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Table 4 Effect of Azospirillum brasilense strains CNPSo 2083 and CNPSo 2084 and of metabolites of R. tropici strain CIAT 899 enriched with 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-PRÓ2

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

Treatment Londrina Ponta Grossa
29 DAS Maturity 53 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) NS (g kg−1) TNS (mgN pl−1) Yield (kg ha−1) NG (g kg−1) TNG (mgN pl−1)
Non-inoculated control 7.5 b 233ns 31.78ns 238ns 8624 b 15.47ns 133 c 42.2ns 248ns 30.74ns 1297ns 7723 b 11.86ns 92 ns
Seed inoculated (Azospirillum) 7.9 ab 236 31.32 247 9472 a 15.76 149 abc 41.0 246 30.70 1259 7632 b 12.17 93
Seed inoculated (Azospirillum + enriched metabolites) 7.8 ab 239 32.17 251 9581 a 15.78 151 ab 42.2 249 30.33 1280 8453 a 12.18 103
Leaf spray inoculation (Azospirillum) 8.3 a 228 32.32 268 8815 b 15.43 136 bc 40.8 248 30.91 1261 7426 b 12.31 91
Leaf spray inoculation (Azospirillum
+ enriched metabolites)
8.3 a 238 32.43 269 9426 a 16.50 156 a 45.9 256 30.47 1398 8250 a 12.11 100
  1. Field experiments performed in Londrina and Ponta Grossa in the summer crop season of 2014/2015. 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