Effect of peanut shells amendment on soil properties and growth of seedlings of Senegalia senegal (L.) Britton, Vachellia seyal (Delile) P. Hurter, and Prosopis juliflora (Swartz) DC in salt-affected soils

Table 4 Nodules number per plant and mycorrhizal root colonization (%) of Senegalia senegal, Vachellia seyal, and Prosopis juliflora seedlings grown on non-sterile sandy soil amended with four doses of peanut shells (0, 4, 6, and 8 t ha⁻¹) and exposed for 4 months to four salinity levels (0, 86, 171, and 257 mM NaCl) under greenhouse conditions

Salinity (mM NaCl)	Peanut shells (t ha⁻¹)	S. senegal		V. seyal		P. juliflora
Salinity (mM NaCl)	Peanut shells (t ha⁻¹)	NN	MRC	NN	MRC	NN	MRC
0	0	4 ± 1.2b	6.1 ± 2.3a	2±0.10b	1.4 ± 0.72a	4 ± 1.4a	21.2 ± 3.9b
	4	0a	18.5 ± 5.4b	16±2.3c	2.6 ± 0.80a	10 ± 2.1b	23.0 ± 3.1b
	6	0a	1.1 ± 0.01a	14±4.1c	10.9 ± 3.4b	14 ± 3.2b	32.8 ± 5.3c
	8	0a	0.1 ± 0.0a	0±0.0a	2.6 ± 0.9a	11 ± 2.5b	14.6 ± 2.4a
86	0	0	2.3 ± 1.7a	0	1.1 ± 0.02a	1 ± 0.0a	16.4 ± 2.2b
	4	0	19.3 ± 4.9b	0	2.0 ± 0.24b	18 ± 3.0c	37.7 ± 5.2c
	6	0	16.6 ± 3.3b	0	2.5 ± 0.26b	15 ± 2.4bc	19.7 ± 2.6b
	8	0	9.1 ± 4.7a	0	2.4 ± 0.23b	13 ± 1.9b	0.5 ± 0.01a
171	0	0	1.1 ± 0.92a	0	0.3 ± 0.21a	0	13.2 ± 2.8b
	4	0	11.2 ± 3.2b	0	1.7 ± 0.38b	0	16.6 ± 3.5b
	6	0	8.3 ± 1.3b	0	1.2 ± 0.29ab	0	10.9 ± 2.8b
	8	0	4.8 ± 2.1a	0	0.7 ± 0.3a	0	0.8 ± 0.02a
257	0	0	1.1 ± 0.86a	0	0.2 ± 0.12a	0	5.6 ± 1.02b
	4	0	8.7 ± 2.6b	0	2.5 ± 0.25c	0	7.7 ± 1.9b
	6	0	3.6 ± 2.7a	0	2.1 ± 0.21c	0	7.6 ± 1.4b
	8	0	2.4 ± 1.4a	0	1.4 ± 0.3b	0	1.8 ± 0.03a

For each NaCl concentration, values in column sharing the same letter comparing peanut shells doses are not significantly different at p < 0.05 (Student-Newman-Keuls test)
NN nodules number, MRC mycorrhizal root colonization

ISSN: 1297-966X