水土保持学报2013，Vol.27Issue(2)：234-237,266,5.
典型农耕区棕壤水稳性团聚体及其有机碳特征
Characterization of Water Stable Aggregates and Organic Carbon in Typical Brown Arable Soil
摘要
Abstract
This paper was aimed at the distribution and composition of water stable aggregates together with organic carbons in brown soil in Shandong peninsula. The results showed that; The size distribution of water stable aggregates was as irregular "W" with two lower "shoulders". The microaggregates (< 250 μm) accounted for 51. 74% in arable soil and 51. 61% in uncultivated soil, respectively. The dispersion degree of soil particles was increased due to the cultivation disturbance and the smaller aggregates resisted the water erosion. The distribution of soil organic carbon(SOC) in soil predominately was constrained by the allocation of aggregates, which was increased with the decreasing of particle sizes. The average content of SOC in macroaggregates was 5. 98 g/kg in arable soil and 3. 48 g/kg in uncultivated soil, respectively. The content was 8. 05 g/kg for arable soil and 9. 11 g/kg for uncultivated soil in microaggregates, accounting for 55. 36% and 68. 58% of the total organic carbon content in soil, respectively. It was notable that the content of SOC in silt-clay microaggregates(<20 μm) was the highest(10. 97 g/kg and 11. 63 g/kg in arable and uncultivated soil, respectively), which could be regarded as the indicator for potential of SOC sequestration of brown soil in study areas. Fourier transform infrared spectroscopy (FTIR) resolve showed that organic carbon in microaggregates predominately consisted of stable aromatic and carbohydrate carbon.关键词
棕壤/水稳性团聚体/有机碳/傅立叶变换红外光谱(FTIR)Key words
brown soil/ water stable aggregate/ soil organic carbon/ Fourier transform infrared spectroscopy (FTIR)分类
农业科技引用本文复制引用
任雅阁,成杭新,徐殿斗,刘应汉,刘飞,欧阳宏,刘志明,马玲玲..典型农耕区棕壤水稳性团聚体及其有机碳特征[J].水土保持学报,2013,27(2):234-237,266,5.基金项目
国土资源部行业基金项目(200911020) （200911020）
中国地质调查局专项(1212011087123) （1212011087123）
