Epicormic ontogeny on Quercus petraea trunks and thinning effects quantified with the epicormic composition

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Table I

Main attributes of the experimental plots on which the epicormic composition has been recorded. Dominant height in m, Cg: average girth in cm, Density in #stems/ha, G: basal area in m²/ha. Secondary species are present in very small quantities in term of stem number and G. Numbers for oaks are thus not very different to those for all species present.

	Stand stage	Large saplings (LS)				Young small poles (YP)			Old small poles (OP)

Year	Treatments	LS0.81	LS0.60	LS0.37	LS0.21	YP0.93	YP0.41	YP0.23	OP0.94	OP0.54
Year		(control)				(control)			(control)

	Compartments	324				62 and 63			317

1996	Average age	22.2	22.3	22.4	21.5	31.1	30.8	33.4	40.9	40.1
1996	Dominant height	8.2	7.4	8.4	7	11.6	11.3	12	18	17.4

	Cg oak before release	11.6	13.0	11.4	11.4	21.5	21.6	23.5	39.3	38.5

	Cg oak after release	11.6	12.7	14.7	17.9	21.5	29.6	33.4	39.3	47.7

	Density of oak before release	14 937	10 905	14 556	14 762	6 059	6 464	5 154	2 200	2 333
	Density of oak after release	14 937	9 651	4 524	1 890	6 059	1 545	705	2 200	905
	G of oak before release	16.05	14.60	14.91	15.34	22.36	24.05	22.73	27.02	27.58
	G of oak after release	16.05	12.33	7.81	4.80	22.36	10.79	6.24	27.02	16.38
	Rdi of oak before release	0.81	0.71	0.750	0.77	0.93	1.00	0.92	0.94	0.97
	Rdi of oak after release	0.81	0.60	0.37	0.21	0.93	0.41	0.23	0.94	0.54

2002	Dominant height	10.0	8.87	10.11	8.81	13.95	13.76	13.73	19.09	18.82
2002	Cg oak	16.3	19.0	21.3	28.4	28.3	38.2	44.9	44.0	55.0

	Density of oak / ha	10 888	6 634	4 380	1 895	3 995	1 545	704	1 952	900
	G of oak	22.98	19.10	15.86	12.14	25.43	17.94	11.29	30.09	21.70
	Rdi of oak	1.04	0.83	0.66	0.47	0.98	0.63	0.38	1.01	0.68