大针茅草原6种主要植物叶凋落物和根系分解特征与功能性状的关系

朱蔚娜, 张国龙, 张璞进, 张迁迁, 任瑾涛, 徐步云, 清华

Decomposition characteristics of leaf litters and roots of six main plant species and their relationships with functional traits in Stipa grandis steppe

ZHU Wei-Na, ZHANG Guo-Long, ZHANG Pu-Jin, ZHANG Qian-Qian, REN Jin-Tao, XU Bu-Yun, QING Hua

表4 内蒙古大针茅草原6种植物叶凋落物和根系多元逐步回归模型系数及显著性

Table 4 Multiple stepwise regression model coefficients and significance of leaf and root litters of six plant species in Stipa grandis steppe in Nei Mongol

分解时间段 Decomposition period (d) 凋落物类型 Litter type 模型 Model r 调整后的R2 Adjusted R2 F 显著性 Significance 赤池信息 准则值 AICc 0-104 叶 Leaf kL = 4.336 - 0.116X6 0.907 0.812 74.639 <0.001 1.213 0 kL = 5.448 - 0.140X6 - 0.057X7 0.945 0.878 62.069 <0.001 -4.300 6 kL = 4.968 - 0.149X6 - 0.055X7 + 0.19X5 0.962 0.910 58.202 <0.001 -7.094 9 根 Root kR = 2.411 - 0.055X6 0.826 0.663 34.410 <0.001 4.521 8 kR = 3.118 - 0.06X6 - 0.041X7 0.946 0.881 64.217 <0.001 6.992 0 kR = 3.937 - 0.056X6 - 0.046X7 - 0.019X1 0.976 0.942 92.731 <0.001 -22.226 0 105-223 叶 Leaf kL = 1.131 - 0.020X9 0.750 0.536 20.607 <0.001 -11.592 8 根 Root kR = 0.131 + 0.014X4 0.767 0.563 22.863 <0.001 -19.749 6 kR = -0.069 + 0.012X4 + 0.006X3 0.905 0.795 34.016 <0.001 -31.214 4 224-501 叶 Leaf kL = 0.15 + 0.027X7 0.695 0.451 14.985 0.001 -34.327 3 kL = -0.272 + 0.03X7 + 0.008X6 0.777 0.551 11.440 0.001 -31.549 6 根 Root kR = 0.071 + 0.04X4 0.679 0.427 13.685 0.002 -58.761 2 kR = 0.120 + 0.004X4 - 0.047X2 0.846 0.678 18.867 <0.001 -23.870 1 kR = 0.406 + 0.001X4 - 0.106X2 - 0.001X10 0.899 0.768 19.751 <0.001 -70.138 3 0-501 叶 Leaf kL = -1.059 - 0.023X6 0.874 0.749 51.631 <0.001 -51.201 6 kL = -1.050 - 0.029X6 + 0.005X9 0.924 0.835 43.920 <0.001 -56.544 5 kL = -1.407 - 0.044X6 + 0.01X9 - 0.019X7 0.960 0.904 54.266 <0.001 -63.616 2 根 Root kR = 0.119 + 0.012X4 0.944 0.885 131.926 <0.001 -58.386 3 kR = 0.212 + 0.012X4 - 0.137X11 0.960 0.911 88.248 <0.001 -60.832 1