Co-inoculation of <i>Azospirillum brasilense</i> and <i>Herbaspirillum seropedicae</i> in maize

Dartora, Janaína; Marini, Deniele; Gonçalves, Edilaine. D. V.; Guimarães, Vandeir F.

doi:10.1590/1807-1929/agriambi.v20n6p545-550

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SOIL, WATER AND PLANT MANAGEMENT • Rev. bras. eng. agríc. ambient. 20 (6) • June 2016 • https://doi.org/10.1590/1807-1929/agriambi.v20n6p545-550 copy

Co-inoculation of Azospirillum brasilense and Herbaspirillum seropedicae in maize

Co-inoculação de Azospirillum brasilense e Herbaspirilum seropediceae na cultura do milho

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Bacteria from the genera Azospirillum and Herbaspirillum have been associated with increments in maize yield. The aim of this study was to evaluate the maize yield and nutritional content in response to inoculation with A. brasilense and H. seropediceae in association with nitrogen (N) fertilization. The experimental design was randomized blocks in a 4 x 5 factorial scheme, with four replicates. The treatments consisted of seed inoculation (control without N and inoculation, A. brasilense strain - AbV5, H. seropediceae strain - SMR1 and co-inoculation AbV5 + SMR1) and N doses (0, 40, 80, 120 and 160 kg ha^-1). The following variables were evaluated: ear insertion height, ear length, ear diameter, number of rows per ear, number of grains per row, ear weight, yield and NPK contents in leaves and grains. There was no interaction between the factors studied. Co-inoculation with the strains promoted increments of 12% in leaf P content, compared with control, and N fertilization promoted increase in yield and leaf P content up to the maximum dose studied.

Key words:
Zea mays L.; growth-promoting bactéria; phytohormones

SV	DF	Mean squares
SV	DF	EIH	EL	ED	NRE	NGR	EW	YIELD	NL	PL	KL	NG	PG	KG
Block	3	591.59	1.32	2.63	0.08	5.81	1215.41	1226825	25.31	0.23	909.34	1.80	0.50	0.97
Inoculant	3	143.28^ , *** Significant at 0.05 and 0.01 by F test;	4.28^ , *** Significant at 0.05 and 0.01 by F test;	6.93^ , *** Significant at 0.05 and 0.01 by F test;	0.08 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	6.63 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	2894.04^ , *** Significant at 0.05 and 0.01 by F test;	4103749 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	34.01 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.60^* *, ** Significant at 0.05 and 0.01 by F test;	36.58 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	64.78^* *, ** Significant at 0.05 and 0.01 by F test;	0.18 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	1.16 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation
N doses	4	128.02^ , *** Significant at 0.05 and 0.01 by F test;	1.50^* *, ** Significant at 0.05 and 0.01 by F test;	6.63^ , *** Significant at 0.05 and 0.01 by F test;	1.08 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	4.29 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	2204.79^* *, ** Significant at 0.05 and 0.01 by F test;	9443146^ , *** Significant at 0.05 and 0.01 by F test;	17.53 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.68^ , *** Significant at 0.05 and 0.01 by F test;	14.87 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	22.78 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.25 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	1.92 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation
I X N	12	37.46 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.22 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	1.56 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	1.98 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	2.87 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	466.03 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	1313974 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	13.36 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.18 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	9.32 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	14.94 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.14 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation	0.51 ^ns ns Not significant; SV – Source of variation; DF – Degrees of freedom; CV – Coefficient of variation
Residue	57	33.82	0.47	0.81	1.18	3.47	647.12	1805781	14.13	0.17	21.95	19.38	0.20	1.06
CV (%)		4.29	3.62	1.72	6.88	4.75	9.56	13.84	12.0	12.08	8.94	33.6	23.01	6.85

Treatment	EIH	EL	ED	NRE	NGR	EW	YIELD	NL	NG	PL	PG	KL	KG
Treatment	cm		Mm	NRE	NGR	g	kg ha^-1	NL	NG	PL	PG	KL	KG
Control	138 a	18 b	52 b	16 a	39 a	252 b	12,651 a	30 a	13 ab	3.2 b	2.0 a	54 a	15 a
AbV5	137 ab	18 b	52 b	16 a	39 a	260 ab	12,537 a	32 a	11 b	3.3 ab	1.8 a	53 a	15 a
SmR1	135 ab	19 a	53 a	16 a	39 a	277 a	12,905 a	30 a	12 ab	3.6 a	2.0 a	52 a	15 a
AbV5 + SmR1	132 b	19 a	53 a	16 a	40 a	275 a	13,573 a	33 a	16 a	3.5 ab	2.0 a	51 a	15 a
Mean	136	19	52	16	39	266	12,916	31	13	3.4	2.0	52	15
CV (%)	4.29	3.62	1.72	6.88	4.75	9.56	12.77	12.00	33.60	12.08	23.01	8.94	6.85

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[1] janaina_dartora@yahoo.com.br (Corresponding author)