Differences in branch characteristics of Scots pine (Pinus sylvestris L.) genetic entries grown at different spacing

Free Access

Table IV

Mean and standard deviation (sd) for relative crown base height (RCBH), relative cumulative cross-sectional branch area (RCBA), average branch length (ABL, cm), number of living branches (NLB), average branch angle (ABA, degrees) and relative average branch diameter (RABD) in spacing 1, 2 and 3 (current stand density of 2000, 2000-2500 and 4000 trees ha⁻¹, respectively) and for all spacing. Different letters indicate differences among origin groups (OG) within each spacing, Tukey (p < 0.05).

		NLB	ABL	RCBH	RCBA	ABA	RABD

	OG	Mean ± sd	Mean ± sd	Mean ± sd	Mean ± sd	Mean ± sd	Mean ± sd
Spacing 1	Northern	23.4 ± 5.6a	95 ± 36a	0.57 ± 0.06a	0.21 ± 0.06a	35 ± 10a	0.165 ± 0.01a
	Central	25.9 ± 6.3ab	91 ± 27a	0.62 ± 0.06a	0.18 ± 0.05a	34 ± 13a	0.165 ± 0.01a
	Southern	30.9 ± 6.9b	78 ± 24a	0.59 ± 0.05a	0.18 ± 0.07a	41 ± 14a	0.142 ± 0.02a
	All	26.7 ± 7.0	88 ± 36	0.59 ± 0.06	0.19 ± 0.06	37 ± 11	0.157 ± 0.02
Spacing 2	Northern	24.9 ± 4.9a	104 ± 28a	0.58 ± 0.04a	0.17 ± 0.05a	39 ± 8a	0.158 ± 0.02a
	Central	28.8 ± 6.0ab	102 ± 46a	0.54 ± 0.06a	0.16 ± 0.06a	47 ± 14a	0.146 ± 0.04a
	Southern	32.8 ± 6.5b	76 ± 43a	0.60 ± 0.05a	0.15 ± 0.05a	46 ± 19a	0.137 ± 0.04a
	All	29.0 ± 6.8	94 ± 28	0.57 ± 0.05	0.16 ± 0.06	44 ± 12	0.147 ± 0.02
Spacing 3	Northern	25.5 ± 8.1a	70 ± 23a	0.62 ± 0.06a	0.15 ± 0.06a	35 ± 8a	0.150 ± 0.02a
	Central	26.9 ± 3.3a	68 ± 19a	0.62 ± 0.04a	0.10 ± 0.03a	39 ± 7a	0.142 ± 0.01a
	Southern	21.7 ± 4.7a	61 ± 24a	0.63 ± 0.04a	0.12 ± 0.04a	35 ± 12a	0.147 ± 0.01a
	All	24.7 ± 6.0	66 ± 22	0.62 ± 0.05	0.13 ± 0.05	36 ± 9	0.146 ± 0.02

All spacing	Northern	24.6 ± 6.3a	90 ± 32a	0.59 ± 0.06a	0.18 ± 0.06a	36 ± 9a	0.158 ± 0.02a

	Central	27.2 ± 5.1a	87 ± 33a	0.60 ± 0.06a	0.15 ± 0.05a	40 ± 12a	0.151 ± 0.02ab

	Southern	28.5 ± 8.2a	71 ± 26a	0.60 ± 0.06a	0.15 ± 0.06a	41 ± 13a	0.142 ± 0.01b