- 期刊
雲林四湖低濕海岸林地土壤特性
Characteristics of Lowland Coastal Forest Soil at Szehu, Yunling
摘要
The pedon description, and the characteristics of soil organic matter composition with nutrient contents in each layer of lowland coastal forest at Szehu, Yunling County was analyzed. The sampling pedon at Szehu was classified as a sandy immature soil by the silicated lithic contact, which was taxonomied by Haplic Arenosol (FAO) or Typic Udipsamment (USDA). The soil pH of surface layer was lower than that of deeper horizons, which was due to the abundance of fulvic and humic acids that were rapidly decomposed by the soil organic matters in the surface layer, and lower deposits of organic carbon by deeper sandy soils, which caused relatively high eluviation in the soil profile. The soil water soluble organic carbon, microbial biomass carbon, organic carbon and total nitrogen contents mainly accumulated in the surface layer, decreased rapidly when soil depth was deeper than 5 cm in the soil profile. Exchangeable potassium, calcium and magnesium were shown the highest at the surface layer, but exchangeable calcium obviously higher than the others in each layer. The exchangeable sodium was abundance of soil layer deeper than 50 cm. Especially the base saturation was extremely high when soil layer was deeper than 25 cm, which was caused by highly exchangeable calcium. From statistical analysis, water soluble organic, microbial biomass, and organic carbon contents were shown significant different at 1% level in Szehu site. There is a linear relationship among the different form of carbon element in the organic matter of sandy soil (R^2 ≥ 0.833 and p ＜ 0.05).
並列摘要
The pedon description, and the characteristics of soil organic matter composition with nutrient contents in each layer of lowland coastal forest at Szehu, Yunling County was analyzed. The sampling pedon at Szehu was classified as a sandy immature soil by the silicated lithic contact, which was taxonomied by Haplic Arenosol (FAO) or Typic Udipsamment (USDA). The soil pH of surface layer was lower than that of deeper horizons, which was due to the abundance of fulvic and humic acids that were rapidly decomposed by the soil organic matters in the surface layer, and lower deposits of organic carbon by deeper sandy soils, which caused relatively high eluviation in the soil profile. The soil water soluble organic carbon, microbial biomass carbon, organic carbon and total nitrogen contents mainly accumulated in the surface layer, decreased rapidly when soil depth was deeper than 5 cm in the soil profile. Exchangeable potassium, calcium and magnesium were shown the highest at the surface layer, but exchangeable calcium obviously higher than the others in each layer. The exchangeable sodium was abundance of soil layer deeper than 50 cm. Especially the base saturation was extremely high when soil layer was deeper than 25 cm, which was caused by highly exchangeable calcium. From statistical analysis, water soluble organic, microbial biomass, and organic carbon contents were shown significant different at 1% level in Szehu site. There is a linear relationship among the different form of carbon element in the organic matter of sandy soil (R^2 ≥ 0.833 and p ＜ 0.05).