Table 2 Normalized emission rates of biogenic volatile organic compounds (BVOCs) in dominant forest species in the Jing-Jin-Ji area (µg·g− 1·h− 1)
Forest species | Isoprene | α-pinene | β-pinene | β-myrcene | limonene | 3-carene | aOVOCs | bTVOCs |
|---|---|---|---|---|---|---|---|---|
Platycladus orientalis | 0.046 ± 0.017 | 2.329 ± 0.096 | 0.097 ± 0.015 | 0.364 ± 0.021 | 0.235 ± 0.046 | 1.362 ± 0.321 | 1.498 ± 0.537 | 5.931 ± 0.635 |
Robinia pseudoacacia | 9.767 ± 2.043 | 0.329 ± 0.067 | 0.236 ± 0.047 | 0.090 ± 0.017 | 0.142 ± 0.008 | 0.051 ± 0.004 | 1.870 ± 0.649 | 12.485 ± 2.145 |
Betula platyphylla | 2.624 ± 0.432 | 0.010 ± 0.004 | nd | nd | nd | nd | 1.497 ± 0.529 | 4.131 ± 0.683 |
Quercus variabilis | 17.017 ± 2.492 | nd | nd | nd | nd | nd | 0.987 ± 0.475 | 18.004 ± 2.537 |
Salix babylonica | 22.110 ± 3.347 | nd | nd | nd | nd | nd | 1.205 ± 0.486 | 23.315 ± 3.382 |
Populus tomentosa | 4.810 ± 1.057 | 0.173 ± 0.044 | 0.018 ± 0.003 | 0.104 ± 0.007 | 0.095 ± 0.042 | 0.001 ± 0.001 | 1.260 ± 0.492 | 6.461 ± 1.168 |
Pinus tabuliformis | 1.157 ± 0.240 | 2.065 ± 0.378 | 0.014 ± 0.002 | 2.576 ± 0.344 | 1.180 ± 0.233 | 0.007 ± 0.002 | 1.435 ± 0.762 | 8.434 ± 0.977 |
Ulmus pumila | 0.417 ± 0.090 | 0.117 ± 0.089 | nd | 0.132 ± 0.019 | nd | nd | 1.263 ± 0.358 | 1.929 ± 0.380 |
Larix gmelinii | 0.006 ± 0.002 | 5.195 ± 1.046 | 2.152 ± 0.928 | nd | nd | nd | 1.506 ± 0.951 | 8.859 ± 1.691 |