Research Article
The Effects of Plant-Soil-Enzyme Interactions on Plant Composition, Biomass and Diversity of Alpine Meadows in the Qinghai-Tibetan Plateau
Table 4
Path analysis on CAB to soil C and soil enzyme activity.
| Vegetation type | Factors | Decision coefficient | Direct path coefficient | Indirect path coefficient | Residual path coefficient |
| | | | | Sum | X1 | X3 | X5 | X6 | | K. humilis meadow | X1 | 0.9980 | 0.5514 | –1.0813 | | –0.1062 | –0.9303 | –0.0448 |
0.0447 | X3 | 0.9041 | –0.8618 | –0.0648 | | –0.1141 | –0.6829 | X5 | 1.442 | –0.4759 | –0.3557 | –0.0716 | | –0.0486 | X6 | –0.7558 | 0.9424 | 0.0327 | 0.8169 | 0.0928 | | |
| | | | | Sum | X1 | X2 | X4 | X6 | | K. pygmaea meadow | X1 | 0.9982 | –0.1287 | –0.3535 | | –0.5273 | 0.3074 | –0.1336 |
0.0425 | X2 | 1.6879 | –0.8951 | 0.0402 | | –0.7847 | –0.1506 | X4 | 1.3326 | –1.8235 | –0.0297 | –0.9939 | | –0.7999 | X6 | –1.247 | 1.0449 | –0.0138 | 0.2039 | 0.8548 | | |
| | | | | Sum | X1 | X3 | X4 | X5 | | K. tibetica swamp meadow | X1 | 0.9968 | 0.8422 | 0.1142 | | –0.0049 | –0.2185 | 0.3376 |
0.0567 | X3 | –0.7938 | 0.2236 | 0.2302 | | –0.1331 | 0.1265 | X4 | 0.5463 | 0.3561 | –0.0869 | 0.169 | | 0.274 | X5 | -0.4195 | –0.0984 | 0.0493 | 0.2092 | –0.3569 | | |
| | | | | Sum | X1 | X2 | X3 | X5 | | Potentilla fruticosa shrub meadow | X1 | 0.9906 | 1.6654 | –2.1592 | | –0.8184 | 0.1685 | –1.5093 |
0.0890 | X2 | –1.2846 | 0.4194 | 1.0564 | | 0.6073 | –1.2443 | X3 | –1.2521 | 1.8134 | –0.2241 | 0.6231 | | 1.4144 | X5 | 2.021 | –1.3292 | –1.2438 | 0.7909 | –0.8763 | |
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Y: CAB, X1: Soil organic carbon, X2: Soil microbial biomass C, X3: Urease, X4: Protease, X5: Alkali phosphatase, X6: Invertase.
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