中国东部南北样带森林生态系统102个优势种叶片碳氮磷化学计量学统计特征  

Stoichiometric characteristics of leaf carbon,nitrogen,and phosphorus of 102 dominant species in forest ecosystems along the North-South Transect of East China

作　　者：任书杰[1] 于贵瑞[1] 姜春明[1,2] 方华军[1] 孙晓敏[1] 

机构地区：[1]中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,CERN综合研究中心,北京100101 [2]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《应用生态学报》2012年第3期581-586,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30590380,31000211);国家重点基础研究发展计划项目(2010CB833504);中国科学院战略性先导科技专项(XDA05050601)资助

摘　　要：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.One hundred and twelve sampling sites in the forest ecosystems along the North-South Transect of Eastern China（NSTEC） were selected to study the stoichiometric characteristics and variability of leaf carbon（C）,nitrogen（N）,and phosphorous（P） of 102 dominant species.The contents of leaf C（Cmass）,leaf N（Nmass）,and leaf P（Pmass） ranged in 374.1-646.5 mg·g-1,8.4-30.5 mg·g-1,and 0.6-6.2 mg·g-1,with the arithmetic mean（AM） being 480.1,18.3 and 2.0 mg·g-1,and the variation coefficient（CV） being 11.1%,27.5%,and 56.4%,respectively.The leaf C/N,C/P and N/P ranged from 14.1 to 64.1,from 70.9 to 838.6,and from 1.5 to 21.2,with the AM being 29.1,313.9 and 11.5,and the CV being 32.8%,48.3% and 44.1%,respectively.The mass ratio of C：N：P was 313.9：11.5：1,and the atom ratio was 810.9：25.4：1.As compared with those at global scale,the tree leaf Cmass and C/N in the study area were significantly higher,Nmass and N/P were significantly lower,while Pmass and C/P had less differences.

关 键 词：中国东部南北样带 森林 Redfield比例 叶片养分 生态化学计量学 

分 类 号：S718.5[农业科学—林学]