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Table III
Comparisons of leaf-litter concentrations of N and P as well as N:P ratio (on a mass basis) in this study with previous ones.
| N (mg g-1) | P (mg g-1) | N:P ratio | |
|
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| This study* | |||
| Woody plants | 10.93 ± 6.48 (677) | 0.85 ± 0.71(482) | 18.32 ± 11.17 (482) |
| Shrubs | 10.24 ± 6.06 (61) | 0.92 ± 0.74 (42) | 15.96 ± 11.32 (42) |
| Evergreen broadleaf | 12.30 ± 6.02 (176) | 0.84 ± 0.86 (141) | 20.67 ± 11.68 (141) |
| Deciduous broadleaf | 12.12 ± 6.69 (306) | 0.90 ± 0.65 (234) | 18.20 ± 11.46 (234) |
| Conifers | 6.69 ± 4.71 (134) | 0.62 ± 0.47 (65) | 15.13 ± 7.31 (65) |
| Yuan and Chen (2009b)† | |||
| Evergreen | 9.6 | 0.5 | |
| Deciduous | 10.3 | 0.9 | |
| Conifers | 7.9 | 0.6 | |
| Yuan and Chen (2009b)‡ | |||
| Tundra | 6.8 ± 0.3 (41) | 0.5 ± 0.1 (9) | 23.1 ± 8.9 (5) |
| Boreal forest | 8.6 ± 0.3 (253) | 0.8 ± 0.0 (152) | 15.0 ± 0.9 (141) |
| Temperate forest | 9.8 ± 0.2 (439) | 0.7 ± 0.0 (233) | 17.6 ± 0.6 (204) |
| Mediterranean forest | 9.6 ± 0.5 (32) | 0.6 ± 0.0 (35) | 17.8 ± 1.2 (28) |
| Tropical forest | 12.5 ± 0.3 (255) | 0.4 ± 0.0 (172) | 27.3 ± 1.2 (112) |
| Grassland | 8.7 ± 0.5 (69) | 1.1 ± 0.1 924) | 14.7 ± 8.9 (10) |
| Average | 10.0 ± 0.1 (1089) | 0.7 ± 0.00 (625) | 19.2 ± 0.5 (500) |
| McGroddy et al. (2004)¶ | |||
| Woody plants | 20.6 (99) | ||
| Temperate broadleaf | 13.2 (30) | ||
| Temperate conifers | 11.8 (20) | ||
| Tropical broadleaf | 28.4 (50) | ||