δ13C and Δ15N records. Two geographic locations, each containing 3 or 4 turfgrass systems of different ages were used as the study sites because site-associated differences, in particular soil pH (alkaline versus acidic) might cause divergence in microbial processing during organic matter decomposition and resynthesis. We observed that soil C storage was ~12% greater in the alkaline site than the acidic one. In addition, accumulation rates of soil organic C and N were about 3-fold higher in the alkaline site. Soil organic matter was physically fractionated into light and heavy fractions. Heavy fraction from the alkaline site mineralized more slowly than the acidic one, indicating that soil organic matter was more stable in the alkaline site. Furthermore, the stability of soil organic matter based upon Δ15N records and C-to-N ratio of organic matter was again found to be more stable in the alkaline site than the acidic one. While both soil Δ13C and Δ15N increased as turfgrass systems aged, rates were greater in the alkaline site than the acidic one. Temporal shifts in soil Δ13C and Δ15N were attributed mainly to isotope fractionation associated with microbial processes rather than selective preservation of 13C- or 15N-enriched chemical compounds of plant materials. Our results suggested that microbial decomposition and resynthesis played an important role in organic matter stabilization in turfgrass systems and this microbial processing could be managed via microbial activity-regulating factors, such as soil pH." |
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| Language: | English |
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| References: | 40 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yao, H., and W. Shi. 2010. Soil organic matter stabilization in turfgrass ecosystems: Importance of microbial processing. Soil Biol. Biochem. 42(4):p. 642-648. |
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| DOI: 10.1016/j.soilbio.2010.01.003 |
| Web URL(s):
http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071710000167&_check=y&_origin=article&_zone=toolbar&_coverDate=30-Apr-2010&view=c&originContentFamily=serial&wchp=dGLbVlt-zSkWb&md5=3e45d29d8c6fa92ced6385bbcd90f521/1-s2.0-S0038071710000167-main.pdf
Last checked: 03/14/2012
Requires: PDF Reader
Access conditions: Item is within a limited-access website
http://www.sciencedirect.com/science/article/pii/S0038071710000167
Last checked: 03/14/2012
Access conditions: Item is within a limited- access website |
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MSU catalog number: b2217194 |
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