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Title: Soil nitrogen dynamics during stand development after clear-cutting of Japanese cedar (Cryptomeria japonica) plantations
Authors: Fukushima, Keitaro
Tateno, Ryunosuke  kyouindb  KAKEN_id  orcid (unconfirmed)
Tokuchi, Naoko  kyouindb  KAKEN_id
Author's alias: 福島, 慶太郎
Keywords: Biomass productivity
Internal nitrogen cycling
Japanese cedar plantations
Soil nitrogen availability
Stand development
Issue Date: Oct-2011
Publisher: The Japanese Forest Society and Springer
Journal title: Journal of Forest Research
Volume: 16
Issue: 5
Start page: 394
End page: 404
Abstract: We examined soil N dynamics, including inorganic N concentration, net N transformation rates, and estimated plant N uptake (EPNU) from soil N budgets, and litterfall inputs, in five Japanese cedar plantation stands of different ages (5, 16, 31, 42, and 89 years) in the Mt Gomadan Experimental Forest (GEF). Net soil N mineralization and nitrification rates did not differ significantly between the youngest and oldest stands; soil moisture and inorganic N concentration were higher in the youngest stand. The EPNU was highest in the 16-year-old stand and lowest in the 31-year-old stand, and had a significant negative correlation with litter C:N ratio. The oldest (89-year-old) stand had a higher soil C:N ratio, lower proportion of nitrification rate to mineralization rate (%NIT), and higher estimated plant NH4 + uptake than did the other stands, indicating that changes of soil organic matter quality can alter soil N dynamics. These results suggest that as a Japanese cedar plantation develops, soil N dynamics can be altered by the quantity and quality of input litter and soil organic matter, and can generate the imbalance between N supply from soil and N demand by plant.
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This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1007/s10310-011-0286-1
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