【摘要】 根据第 2代杉木人工林小集水区径流场定位观测的数据资料 ,利用分室法建立生物地球化学循环的数学模型 ,并对 15 %和 30 %两种间伐强度的模拟结果进行了分析 .结果表明 ,第 2代杉木林生态系统中除土壤分室外 ,其余各分室养分的贮存量呈逐年增加的趋势 ;与对照相比 ,两种经营措施对地下部分养分库影响不大 ,对地上部分养分库影响较大 .15 %和 30 %的强度间伐后 ,生态系统内地上部分养分积累量恢复到间伐前的水平 ,分别需要 6a和 9a的时间 .更多还原

【Abstract】 Based on nutrient cycling of the second generation of Chinese fir plantation at fast-growing stage,the model of biogeochemical cycles was established by using compartment.Simulation results showed that the storage of N,P,K,Ca and Mg in each compartment increase significantly except the soil compartment by using two methods.The nutrient elements accumulation above ground compartment needs 6 years and 9 years to restore to the state before thinning when the intensity of thinning are 15% and 30%.更多还原