Skip to Main Content
Comparison of Available Soil Nitrogen Assays in Control and Burned Forested SitesAuthor(s): Jennifer D. Knoepp; Wayne T. Swank
Source: Soil Science Society of America Journal Volume 59, no.6, November-December 1995. 5p.
Publication Series: Miscellaneous Publication
PDF: Download Publication (167 KB)
DescriptionThe existence of several different methods for measuring net Nmineralization and nitrilkation rates and indexing N availability has raised questions about the comparability of these methods. We compared in situ covered cores, in situ buried bags, aerobic laboratory incubations, and tension lysimetry on control and treated plots of a prescribed burn experiment in the southern Appalachians. Environmental influences were examined with soil moisture and temperature measurements. All methods detected significant differences in net N mineralization rates between treated and control plots; P = 0.04, 0.007,0.001, and 0.07 for covered cores, buried bags, lab incubations, and lysimeters, respectively. Mean rates of N mineralization during the growing season were similar for the three soil incubation methods. The laboratory incubation of soil from treated plots produced significantly greater potential nitrification rates than the in situ methods. The four methods were not well correlated; this indicates the need for caution when comparing N transformation data derived from different methods. We conclude that the in situ covered core method is superior because it best incorporates site-specific soil temperature and moisture changes into N transformation measurements. 1990; Hart and Firestone, 1989; Hill and Shackleton, 1989). However, these comparisons were limited by the number of methods tested or by the sites on which they were tested.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKnoepp, Jennifer D.; Swank, Wayne T. 1995. Comparison of Available Soil Nitrogen Assays in Control and Burned Forested Sites. Soil Science Society of America Journal Volume 59, no.6, November-December 1995. 5p.
- Using soil temperature and moisture to predict forest soil nitrogen mineralization
- Regulation of nitrogen mineralization and nitrification in Southern Appalachian ecosystems: separating the relative importance of biotic vs. abiotic controls
- Nitrogen (N) Dynamics in the Mineral Soil of a Central Appalachian Hardwood Forest During a Quarter Century of Whole-Watershed N Additions
XML: View XML