Generalized biomass equations for the main aboveground biomass components of maritime pine across contrasting environments

Table 1 Main environmental and dendrometric characteristics of sampled forest stands

Site	Berganton	Bilos	Bray	Herm. L9	Herm. L12	Malloula 1	Malloula 2	Ouechtata	Rimel	Saouania	Tbeinia
Number of plots	1	1	1	6	6	1	1	1	1	1	1
Sample size (trees plot⁻¹)	10	12	10	4	16	2	2	6	10	2	4
Location (lat, lon)	44°42′ N 0°46′ W	44°29′43′′N 0°57′09″W	44°42′ N 0°46′W	44°42′ N 0°46′ W	44°42′ N 0°46′ W	36° 56′50″N 8°42′27″ E	36° 57′07″ N 8°41′47″ E	36° 59′12″ N 8°58′09″ E	37° 17′48″ N 10° 0′21″ E	36° 58′12″ N 8°53′26″ E	36° 46′26″ N 8° 46′16″ E
Elevation (m)	56	38	61	58	58	195	232	116	41	67	499
Annual rainfall (mm)	930	930	930	930	930	1,068	1,094	925	627	940	1,281
Mean annual temperature (°C)	12.5	12.5	12.5	12.5	12.5	17.5	17.4	17. 8	18.1	18	16.3
Stand area (ha)	17	60	16	7	7	77	93	52.6	80.5	74	24
Plot area (ha)	0.198	9	4.70	1	1	1	1	1	1	1	1
Mean plot density (ha⁻¹)	334	223	621	1,144	836	758	441	792	332	791	834
Mean D (m)	0.3844	0.38	0.2603	0.1368	0.1841	0.1421	0.1213	0.1465	0.1720	0.1817	0.2476
Basal area (m² ha⁻¹)	38.76	25.2	33.8	17.26	27.32	13.860	7.23	17.32	8.23	24.37	42.10
Mean height (m)	20.8	20.3	17.6	8.8	10.5	5.3	7.4	8.5	7.0	9.8	15.6
Mean tree age (year)	32	50	26	9	12	31	28	31	35	35	40
Fertilization^a	2	1	2	1, 2, 3, 4	1, 2, 3, 4	1	1	1	1	1	1
Irrigation^b	0	0	0	0 or 1	0 or 1	0	0	0	0	0	0

See Trichet et al. (2008) for additional details
^aFertilisation level code: 1 control, 2 one unique input at plantation of 60 to 80 kg P as P₂O₅, 3 annual input of 20 to 50 kg P, 4 annual input of complete fertiliser (N, P, K, Ca, Mg and micronutrients)
^bIrrigation level code: 0 natural rainfall, 1 annual input of 450 to 550 mm year⁻¹

ISSN: 1297-966X