Table 6 Boundary between juvenile and mature wood based on radial variation of latewood tracheid length.

From: Physical and mechanical properties of wood and their geographic variations in Larix sibirica trees naturally grown in Mongolia

Provenance

Sample tree

Logarithmic formula

r2

Boundary between JW and MW (ARN from pith)

Khentii

1

y = 1.412 log10(X) + 1.297

0.950

22

2

y = 1.000 log10(X) + 1.376

0.817

19

3

y = 0.912 log10(X) + 1.388

0.821

17

4

y = 0.671 log10(X) + 1.204

0.862

17

5

y = 0.790 log10(X) + 1.255

0.923

18

Arkhangai

1

y = 1.205 log10(X) + 1.349

0.893

20

2

y = 1.232 log10(X) + 1.438

0.950

20

3

y = 1.491 log10(X) + 1.339

0.927

21

4

y = 1.144 log10(X) + 1.339

0.918

20

5

y = 1.047 log10(X) + 1.252

0.897

20

Zavkhan

1

y = 1.191 log10(X) + 1.399

0.870

20

2

y = 1.601 log10(X) + 1.338

0.921

22

3

y = 1.471 log10(X) + 1.268

0.942

22

4

y = 1.508 log10(X) + 1.108

0.914

24

5

y = 1.288 log10(X) + 1.351

0.958

21

Khuvsgul

1

y = 1.576 log10(X) + 1.399

0.875

22

2

y = 1.588 log10(X) + 1.298

0.863

22

3

y = 1.610 log10(X) + 1.394

0.899

21

4

y = 1.652 log10(X) + 1.335

0.886

22

5

y = 1.554 log10(X) + 1.336

0.948

22

Selenge

1

y = 1.417 log10(X) + 1.268

0.941

21

2

y = 1.112 log10(X) + 1.316

0.911

20

3

y = 1.133 log10(X) + 1.353

0.892

20

4

y = 1.280 log10(X) + 1.451

0.896

20

5

y = 0.946 log10(X) + 1.419

0.895

18

F-value

   

5.827

p-value

   

0.003

  1. r2 coefficient of determination, JW juvenile wood, MW mature wood, ARN annual ring number. F-values and p-values were obtained with a one-way ANOVA for annual ring number at the boundary between JW and MW among provenances. In the logarithmic formula, y and X indicate tracheid length and annual ring number from the pith, respectively.
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