Field Temperature Dominantly Affected Soil Organic Carbon Stability along an Altitudinal Gradient in Changbai Mountain, Northeast China

摘要：

　　An improved understanding of how soil organic carbon (SOC) stability varied with temperature and forest type was required to evaluate the global warming effects on SOC dynamics and the potential feedback of forest ecosystems to the climate change.Here,SOC stability along an altitudinal gradient in Cbangbai Mountain was investigated with a 180-day incubation experiment at the field temperature of 15 ℃.Soil respirations were determined dynamically to quantify the decomposition rate and the stability of SOC.The respiration rate declined at the first 30 days and became relatively constant within the latter days.After fitting two-pool C decomposition model,the rate constant of stable C pool increased with the increase of mean growing season temperature except soil from Picea and Abies forest which had weaker physical protection than other soils.In conclusion,SOC stability increased with mean growing season temperature,while forest type had little effect on SOC stability.

关键词： Altitudinal gradient Soil organic carbon stability Temperature

作者: Q.X.Tian H.B.He X.D.Zhang

作者单位: State Key Laboratory of Forest and Soil Ecology,Institute of Applied Ecology,Chinese Academy of Scie State Key Laboratory of Forest and Soil Ecology,Institute of Applied Ecology,Chinese Academy of Scie

会议类型: 国际会议

会议名称: the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))

会议地点: 杭州

会议语种:英文

页码: 212-214

在线出版日期: 2012-09-09（万方平台首次上网日期，不代表论文的发表时间）