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选择中国东部南北样带森林生态系统112个采样点,研究了102个优势植物叶片的有机碳、全氮和全磷化学计量学特征及其变异性.结果表明:在中国东部南北样带森林生态系统中,优势植物叶片的有机碳含量(Cmass)、全氮含量(Nmass)和全磷含量(Pmass)的变化范围分别为374.1～646.5 mg.g-1、8.4～30.5 mg.g-1和0.6～6.2 mg.g-1,算术平均数分别为480.1、18.3和2.0 mg.g-1,变异系数分别为11.1%、27.5%和56.4%;C/N、C/P和N/P的变化范围分别为14.1～64.1、70.9～838.6和1.5～21.2,算术平均数分别为29.1、313.9和11.5,变异系数分别为32.8%、48.3%和44.1%.C∶N∶P质量比为313.9∶11.5∶1,摩尔比为810.9∶25.4∶1.与全球尺度的研究结果相比,本研究区域树木叶片Cmass和C/N明显偏高,叶片Nmasss和N/P明显偏低,而叶片Pmass和C/P差异不显著.
112 sampling sites of forest ecosystems in the north-south transects of eastern China were selected to study the stomatal characteristics of carbon, total nitrogen and total phosphorus in 102 dominant plants and their variability.The results showed that in the forest ecosystems of the north-south transects of eastern China, In the system, the ranges of Cmass, Nmass and Pmass of dominant plants were 374.1-646.5 mg.g-1,8.4-30.5 mg.g-1 and 0.6 ~ 6.2 mg.g-1, and the arithmetic mean values were 480.1, 18.3 and 2.0 mg.g-1 respectively, with the coefficients of variation of 11.1%, 27.5% and 56.4%, respectively. The C / N, C / P and N / P The variation ranges were 14.1-64.1,70.9-838.6 and 1.5-21.2 respectively, the arithmetic mean values were 29.1, 313.9 and 11.5 respectively, and the coefficients of variation were 32.8%, 48.3% and 44.1%, respectively, and the mass ratio of C: N: P was 313.9: 11.5:1, molar ratio of 810.9:25.4:1.Compared with the results from the global scale, the Cmass and C / N of the leaves in the study area were significantly higher, Nmasss and N / P of the leaves were significantly lower, while Pmass and C / P difference is not significant.