The study on changes of soil fertilities was conducted in Michelia macclurei stands with different slope positions in 2004 and 2007.Compared with those in 2004

no significant changes in the soil density

capillary porosity

non-capillary porosity

total porosity and capillary moisture were observed in the upper-slope

middle-slope and lower-slope

whereas the natural water significantly increased in 2007.The pH value of the three positions decreased slightly

the contents of soil organic matter

total N and total K significantly increased

whereas total P content decreased in the three positions.The contents of soil hydrolyzable N and available P in the three positions and available K of the middle-slope and lower-slope significantly increased

and K of the upper-slope increased slightly.Soil physical properties changed with a non-regular pattern.The pH value and available P content of the three slopes were close to each other

the contents of soil organic matter

total N and total P were lower-slopemiddle-slopeupper-slope in 2004 and 2007.The content of soil hydrolyzable N of middle-slope and lower-slope was greater than that of upper-slope

and available K content of the upper-slope

middle-slope was smaller than that of the lower-slope in 2004

whereas it was lower-slopemiddle-slopeupper-slope in 2007.