Table 1 Soil chemical properties, granulometry and population of free-living diazotrophic bacteria at the 0–20 cm layer of the field sites before sowing
Site | pH (CaCl2) | Al (cmolc dm−3) | H + Al (cmolc dm−3) | K (cmolc dm−3) | Ca (cmolc dm−3) | Mg (cmolc dm−3) | P (g dm−3) | C (g dm−3) | SB (cmolc dm−3) | BS | Granulometry (%) MPNa | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
% | Clay | Silt | Sand | NMP soil g−1 | ||||||||||
2012/2013 | ||||||||||||||
Ponta Grossa | 4.60 | 0.26 | 3.07 | 0.37 | 3.55 | 1.73 | 1.71 | 18.55 | 5.65 | 64.79 | 58.4 | 15.7 | 25.9 | 1.5 × 104 |
Cachoeira Dourada | 5.40 | 0.00 | 7.89 | 0.15 | 2.02 | 1.30 | 0.80 | 30.50 | 3.47 | 30.54 | 57.8 | 18.2 | 24.0 | 4.5 × 106 |
2013/2014 | ||||||||||||||
Rio Verde | 5.02 | 0.10 | 3.03 | 0.17 | 3.46 | 0.94 | 2.45 | 29.43 | 4.57 | 60.13 | 36.3 | 9.6 | 54.1 | 2.5 × 106 |
Maracaí | 5.42 | 0.00 | 1.12 | 0.05 | 1.20 | 0.34 | 6.57 | 4.88 | 1.59 | 58.67 | 8.8 | 0.8 | 90.4 | 1.5 × 106 |
2014/2015 | ||||||||||||||
Londrina | 5.20 | 0.00 | 3.67 | 0.50 | 3.91 | 1.75 | 11.10 | 11.10 | 6.16 | 62.66 | 71.0 | 8.2 | 20.8 | 9.0 × 106 |
Ponta Grossa | 4.90 | 0.07 | 4.10 | 0.44 | 2.95 | 1.06 | 25.70 | 18.00 | 4.45 | 52.05 | 23.8 | 3.0 | 73.2 | 4.5 × 105 |