Article 1563 Table 1

Table 1. BCT 1-series. The average values of various stand structure parameters from three sites in Southern Sweden with mean and dominating heights of ca 6 and 11 m, respectively. Values are shown before and after five thinning alternatives, including a control with no thinning. The other four treatments are conventional thinning, boom corridor thinning with corridor width of 1 m and length of 10 m (BCT_{1 m}), boom corridor thinning with corridor width of 2 m and length of 10 m (BCT_{2 m}), and selective boom corridor thinning with corridor width of 1 m and a length of 10 m (BCT_sel). Values with significant differences at the 0.05 probability level based on Tukey’s multiple comparison test are marked with different letters. Dg is the basal area weighted diameter at breast height (1.3 m). Diam. N_sel demonstrates the average DBH for each plot calculated from the same number of stems as were left in the conventional thinning plot. The removal of deciduous trees was calculated based on the amount of deciduous trees in the plot before treatment.

Parameter

Control

Conventional

BCT_{1 m}

BCT_{2 m}

BCT_sel

Before

After

Before

After

Before

After

Before

After

Before

After

All trees

DBH>80 mm

All trees

DBH>80 mm

All trees

DBH>80 mm

All trees

DBH>80 mm

All trees

DBH>80 mm

Stem Number (ha^–1)

9635^a

1524^a

7241^a

1168^c

622^b

7060^a

3949^bc

812^ab

9891^a

5833^ab

829^ab

8674^a

4568^bc

1034^ab

Dominant height (m)

11.2^a

10.6^a

10.7^a

11.3^a

Mean height (m)

6.0^a

6.0^b

9.7^a

6.3^a

10.2^a

10.0^a

6.2^a

8.6^a

9.6^a

5.4^a

8.3^a

9.3^a

6.3^a

9.1^a

10.1^a

Dg(cm)

5.7^a

5.7^b

10.3^a

5.6^a

9.5^a

10.7^a

5.3^a

6.1^b

10.3^a

4.7^a

5.2^b

10.0^a

5.1^a

6.4^b

10.5^a

Diam. N_sel

10.9^a

8.8^a

9.5^a

9.4^a

10.4^a

Stem volume (m³ha^–1)

116.7^a

73.8^a

107.4^a

39.5^b

32.8^a

87.1^a

55.1^b

35.6^a

88.5^a

60.4^b

36.2^a

109.6^a

76.4^ab

53.8^a

Percent of before

100^a

39^c

63^b

67^b

Biomass Dry weight (t ha^–¹)

72.6^a

44.3^a

68.3^a

23.7^b

18.9^b

62.2^a

35.1^b

22.3^ab

61.4^a

37.5^b

21.6^ab

72.3^a

46.4^ab

31.5^ab

Percent of before

100^a

37^c

56^bc

61^b

63^b

Removal of total (%):

Biomass

0^c

63^a

44^b

39^b

37^b

Stems

0^c

82^a

44^b

41^b

47^b

Biomass deciduous Dry weight (t ha^–¹)

21.4^a

18.6^a

1.5^b

18.0^a

10.4^b

17.3^a

11.0^ab

15.8^a

9.4^b

Removal of decid. (%):

Biomass

0^c

91^a

42^b

36^bc

34^bc

Stems

0^c

96^a

45^b

42^b

53^b