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Table 3 Effect of Azospirillum brasilense strains CNPSo 2083 and CNPSo 2084 and of enriched metabolites of R. tropici strain CIAT 899 enriched in LCOs applied to the seeds at sowing or by leaf spray at the V3 stage on plant growth (shoot dry weight, SDW; plant height, PH), shoot N (content [NS] and total N accumulated in shoots [TNS]) at 32 and 42 days after sowing (DAS), and grain parameters (yield, N content in grains [NG] and total N accumulated in grains [TNG]) in maize hybrid DKB- 350-PRÓ

From: Maize growth promotion by inoculation with Azospirillum brasilense and metabolites of Rhizobium tropici enriched on lipo-chitooligosaccharides (LCOs)

Treatment Rio Verde Maracaí
32 DAS Maturity 42 DAS Maturity
SDW (g pl−1) PH (cm) NS (g kg−1) TNS (mgN pl−1) Yield (kg ha−1) NG (g kg−1) TNG (mgN pl−1) SDW (g pl−1) PH (cm) N (g kg−1) TNS (mgN pl−1) Yield (kg ha−1) NG (g kg−1) TNG (mgN pl−1)
Non-inoculated control 13.0ns 176ns 25.27ns 328ns 6465ns 11.77ns 76 b 40.3ns 153ns 22.49ns 806 b 3091 d 14.13 bc 44 c
Seed inoculated (Azospirillum) 12.1 174 26.74 324 6758 11.23 76 b 40.4 149 23.41 946 a 3486 bc 15.41 ab 54 b
Seed inoculated (Azospirillum + enriched metabolites) 11.9 175 26.81 320 6769 13.93 94 a 40.8 151 23.35 953 a 3698 ab 14.41 abc 53 b
Leaf spray inoculation (Azospirillum) 11.8 176 28.08 331 6621 11.12 74 b 40.7 150 23.31 948 a 3278 cd 13.59 c 44 c
Leaf spray inoculation (Azospirillum
+ enriched metabolites)
11.9 174 28.18 335 6792 13.92 94 a 43.7 149 23.39 1022 a 3958 a 15.79 a 62 a
  1. Field experiments performed in Rio Verde and Maracaí in the summer crop season of 2013/2014. Means (n = 6) on the same column which are followed by different letters are significantly different (p ≤ 0.10, Duncan test)
  2. n.s statistically non-significant