https://scholars.lib.ntu.edu.tw/handle/123456789/461230
標題: | Effects of fire and vegetation types on soil temperature and chemistry at Chihsing Mountain, Taiwan | 作者: | Wang C.-P. Liu M.-C. Lin K.-C. Wang L.-J. LIH-JIH WANG |
關鍵字: | Dwarf-bamboo; Fire; Grassland; Natural forest; Soil chemistry; Soil temperature | 公開日期: | 2003 | 卷: | 18 | 期: | 1 | 起(迄)頁: | 43-54 | 來源出版物: | Taiwan Journal of Forest Science | 摘要: | A grassland (Miscanthus floridulus (Labill.) Warb) at Chihsing Mountain, northern Taiwan, was burned in July 2001. Soil temperature at 5-cm depth of burned (burned grassland) and undisturbed (grassland and natural forest) sites was monitored. Soil chemical properties of the burned grassland, grassland, natural forest, and dwarf-bamboo (Pseudosassa usawai) sites were analyzed to reveal the effects of fire and vegetation types on soil chemistry. The variation of daily temperature in soil of the burned grassland was 6°C, which was 4.5°C higher than that under a natural forest. However, this phenomenon disappeared within 4 mon due to fast regeneration of the grass. Increases in concentrations of nutrients arising from the additions of fine ash at the burned grassland were not observed in this study. Contrarily, burning increased the soil bulk density of the grassland and decreased the soil pH value, SOM, concentrations of exchangeable cations, CEC, and base saturation. Exposure of soils after fire in this steep area with abundant precipitation may lead to serious soil erosion and nutrient loss. Significant decreases in soil carbon and nitrogen contents were also found in the burned grassland. Determination of the loss of soil C and N caused by intensified mineralization of the organic matter needs further study. Soils from the study sites show the typical characteristics of an Andisol, being strongly acidic, with fewer exchangeable cations, a low base saturation (<3%), and an accumulation of soil organic matter with Al-compounds which are recalcitrant to decomposition. Therefore, the effects of vegetation types (grassland and natural forest) on the contents of SOM, TC, TN, and CEC were not significant. Since bamboo shoots are collected by local people, nutrients may be continuously removed from the site with bamboo resulting in lower concentrations of exchangeable cations, CEC, and SOM compared to the undisturbed grassland and natural forest. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/461230 | ISSN: | 10264469 | SDG/關鍵字: | Bamboo; Fires; pH effects; Precipitation (meteorology); Soils; Dwarf-bamboos; Vegetation; Bamboo; Forest Fires; Grass Lands; Plants; Precipitation; Bambusa; Fraxinus; Miscanthus; Miscanthus floridulus |
顯示於: | 森林環境暨資源學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。