中国植物细根碳、氮、磷化学计量学的空间变化及其影响因子

马玉珠, 钟全林, 靳冰洁, 卢宏典, 郭炳桥, 郑媛, 李曼, 程栋梁

Spatial changes and influencing factors of fine root carbon, nitrogen and phosphorus stoichiometry of plants in China

MA Yu-Zhu,ZHONG Quan-Lin,JIN Bing-Jie,LU Hong-Dian,GUO Bing-Qiao,ZHENG Yuan,LI Man,CHENG Dong-Liang

表2 根系碳(C)、氮(N)、磷(P)含量及其计量比的纬度变化模式

Table 2 Latitudinal patterns of carbon (C), nitrogen (N) and phosphorus (P) contents and their ratios in roots

因变量 Dependent variable 截距 Intercept 斜率 Slope R2 p n 细根 Fine root C 1.74 -0.002 0.102 0.070 33 N -0.36 0.009 0.133 <0.001 146 P -1.54 0.013 0.097 <0.001 123 N:P 1.21 -0.005 0.016 0.161 123 C:N 2.20 -0.015 0.259 0.003 33 C:P 2.95 -0.009 0.085 0.256 17 粗根 Coarse root C 1.71 -0.002 0.099 0.015 59 N -0.21 -0.003 0.006 0.316 182 P -1.45 0.005 0.020 0.084 149 N:P 1.37 -0.012 0.095 <0.001 149 C:N 2.13 -0.004 0.015 0.373 55 C:P 2.89 0.001 0.001 0.863 41 细根+粗根 Fine root + coarse root C 1.71 -0.002 0.081 0.006 92 N -0.29 0.003 0.008 0.101 328 P -1.50 0.009 0.051 <0.001 272 N:P 1.29 -0.008 0.047 <0.001 272 C:N 2.26 -0.012 0.097 0.003 88 C:P 3.04 -0.007 0.034 0.167 58