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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
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
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.
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DOI
10.1080/00103620500194650
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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