Colonization and Spore Richness of Arbuscular Mycorrhizal Fungi in Araucaria Nursery Seedlings in Curitiba, Brazil
Table 1
Chemical attributes of soils used in the nursery experiment with araucaria in Curitiba, Brazil.
Soil attribute
Seedling age
6 months
1 year
2 years
3 years
5-years
pH CaCl2
5.5 ± 0.240
4.9 ± 0.081
5.5 ± 0.122
5.2 ± 0.173
4.3 ± 0.394
Al3+ (cmol/dm3)
0.0 ± 0.0
0.9 ± 0.176
0.0 ± 0.0
0.0 ± 0.042
2.7 ± 1.494
H + Al3+ (cmol/dm3)
5.1 ± 0.678
13.2 ± 1.327
7.4 ± 0.903
7.2 ± 0.537
13.9 ± 2.591
Ca2+ (cmol/dm3)
4.3 ± 0.221
6.1 ± 0.522
9.4 ± 0.685
7.1 ± 1.784
3.0 ± 1.338
Mg2+ (cmol/dm3)
1.8 ± 0.078
3.7 ± 0.355
4.3 ± 0.269
2.9 ± 0.930
1.6 ± 1.338
K+ (cmol/dm3)
1.1 ± 0.260
0.3 ± 0.151
1.0 ± 0.286
0.7 ± 0.443
0.2 ± 0.128
P (mg/dm3)
16.7 ± 5.390
78.2 ± 16.967
144.5 ± 16.408
87.5 ± 30.295
79.1 ± 42.421
C (g/dm3)
12.7 ± 3.457
85.3 ± 27.451
64.3 ± 11.419
46.7 ± 16.486
61.4 ± 55.447
pH measured in CaCl2 0.01 mol L−1; Ca2+, Mg2+, and Al3+ extracted with KCl 1 mol L−1; H+ + Al3+ extracted with calcium acetate 0.5 mol L−1; K+ and P extracted with the Mehlich-1 extractor; C determined with K2Cr2O7.
