In this work, SLA( specific leaf area) , SLM( specific leaf mass) , LDMC( leaf dry matter content) and their relationships at 5, 10, 15, 20, 25 standing ages of Chinese fir Cunninghamia lanceolata were investigated by ANOVA, Pearson correlation coefficient comparisons and regression analyses in order to understand the rule of leaf dry matter investment and repayment. Our results show the following conclusions.(1)The fir with the standing age of 5 and 20 years is progressive in investment return and that of the standing age of 10 and 15 years is relatively conservative. (2) The expected leaf re...
