Abstract
Spatial variability of soil nitrogen (N) transformation patterns was investigated along a slope of a Cryptomeria japonica plantation. The controlling factors of the soil N transformation patterns were examined by multivariate analysis. Net N mineralization showed no clear gradient along the slope, while net nitrification and percent nitrification were high in the lower part, and very low in the upper part of the slope. The middle part was the transition zone corresponding to the patchiness of the lower and upper soils. Soil properties (e.g. C/N ratio and pH) except total N significantly correlated with slope position. Principal component (PC) analysis showed soil properties to be divided into three groups which were PC1 (water content and extractable organic C and N), PC2 (C/N ratio and pH), and PC3 (total C and N). Regressions of soil N transformation pattern against PCs scores suggested that net N mineralization was mainly regulated by PC3, while net nitrification and percent nitrification were mainly regulated by PC1 and PC2. The scatter plots of percent nitrification and the first two PCs scores suggest that PC2 regulates the potentiality, and PC1 affects specially in the middle of the slope where the effect of PC2 was moderate.
| Original language | English |
|---|---|
| Pages (from-to) | 123-131 |
| Number of pages | 9 |
| Journal | European Journal of Soil Biology |
| Volume | 34 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
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Keywords
- N mineralization
- Nitrification
- Percent nitrification
- Slope
- Spatial variability
ASJC Scopus subject areas
- Soil Science
- Ecology
Cite this
Spatial variability of soil nitrogen transformation patterns along a forest slope in a Cryptomeria japonica D. Don plantation. / Hirobe, Muneto; Tokuchi, Naoko; Iwatsubo, Goro.
In: European Journal of Soil Biology, Vol. 34, No. 3, 1999, p. 123-131.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spatial variability of soil nitrogen transformation patterns along a forest slope in a Cryptomeria japonica D. Don plantation
AU - Hirobe, Muneto
AU - Tokuchi, Naoko
AU - Iwatsubo, Goro
PY - 1999
Y1 - 1999
N2 - Spatial variability of soil nitrogen (N) transformation patterns was investigated along a slope of a Cryptomeria japonica plantation. The controlling factors of the soil N transformation patterns were examined by multivariate analysis. Net N mineralization showed no clear gradient along the slope, while net nitrification and percent nitrification were high in the lower part, and very low in the upper part of the slope. The middle part was the transition zone corresponding to the patchiness of the lower and upper soils. Soil properties (e.g. C/N ratio and pH) except total N significantly correlated with slope position. Principal component (PC) analysis showed soil properties to be divided into three groups which were PC1 (water content and extractable organic C and N), PC2 (C/N ratio and pH), and PC3 (total C and N). Regressions of soil N transformation pattern against PCs scores suggested that net N mineralization was mainly regulated by PC3, while net nitrification and percent nitrification were mainly regulated by PC1 and PC2. The scatter plots of percent nitrification and the first two PCs scores suggest that PC2 regulates the potentiality, and PC1 affects specially in the middle of the slope where the effect of PC2 was moderate.
AB - Spatial variability of soil nitrogen (N) transformation patterns was investigated along a slope of a Cryptomeria japonica plantation. The controlling factors of the soil N transformation patterns were examined by multivariate analysis. Net N mineralization showed no clear gradient along the slope, while net nitrification and percent nitrification were high in the lower part, and very low in the upper part of the slope. The middle part was the transition zone corresponding to the patchiness of the lower and upper soils. Soil properties (e.g. C/N ratio and pH) except total N significantly correlated with slope position. Principal component (PC) analysis showed soil properties to be divided into three groups which were PC1 (water content and extractable organic C and N), PC2 (C/N ratio and pH), and PC3 (total C and N). Regressions of soil N transformation pattern against PCs scores suggested that net N mineralization was mainly regulated by PC3, while net nitrification and percent nitrification were mainly regulated by PC1 and PC2. The scatter plots of percent nitrification and the first two PCs scores suggest that PC2 regulates the potentiality, and PC1 affects specially in the middle of the slope where the effect of PC2 was moderate.
KW - N mineralization
KW - Nitrification
KW - Percent nitrification
KW - Slope
KW - Spatial variability
UR - http://www.scopus.com/inward/record.url?scp=0032109041&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032109041&partnerID=8YFLogxK
U2 - 10.1016/S1164-5563(00)88649-5
DO - 10.1016/S1164-5563(00)88649-5
M3 - Article
AN - SCOPUS:0032109041
VL - 34
SP - 123
EP - 131
JO - European Journal of Soil Biology
JF - European Journal of Soil Biology
SN - 1164-5563
IS - 3
ER -