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Table 3 Parameter estimates of tree biomass model systems for 13 tree species or groups in China

From: Development of monitoring and assessment of forest biomass and carbon storage in China

Tree species (groups) Number of samples Model Aboveground biomass equation (1) Belowground biomass equation (2) Stem volume equation (3) Biomass conversion factor model (4) Root-to-shoot ratio model (5)
a 0 a 1 a 2 b 0 b 1 b 2 c 0 c 1 c 2 d 0 d 1 d 2 e 0 e 1 e 2
Abies 150 One-variable 0.15777 2.2674   0.01092 2.6672   0.13438 2.5198   1.1740 −0.2524   0.0692 0.3998  
Two-variable 0.15777 2.2674 0.0000 0.01484 2.9248 −0.4191 0.08366 1.8997 0.8657 1.8859 0.3677 −0.8657 0.0941 0.6574 −0.4191
Picea 451 One-variable 0.24686 2.1451   0.04371 2.2254   0.15021 2.4523   1.6435 −0.3072   0.1770 0.0803  
Two-variable 0.22121 2.0120 0.1925 0.05006 2.3902 −0.2382 0.08042 1.6940 1.0960 2.7506 0.3180 −0.9035 0.2263 0.3783 −0.4306
Cunninghamia lanceolata 303 One-variable 0.07629 2.3909   0.02533 2.2666   0.11013 2.5580   0.6927 −0.1671   0.3320 −0.1244  
Two-variable 0.06326 2.0339 0.4745 0.02196 2.0339 0.3171 0.07416 1.8040 1.0022 0.8530 0.2300 −0.5277 0.3471 0.0000 −0.1574
Cupressus 136 One-variable 0.22284 2.1986   0.08499 1.9766   0.15048 2.3080   1.4808 −0.1094   0.3814 −0.2219  
Two-variable 0.19087 2.0064 0.3218 0.10163 2.1985 −0.3715 0.10175 1.8225 0.8130 1.8759 0.1839 −0.4913 0.5325 0.1920 −0.6933
Larix 300 One-variable 0.10555 2.3895   0.02215 2.5209   0.12464 2.5162   0.8468 −0.1266   0.2098 0.1314  
Two-variable 0.08243 2.0780 0.4412 0.01781 2.2464 0.3888 0.07098 1.8067 1.0050 1.1614 0.2714 −0.5638 0.2161 0.1684 −0.0524
Pinus massoniana 302 One-variable 0.14221 2.3141   0.02268 2.3692   0.17234 2.4225   0.8252 −0.1083   0.1595 0.0551  
Two-variable 0.08982 1.9746 0.5470 0.02678 2.4916 −0.1974 0.08215 1.8749 0.8821 1.0934 0.0997 −0.3351 0.2982 0.5171 −0.7444
Pinus yunnanensis 150 One-variable 0.09492 2.3567   0.01654 2.3449   0.17251 2.3759   0.5502 −0.0193   0.1743 −0.0118  
Two-variable 0.07023 2.1039 0.4112 0.01436 2.2264 0.1928 0.09653 1.8889 0.7924 0.7275 0.2151 −0.3812 0.2045 0.1225 −0.2184
Pinus tabulaeformis 150 One-variable 0.12338 2.3460   0.02630 2.3666   0.15585 2.3885   0.7916 −0.0425   0.2132 0.0206  
Two-variable 0.10081 2.0712 0.4142 0.02627 2.3650 0.0024 0.11016 1.9165 0.7115 0.9151 0.1547 −0.2972 0.2606 0.2938 −0.4118
Pinus elliottii 154 One-variable 0.08893 2.4234   0.06849 2.0813   0.14039 2.4275   0.6334 −0.0041   0.7702 −0.3421  
Two-variable 0.06148 2.0342 0.6162 0.07425 2.1666 −0.1350 0.08277 1.8701 0.8822 0.7428 0.1640 −0.2661 1.2077 0.1324 −0.7511
Quercus 460 One-variable 0.14233 2.3798   0.07334 2.1410   0.11681 2.5073   1.2184 −0.1275   0.5153 −0.2388  
Two-variable 0.09160 1.8578 0.7811 0.07328 2.1399 0.0017 0.06751 1.8578 0.9719 1.3569 0.0000 −0.1908 0.8000 0.2821 −0.7794
Betula 450 One-variable 0.10130 2.4191   0.05549 2.1976   0.17682 2.3643   0.5729 0.0548   0.5478 −0.2215  
Two-variable 0.05992 2.0638 0.6032 0.05536 2.1961 0.0026 0.07971 1.8252 0.9153 0.7517 0.2386 −0.3121 0.9240 0.1322 −0.6005
Populus 602 One-variable 0.08653 2.4685   0.02702 2.3420   0.15280 2.4447   0.5663 0.0239   0.3123 −0.1265  
Two-variable 0.07055 2.3333 0.2215 0.04079 2.6147 −0.4465 0.07139 1.9406 0.8255 0.9882 0.3926 −0.6040 0.5782 0.2814 −0.6680
Schima superba 150 One-variable 0.17922 2.2574   0.07816 2.1354   0.18518 2.3413   0.9678 −0.0839   0.4361 −0.1220  
Two-variable 0.10504 1.9906 0.5209 0.06898 2.0730 0.1218 0.08043 1.9249 0.8132 1.3061 0.0658 −0.2923 0.6567 0.0824 −0.3991