The potential of Eucalyptus plantations to restore degraded soils in semi-arid Morocco (NW Africa)

Table 2 Exports of biomass and nutrients from eucalyptus stands under different harvest scenarios

	Biomass	N	P	K	Ca	Mg
a. Biomass (Mg ha⁻¹) and mineral mass (kg ha⁻¹)
S (S1)	143	246	55	660	775	68
SR100 (S2)	188	601	99	934	1420	144
SB (S3)	162	299	63	718	1543	120
SBR80 (S4)	198	582	98	938	2059	181
SBR100 (S5)	207	653	107	993	2188	196
b. Biomass and mineral mass (% of standing stocks)
S (S1)	69	38	51	66	35	35
SR100 (S2)	91	92	93	94	65	73
SB (S3)	78	46	59	72	71	61
SBR80 (S4)	96	89	92	94	94	92
SBR100 (S5)	100	100	100	100	100	100
c. Nutrient stocks in soil for the eucalyptus stands before biomass harvest (kg ha⁻¹; 0–100 cm soil layer)
Euca-P1		1665	80	219	1771	411
Euca-C2		2195	119	288	2112	439
Euca-C3		2869	167	271	2287	619
Euca-C4		3195	162	305	2524	713

Eucalyptus stands: four rotations of 12 years (one plantation, followed by three coppiced stands)
Euca-P1 eucalyptus plantation, Euca-C2, Euca-C3, and Euca-C4 coppiced eucalyptus stands (2nd, 3rd, and 4th rotations), S stem wood (stems with circumference at breast height > 7 cm) harvested, B stem bark harvested, R80 and R100 80 or 100% of harvesting residues exported

ISSN: 1297-966X