Causes of Delayed Nitrate Production in Two Indiana Forests

Authors: Vitousek, Peter M.; Matson, Pamela A.

Source: Forest Science, Volume 31, Number 1, 1 March 1985 , pp. 122-131(10)

Publisher: Society of American Foresters

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An oak and a pine forest site in southern Indiana had elevated soil ammonium concentrations after an experimental disturbance but delayed nitrate production and loss. The causes of these delays were evaluated using laboratory experiments with amended soils. Neither added ammonium nor a combination of all other essential nutrients reduced the delays, but raising soil pH increased net nitrogen mineralization in both sites and nitrate production in the oak site. Adding an inoculum containing active nitrifying bacteria increased nitrate production in the pine forest floor. We concluded that the interaction of low soil pH and perhaps labile inhibitors of nitrification caused delayed nitrification in the oak site, while low initial populations of nitrifying bacteria caused delays in the pine site. Forest Sci. 31:122-131.

Keywords: Oak forest; pine forest

Document Type: Journal Article

Affiliations: Forest Entomology, North Carolina State University, Raleigh, NC 27650, is currently at NASA--Ames Research Center, LX 239-12, Moffett Field, CA 94035

Publication date: March 1, 1985

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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