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New Zealand Journal of Forestry Science

Table 2 Measurements of excavated poplars and willows after 1 year

From: Observations of root growth of young poplar and willow planting types

1

2

3

4

5

6

7

8

9

10

11

Clone (planting type)

Height (m)

Net new height growth (m)

DBH (mm)

Root collar diameter (mm)

Total above-ground biomass (AGB) (kg)

AGB less weight of initial material (kg)

Total below-ground biomass (BGB)(incl. stump) (kg)

BGB less weight of initial material (kg)

Root biomass (excl. stump) (kg)

Total root length (m)

‘Kawa’ (pole)

3.97 (0.94)

1.68 (0.95)

55.3 (4.4)

73.0 (10.6)

3.78 (1.79)

2.42

4.56

4.15

3.35

379.04

‘Kawa’ (wand)

3.62 (0.95)

3.03 (0.93)

31.7 (11.9)

61.0 (12.7)

2.30 (1.08)

2.19

3.04

2.97

2.28

197.61

‘Kawa’ (stake)

4.75 (*)

4.59 (*)

38.0 (*)

75 (*)

1.00 (*)

0.97

1.79

1.75

1.22

306.40

‘Veronese’ (pole)

5.71 (0.16)

3.75 (0.15)

72.7 (4.1)

104.0 (1.5)

7.57 (0.44)

6.00

4.58

4.10

3.05

254.65

‘Veronese’ (wand)

4.12 (0.28)

3.59 (0.25)

36.7 (2.4)

74.7 (7.2)

3.88 (0.33)

3.82

2.02

1.98

1.49

155.34

‘Veronese’ (stake)

3.99 (0.11)

3.86 (0.10)

34.7 (0.3)

77.3 (8.3)

2.35 (0.20)

2.33

1.89

1.86

1.50

224.80

‘Hiwinui’ (pole)

5.73 (0.46)

3.31 (0.08)

74.7 (5.0)

121.3 (5.4)

14.54 (0.93)

13.31

6.97

6.60

4.70

533.02

‘Hiwinui’ (wand)

5.41 (0.21)

4.66 (0.03)

48.3 (2.0)

86.3 (1.8)

5.60 (0.36)

5.53

3.16

3.12

2.30

483.98

‘Hiwinui’ (stake)

4.16 (0.37)

4.00 (0.40)

31.3 (3.8)

79.0 (3.2)

3.18 (0.52)

3.16

2.96

2.93

2.2

219.09

‘Tangoio’ (pole)

6.13 (0.35)

3.95 (0.31)

76.5 (1.5)

109.0 (2.1)

9.93 (0.58)

8.64

7.79

7.40

5.52

525.33

‘Tangoio’ (wand)

4.82 (0.29)

4.27 (0.28)

34.7 (5.5)

95.7 (3.2)

5.34 (0.74)

5.26

4.13

4.08

3.30

280.71

‘Tangoio’ (stake)

3.92 (0.49)

3.78 (0.49)

30.3 (4.7)

90.0 (6.4)

3.32 (0.33)

3.29

2.47

2.43

1.72

287.04

  1. Above-ground data are from three trees per clone (n = 4) and planting type (n = 3) (* = dead tree). Below-ground data are from one tree per clone/planting type. Mean tree height (Column 2), mean net new height growth is tree height less height of planting material above ground at time of planting (Column 3). Above- (Column 6) and below-ground (Column 8) biomass includes original material. Columns 7 and 9 are total less initial values listed in Table 1. Root biomass (excluding stump and initial value of planted material below ground) (Column 10). Total root length of all roots > 1 mm in diameter (Column 11). Figures in brackets are standard errors.
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