Growth, biomass, leaf area and water-use efficiency of juvenile Pinus radiata in response to water deficits

New Zealand Journal of Forestry Science

Table 2 Treatment variation in tree dimensions at the end of the experiment

Treatment	Tree height (mm)	Diameter (mm)	Ground-line diameter (mm)	Basal area (mm ² )	Slenderness
Well-watered	3544 (55) a	38.3 (0.8) a	44.8 (1.0) a	1590 (76) a	79.6 (1.2) a
Early-season drought	3220 (53) b	32.4 (0.6) b	37.1 (0.6) b	1086 (35) b	87.0 (1.0) b
Late-season drought	2997 (59) b	30.6 (0.6) b	35.8 (0.6) b	1015 (38) b	83.8 (1.3) ab
Summer drought	2606 (42) c	25.6 (0.4) c	31.0 (0.4) c	759 (21) c	84.1 (1.2) ab
Analysis of variance
Treatment	37.3***	44.3***	45.3***	34.3***	5.12*

Each value is the treatment mean with standard error in parentheses for 24 trees. The Tukey HSD test was performed between treatments. Means followed by the same letter are not significantly different at P < 0.05. Significance of treatment effects is shown as F value followed by P category: *significant at P < 0.05; ***significant at P < 0.001.