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

AMB Express

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

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	13.0^ns	176^ns	25.27^ns	328^ns	6465^ns	11.77^ns	76 b	40.3^ns	153^ns	22.49^ns	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

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)
n.s statistically non-significant