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.
| Original language | English |
|---|---|
| Pages (from-to) | 2129-2135 |
| Number of pages | 7 |
| Journal | Communications in Soil Science and Plant Analysis |
| Volume | 36 |
| Issue number | 15-16 |
| DOIs | |
| Publication status | Published - 2005 Sep 5 |
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All Science Journal Classification (ASJC) codes
- Soil Science
- Agronomy and Crop Science
- Plant Science
- Analytical Chemistry
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Inhibition of extracellular enzyme activities in a forest soil by additions of inorganic nitrogen. / Kang, Hojeong; Lee, Dowon.
In: Communications in Soil Science and Plant Analysis, Vol. 36, No. 15-16, 05.09.2005, p. 2129-2135.Research output: Contribution to journal › Article
TY - JOUR
T1 - Inhibition of extracellular enzyme activities in a forest soil by additions of inorganic nitrogen
AU - Kang, Hojeong
AU - Lee, Dowon
PY - 2005/9/5
Y1 - 2005/9/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=23944454827&partnerID=8YFLogxK
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U2 - 10.1080/00103620500194650
DO - 10.1080/00103620500194650
M3 - Article
VL - 36
SP - 2129
EP - 2135
JO - Communications in Soil Science and Plant Analysis
JF - Communications in Soil Science and Plant Analysis
SN - 0010-3624
IS - 15-16
ER -