Dynamics of organic C in black soil of Northeast China,simulated by CENTURY model I.Accumulation of soil organic carbon under natural conditions

Abstract

Abstract: By using CENTURY model,this paper simulated the dynamics of organic carbon and its fractions,including active,slow and passive pools,in black soils under natural condition at Nenjiang,Beian,Hailun and Harbin in Heilongjiang Province and at Gongzhuling in Jilin Province.The results showed that soil organic carbon had increased for a long time,and tended to reach the steady state.In the steady state,soil organic carbon reached 7914.72～11672.78 g·m^-2,which decreased from north to south in general.The active,slow and passive fractions were 3 36%～4.62%、50.54%～55.47% and 36.47%～41.95% of soil organic carbon pool,respectively,which indicated that slow and passive fraction were the main body of soil organic carbon in native ecosystem.The simulated results were in agreement with some observed results,which can be used as the original data in the study on the dynamics of soil organic matter after cultivation.

Key words: Black soil, Soil organic carbon, Simulation

CLC Number:

S153

GAO Lupeng, LIANG Wenju, JIANG Yong, WEN Dazhong. Dynamics of organic C in black soil of Northeast China,simulated by CENTURY model I.Accumulation of soil organic carbon under natural conditions[J]. Chinese Journal of Applied Ecology, 2004, (5): 772-776.

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