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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