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3 根系碳(C)、氮(N)、磷(P)含量及其计量比的经度变化模式

Table 3 Longitudinal 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 1.76 -0.000 7 0.024 0.386 33 N -0.60 0.004 5 0.028 0.042 146 P 0.35 -0.013 0 0.059 0.007 123 N:P -0.46 0.013 4 0.078 0.002 123 C:N 2.44 -0.006 3 0.098 0.075 33 C:P 2.15 0.004 7 0.037 0.462 17 粗根 Coarse root C 1.81 -0.001 3 0.097 0.016 59 N -1.24 0.008 4 0.125 <0.001 182 P -1.27 -0.000 2 <0.001 0.932 149 N:P 0.13 0.007 6 0.083 <0.001 149 C:N 2.76 -0.006 9 0.060 0.071 55 C:P 2.19 0.006 8 0.056 0.138 41 细根+粗根 Fine root + coarse root C 1.78 -0.001 1 0.057 0.021 92 N -1.13 0.008 2 0.090 <0.001 328 P -0.94 -0.002 5 0.005 0.232 272 N:P -0.01 0.009 0 0.077 <0.001 272 C:N 2.80 -0.008 2 0.084 0.006 88 C:P 2.24 0.005 6 0.033 0.172 58