Table 3 Generalized linear model analysis on black spruce wood properties showing the relation with ring width (RW) and tree height (H), within two types of stand structure (T—even-aged and uneven-aged) in unmanaged plots.

Factor

Source

F

P

Source

F

P

Source

F

P

Source

F

P

Wood density

Ring

RW

1.61

0.2120

H

9.03

0.0044

RW

0.76

0.3870

H

5.51

0.0235

T

0.35

0.5598

T

5.97

0.0187

T

2.00

0.1648

T

0.12

0.7340

RW*T

1.82

0.1850

H*T

3.55

0.0662

RW*T

3.15

0.0830

H*T

1.58

0.2151

Earlywood

RW

23.71

< 0.0001

H

4.47

0.0403

RW

0.88

0.3531

H

1.77

0.1907

T

0.09

0.7667

T

6.48

0.0146

T

2.30

0.1364

T

0.00

0.9571

RW*T

1.09

0.3015

H*T

1.10

0.2997

RW*T

7.75

0.0079

H*T

1.10

0.3009

Latewood

RW

52.69

< 0.0001

H

0.32

0.5724

RW

44.93

< 0.0001

H

10.25

0.0025

T

1.07

0.3063

T

1.61

0.2118

T

3.08

0.0864

T

0.36

0.5502

RW*T

0.63

0.4334

H*T

0.08

0.7844

RW*T

1.09

0.3024

H*T

0.50

0.4835

Maximum

RW

62.41

< 0.0001

H

0.64

0.4293

RW

50.88

< 0.0001

H

8.14

0.0066

T

0.68

0.4148

T

1.50

0.2273

T

1.64

0.2073

T

0.16

0.6912

RW*T

0.87

0.3559

H*T

0.18

0.6714

RW*T

2.40

0.1284

H*T

0.05

0.8253

Width

Latewood

RW

55.83

< 0.0001

H

1.38

0.2464

RW

133.17

< 0.0001

H

0.28

0.5974

T

1.58

0.2153

T

0.00

0.9543

T

0.21

0.6521

T

0.78

0.3818

RW*T

0.00

0.9562

H*T

0.83

0.3668

RW*T

2.65

0.1110

H*T

2.24

0.1420

Lumen area

Earlywood

RW

20.58

< 0.0001

H

0.75

0.3902

RW

8.82

0.0048

H

74.95

< 0.0001

T

6.97

0.0115

T

8.68

0.0050

T

90.15

< 0.0001

T

31.89

< 0.0001

RW*T

0.49

0.4863

H*T

1.59

0.2138

RW*T

4.57

0.0381

H*T

5.50

0.0233

Latewood

RW

22.66

< 0.0001

H

1.32

0.2569

RW

31.40

< 0.0001

H

7.09

0.0107

T

3.46

0.0697

T

1.38

0.2464

T

14.86

0.0004

T

7.15

0.0104

RW*T

0.22

0.6385

H*T

0.90

0.3489

RW*T

8.76

0.0049

H*T

1.15

0.2886

Cell-wall thickness

Earlywood

RW

3.38

0.0730

H

5.43

0.0243

RW

25.49

< 0.0001

H

0.06

0.8030

T

1.77

0.1909

T

0.17

0.6857

T

0.14

0.7057

T

5.59

0.0223

RW*T

2.97

0.0919

H*T

0.01

0.9235

RW*T

0.00

0.9721

H*T

0.18

0.6733

Latewood

RW

12.65

0.0009

H

5.06

0.0294

RW

22.74

<0.0001

H

0.12

0.7305

T

2.92

0.0947

T

0.04

0.8436

T

0.50

0.4817

T

1.96

0.1682

RW*T

0.07

0.7988

H*T

0.20

0.6563

RW*T

0.60

0.4439

H*T

3.28

0.0769

Tracheid length

Ring

RW

12.47

0.0010

H

12.38

0.0010

RW

1.32

0.2561

H

102.07

< 0.0001

T

6.81

0.0125

T

0.11

0.7411

T

55.76

< 0.0001

T

4.77

0.0341

RW*T

0.00

0.9633

H*T

0.35

0.5553

RW*T

0.57

0.4550

H*T

1.61

0.2106