Effects of Topography and Land Use on Spatial Distribution of Soil Inorganic Carbon in a Small Watershed of the Loess Hilly-gully Region
It is significant to accurately assess regional spatial distribution characteristics and influencing factors of soil inorganic carbon and to study effects of land use and topographies on spatial distribution of soil inorganic carbon. Taking Zhifanggou small watershed, which is situated in loess hilly-gully region, as an object, influences of land use and topographic on the distribution of inorganic carbon on 0--200 cm soil layer were studied. Results showed that the terrain had a significant influence on the spatial distribution of soil inorganic carbon on Zhifanggou small watershed, and ranged as： Table land（15.32 g/kg） 〉slope land（14.45 g/kg） 〉gully land（12.27 g/kg）. There were differences in the distribution of soil inorganic carbon under different land use. Soil inorganic carbon content in shrub land were significantly higher than those in wood land, grassland and farmland, wood land and grassland significantly higher than those in farmland. But there were no significant difference between wood land and grassland, and soil inorganic carbon content under different land use could be ordered as follows： Shrub land 〉grassland 〉woodland 〉farmland〉 interaction of topographic position and land use significantly affected the spatial distribution of soil inorganic carbon（P〈 0.01）. The result can provide basic information for soil carbon pool of the Loess Plateau, it is helpful to know that the Loess Plateau which is important to carbon cycle of terrestrial ecosystems of China.
loess hilly-gully region land use topography soil inorganic carbon(SIC)
国家科技期刊平台
NSTL
万方数据
维普
