Mycorrhization, growth and nutrition of Pinus halepensis seedlings fertilized with different doses and sources of nitrogen

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Table IV

Nutrient concentration in needles of P. halepensis seedlings inoculated with three ectomycorrhizal fungi under different N fertilisation sources (ammonium nitrate-NH₄NO_3,ammonium-(NH₄)₂SO₄, nitrate-HNO₃). For each inoculation treatment, different letters indicate significant differences (Duncan’s test, p ≤ 0.05).

Inoculation	N	N	P	K
	source	(%)	(%)	(%)
P. tinctorius 3SR
	NH₄NO₃	1.00 ± 0.04 a	0.20 ± 0.03 a	1.07 ± 0.08 a
	(NH₄)₂SO₄	0.90 ± 0.03 a	0.18 ± 0.02 a	0.96 ± 0.04 a
	HNO₃	0.96 ± 0.03 a	0.24 ± 0.01 a	1.21 ± 0.08 a
L. deliciosus
	NH₄NO₃	0.96 ± 0.02 a	0.22 ± 0.01 a	1.14 ± 0.03 a
	(NH₄)₂SO₄	0.95 ± 0.05 a	0.22 ± 0.01 a	0.86 ± 0.05 b
	HNO₃	0.91 ± 0.10 a	0.21 ± 0.03 a	0.88 ± 0.07 b
Uninoculated
	NH₄NO₃	0.78 ± 0.04 a	0.19 ± 0.05 a	1.09 ± 0.07 a
	(NH₄)₂SO₄	0.89 ± 0.02 a	0.18 ± 0.03 a	0.84 ± 0.02 b
	HNO₃	0.93 ± 0.03 a	0.2 ± 0.03 a	0.9 ± 0.05 ab
ANOVA significance^∗
Inoculation		ns	ns	^∗∗
N source fertilization		ns	ns	^∗∗
I × F		ns	ns	ns

^∗

Summary of the ANOVA of the effects of inoculation (I), N source fertilization (F) and their interactions;

^∗∗

significant at p < 0.05;

ns: non-significant.