Topographic variation of soil nitrogen mineralization and microbial biomass in Japanese cedar (Cryptomeria japonicaD. Don) stands at Myougodani watershed, Toyama, Japan

Autor:	Kotaro Zushi
Rok vydání:	2003
Předmět:	Watershed biology Ecology Soil Science Cryptomeria Soil science Plant Science Soil carbon biology.organism_classification complex mixtures Japonica Soil water Environmental science Nitrification Spatial variability Nitrogen cycle
Zdroj:	Soil Science and Plant Nutrition. 49:843-851
ISSN:	1747-0765 0038-0768
DOI:	10.1080/00380768.2003.10410346
Popis:	The spatial variability of nitrogen (N) mineralization, nitrification, and microbial biomass was investigated using surface soils from various topographic positions at a relatively small watershed with Japanese cedar (Crgptomeria japonica D. Don) plantations. The watershed topography was characterized using a topographic index derived from GIS analysis. The topographic index reasonably reflected the spatial variability of the soil water conditions, total soil carbon (C) and N contents, and exchangeable base concentrations. However, this index was not significantly correlated with the spatial variability of net N mineralization and microbial biomass. Topographic index and soil properties (total soil C and N contents, C / N ratio, exchangeable base concentrations, and clay content) were subjected to principal component analysis to eliminate multiple-collinearity among the variables, and express the variables as new orthogonal variables. Principal component analysis showed that the soil properties c...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dd5e741b750c8688349606059ac022a0 https://doi.org/10.1080/00380768.2003.10410346 Zobrazit plný text záznamu