HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Bergsma, T. T. Articles by Ostrom, N. E. Search for Related Content PubMed PubMed Citation Articles by Bergsma, T. T. Articles by Ostrom, N. E. GeoRef GeoRef Citation Agricola Articles by Bergsma, T. T. Articles by Ostrom, N. E. Related Collections Soil Microbiology Air Pollution Soil History Isotopes Nitrogen

TECHNICAL REPORTS
Atmospheric Pollutants and Trace Gases

Influence of Soil Moisture and Land Use History on Denitrification End-Products

^a W.K. Kellogg Biological Station and Dep. of Crop and Soil Sciences, Michigan State Univ., 3700 E. Gull Lake Drive, Hickory Corners, MI 49060
^b Dep. of Geological Sciences, 206 Natural Science Building, Michigan State University, East Lansing, MI 48823

* Corresponding author (tbergsma{at}kbs.msu.edu)

Received for publication April 23, 2001. We investigated the effects of recent moisture history on the relative production of N₂O and N₂ during denitrification in soil from cropped and successional ecosystems. The soils were pedogenically identical but had been managed differently for the past decade. Sieved soils were amended with nitrate, glucose, and water. Long-wet and short-wet incubations received 80 and 0%, respectively, of prescribed water 2 d before incubation and the rest just before incubation. The N₂O and N₂ production and N₂O mole fraction (N₂O/[N₂O + N₂]) were measured using acetylene inhibition. The N₂ production and soil ¹⁵N enrichment were measured by ¹⁵N-gas evolution. The response of N₂O mole fraction to moisture history differed by ecosystem. Mean N₂O mole fraction in the successional system was about the same for long-wet and short-wet treatments (0.34 and 0.33, respectively). For the cropped system, however, the N₂O mole fraction was 0.36 for the long-wet and 0.90 for the short-wet treatment. Thus, in the cropped system a much smaller proportion of end product was N₂O if soil had been wet for 2 d. For N₂ fluxes, the isotope method gave the same pattern (r = 0.92) but only about one-third the magnitude, suggesting that N₂ derived from two distinct pools. Differences in response of N₂O mole fraction for successional and cropped soils may be due to differences in microbial communities. Further knowledge of ecosystem differences with respect to N₂O mole fraction and recent moisture history may improve modeled estimates of local and global N₂O fluxes.

Abbreviations: BD, bulk density • NOS, nitrous oxide reductase • WFPS, water-filled pore space

This article has been cited by other articles:

				P. Rochette, D. A. Angers, M. H. Chantigny, N. Bertrand, and D. Cote Carbon Dioxide and Nitrous Oxide Emissions following Fall and Spring Applications of Pig Slurry to an Agricultural Soil Soil Sci. Soc. Am. J., July 1, 2004; 68(4): 1410 - 1420. [Abstract] [Full Text] [PDF]

				B. Stres, I. Mahne, G. Avgustin, and J. M. Tiedje Nitrous Oxide Reductase (nosZ) Gene Fragments Differ between Native and Cultivated Michigan Soils Appl. Envir. Microbiol., January 1, 2004; 70(1): 301 - 309. [Abstract] [Full Text] [PDF]