Spatial variability of soil nitrogen transformation patterns along a forest slope in a Cryptomeria japonica D. Don plantation

Muneto Hirobe, Naoko Tokuchi, Goro Iwatsubo

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

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 languageEnglish
Pages (from-to)123-131
Number of pages9
JournalEuropean Journal of Soil Biology
Volume34
Issue number3
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes

Keywords

  • N mineralization
  • Nitrification
  • Percent nitrification
  • Slope
  • Spatial variability

ASJC Scopus subject areas

  • Microbiology
  • Soil Science
  • Insect Science

Fingerprint Dive into the research topics of 'Spatial variability of soil nitrogen transformation patterns along a forest slope in a Cryptomeria japonica D. Don plantation'. Together they form a unique fingerprint.

Cite this