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Inhibition of extracellular enzyme activities in a forest soil by additions of inorganic nitrogen

Title
Inhibition of extracellular enzyme activities in a forest soil by additions of inorganic nitrogen
Authors
Kang H.Lee D.
Ewha Authors
강호정
SCOPUS Author ID
강호정scopus
Issue Date
2005
Journal Title
Communications in Soil Science and Plant Analysis
ISSN
0010-3624JCR Link
Citation
Communications in Soil Science and Plant Analysis vol. 36, no. 15-16, pp. 2129 - 2135
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Forest ecosystems are known to be nitrogen (N) limited, and productivity often increases with N additions. However, recent studies have suggested that additions of excessive N through atmospheric deposition may affect soil processes adversely. In this study, we conducted a laboratory-based manipulation experiment to reveal the effects of N additions on extracellular enzyme activities in a temperate forest soil. Three different levels of N additions (water-only control, low N addition, and high N addition) were applied to soil columns (2.5-cm diameter x 12 cm height) over 4 weeks. Overall, the additions of N decreased specific activities (enzyme activity per log bacterial cell number) of urease, glutaminase, phosphatase, and arylsulfatase significantly. However, dehydrogenase activity was increased with the high N addition. The results suggest that N deposition may impede nutrient cycling, particularly mineralization of organic nutrients. In addition, this enzyme inhibition may be one of the mechanisms for N retention observed in forest floors. Copyright © Taylor & Francis, Inc.
DOI
10.1080/00103620500194650
Appears in Collections:
공과대학 > 환경공학과 > Journal papers
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