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Dynamics of a Soil Microbial Community under Spring Wheat

2002; Wiley; Volume: 66; Issue: 3 Linguagem: Inglês

10.2136/sssaj2002.0826

1435-0661

Søren O. Petersen, Pamela S. Frohne, Ann C. Kennedy,

Plant and fungal interactions

Soil Science Society of America JournalVolume 66, Issue 3 p. 826-833 Division S-3—Soil Biology & Biochemistry Dynamics of a Soil Microbial Community under Spring Wheat Søren O. Petersen, Corresponding Author Søren O. Petersen soren.o.petersen@agrsci.dk Danish Institute of Agricultural Sciences, Dept. Crop Physiology and Soil Science, P.O. Box 50, DK-8830 TjeleCorresponding author (soren.o.petersen@agrsci.dk)Search for more papers by this authorPamela S. Frohne, Pamela S. Frohne USDA-ARS, Land Management and Water Conservation Unit, 215 Johnson Hall, Washington State University, Pullman, WA, 99164-6421Search for more papers by this authorAnn C. Kennedy, Ann C. Kennedy USDA-ARS, Land Management and Water Conservation Unit, 215 Johnson Hall, Washington State University, Pullman, WA, 99164-6421Search for more papers by this author Søren O. Petersen, Corresponding Author Søren O. Petersen soren.o.petersen@agrsci.dk Danish Institute of Agricultural Sciences, Dept. Crop Physiology and Soil Science, P.O. Box 50, DK-8830 TjeleCorresponding author (soren.o.petersen@agrsci.dk)Search for more papers by this authorPamela S. Frohne, Pamela S. Frohne USDA-ARS, Land Management and Water Conservation Unit, 215 Johnson Hall, Washington State University, Pullman, WA, 99164-6421Search for more papers by this authorAnn C. Kennedy, Ann C. Kennedy USDA-ARS, Land Management and Water Conservation Unit, 215 Johnson Hall, Washington State University, Pullman, WA, 99164-6421Search for more papers by this author First published: 01 May 2002 https://doi.org/10.2136/sssaj2002.8260Citations: 56Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract In arable systems, seasonal fluctuations of microbiological properties can be significant. We hypothesized that adaptation to soil environmental conditions may contribute to the variation observed, and this was examined by characterization of different microbial community attributes under a range of soil conditions. Soil was sampled from no-till and chisel-tilled fields within a long-term experiment in eastern Washington during growth of spring wheat (Triticum aestivum). The range of soil environmental conditions covered was extended by amendment of crop residues. Soil samples were characterized with respect to biomass N and biomass P, substrate utilization dynamics, phospholipid fatty acid (PLFA) profiles and whole-soil fatty acid (MIDI-FA) profiles, and with respect to soil environmental variables (bulk density, soil organic C [SOC], temperature, moisture, and inorganic N and P). Bacterial and fungal lipid biomarkers were negatively correlated (P < 0.001), confirming that these subsets of fatty acids are associated with contrasting components of the microbial biomass. Biomass N was closely associated with soil conditions, notably N availability. The proportion of substrates used with no apparent lag phase decreased during summer and was negatively correlated with lipid stress indicators. Cyclopropyl fatty acids accounted for more than 60% of the variation in bacterial PLFA. These observations suggest that adaptation to environmental stresses was partly responsible for the microbial dynamics observed. Tillage practice had little effect on the relationships between soil conditions and microbiological properties. The results showed that MIDI-FA included a significant background of nonmicrobial material and was less sensitive to soil environmental conditions than PLFA. Citing Literature Volume66, Issue3May 2002Pages 826-833 RelatedInformation