Spatiotemporal variations of soil physical property and nutrient in Cunninghamia lanceolata stands with different slope positions
The study on temporal and spatial variations of soil physical property and nutrient was conducted in Cunninghamia lanceolata stands with different slope positions in 2004 and 2007.Compared with those in 2004,the soil buck density decreased in the upper-slope and slightly increased in the middle-slope and lower-slope; capillary porosity increased and natural water content significantly increased in the three slope; non-capillary porosity,total porosity and capillary moisture increased in the upper-slope and lower-slope and decreased in the middie-slope.There were no significant difference in soil physical property among the three slopes,except for non-capillary porosity in 2004 and capillary moisture in 2007.Compared with those in 2004,the pH value of the three slopes was almost not changed,whereas contents of the soil organic matter,total N,total P,total K,hydrolyzable N,available P and available K significantly increased in 2007; the pH value of the three slopes was closed to each other,whereas soil organic matter,total N,total P,total K and hydrolyzable N in the lower-slope and middle-slope were greater than those in the upper-slope in 2004 and 2007.The contents of available P of the three slopes were closed to each other in 2004 and was ordered by the lower-slope＞the upper-slope ＞ the middle-slope in 2007.Available K was ranked in order of the upper-slope ＞ the middle-slope ＞ the lower-slope in 2004,while it was greater in the lower-slope and middle-slope than in the upper-slope in 2007.There were significant differences in soil organic matter and most nutrients among the three slopes.
国家科技期刊平台
NSTL
万方数据
维普
