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Assessing soil quality in a riparian buffer by testing organic matter fractions in central Iowa, USA
Agroforestry Systems
  • Carmen Omaira Marquez, Iowa State University
  • Cynthia A. Cambardella, United States Department of Agriculture
  • Thomas M. Isenhart, Iowa State University
  • Richard C. Schultz, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
12-1-1998
DOI
10.1023/A:1006261519080
Abstract

A multispecies riparian buffer strip (MRB) was established along Bear Creek in central Iowa by the Agroecology Issues Team at Iowa State University (ISU) in order to assess the ability of the MRB to positively impact soil erosion and process non-point source pollutants to improve water quality. Soil organic matter (SOM), and especially biologically-active soil organic matter, is considered to be an important soil quality indicator variable because of it has relationship to critical soil functions like erodibility and the capacity of the soil to act as an environmental buffer. The objectives of this study were to examine trends in SOM C accrual and to quantify intra-seasonal changes in SOM C and particulate organic matter (POM) C for each vegetation zone of a MRBS seven years after establishment on previously cultivated or heavily grazed soil. Total SOM C and POM C in soil under perennial vegetation (poplar, switchgrass and cool season grass) were significantly higher than under cropped soil. Total POM C changed within vegetation type over the four month study period, whereas total SOM C did not. After six growing seasons, SOM C increased 8.5% under poplar grown in association with cool season grass, and 8.6% under switchgrass. The results are very promising and suggest that changes in SOM C can occur in a relatively short time after the establishment of perennial vegetation in a MRB. These changes should increase the ability of MRB soil to process non-point source pollutants.

Comments

This article is from Agroforestry Systems 44 (1998): 133, doi:10.1023/A:1006261519080.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
Carmen Omaira Marquez, Cynthia A. Cambardella, Thomas M. Isenhart and Richard C. Schultz. "Assessing soil quality in a riparian buffer by testing organic matter fractions in central Iowa, USA" Agroforestry Systems Vol. 44 Iss. 2 (1998) p. 133 - 140
Available at: http://works.bepress.com/richard_schultz/11/