Evaluation of microbial methods as potential indicators of soil quality in historical agricultural fields (original) (raw)

Abstract

In agricultural ecosystems that have had consistent cropping histories, standard microbial methods may be used to evaluate past and present practices. Our objective was to evaluate several microbial methods that best indicate cropping histories and soil quality on long-term plots. We selected soil microbial carbon (C), phospholipid analyses, direct counts of total fungal and bacterial biomass, and soil enzymes (phosphatases) to measure direct and indirect microbial activity on the Sanborn Field and Tucker Prairie. The Sanborn Field has been under various cropping and management practices since 1888 and the Tucker Prairie is an uncultivated site. Seven different plots were chosen on the Sanborn Field and random samples were taken in the summit area on the Tucker Prairie, which represented a reference site. Soil microbial biomass C, phospholipids, and enzyme activity were reflective of the cropping and management histories observed on the Sanborn Field. Enzymatic activity was highly correlated to soil organic matter. The direct counts of fungal and bacterial biomass showed that fungal populations dominated these soils, which may be attributed to soil pH. Soil microbial biomass C and enzyme assays seemed to be better potential indicators of cropping histories than the other methods tested in the long-term plots.

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Authors and Affiliations

1. University of Missouri, 144 Mumford Hall, 65211, Columbia, MO, USA
   D. Jordan
2. Department of Soil and Atmospheric Sciences (School of Natural Resources), University of Missouri, 65211, Columbia, MO, USA
   D. Jordan, R. J. Kremer, W. A. Bergfield, K. Y. Kim & V. N. Cacnio
3. USDA-ARS, University of Missouri, 65211, Columbia, MO, USA
   R. J. Kremer & W. A. Bergfield

Authors

1. D. Jordan
2. R. J. Kremer
3. W. A. Bergfield
4. K. Y. Kim
5. V. N. Cacnio

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This paper has been assigned by the Missouri Agricultural Experiment Station to Journal Series no. 12043

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Jordan, D., Kremer, R.J., Bergfield, W.A. et al. Evaluation of microbial methods as potential indicators of soil quality in historical agricultural fields.Biol Fertil Soils 19, 297–302 (1995). https://doi.org/10.1007/BF00336098

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• Received: 12 December 1993
• Issue date: March 1995
• DOI: https://doi.org/10.1007/BF00336098

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