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

AMB Express

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

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	233^ns	31.78^ns	238^ns	8624 b	15.47^ns	133 c	42.2^ns	248^ns	30.74^ns	1297^ns	7723 b	11.86^ns	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

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)
n.s statistically non-significant