BORON AND ZINC FERTILIZER APPLICATION TO MAIZE CROPS IN A LITHIC QUARTZIPSAMMENT<sup/>

CRUZ, SIHÉLIO JÚLIO SILVA; COSTA JÚNIOR, JOSÉ ROBERTO DA; OLIVEIRA, SILVIA SANIELLE COSTA DE; PONCIANO, VANESSA DE FÁTIMA GRAH; VALICHESKI, ROMANO ROBERTO

doi:10.1590/1983-21252022v35n412rc

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Agronomy • Rev. Caatinga 35 (4) • Oct-Dec 2022 • https://doi.org/10.1590/1983-21252022v35n412rc copy

BORON AND ZINC FERTILIZER APPLICATION TO MAIZE CROPS IN A LITHIC QUARTZIPSAMMENT¹ 1 Paper extracted from the dissertation masters of the first author

ADUBAÇÃO COM BORO E ZINCO NO CULTIVO DE MILHO EM NEOSSOLO LITÓLICO DISTRÓFICO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this work was to evaluate the effect of soil application of different boron (B) rates to the soil, with and without application of zinc (Zn), on growth, production components, and grain yield of maize crops grown in a Lithic Quartzipsamment with low B and Zn contents. A randomized block experimental design was used, in a 6×2 factorial arrangement corresponding to six B rates (0, 1, 2, 3, 4, and 5 kg ha^-1), with and without application of Zn (2.0 kg ha^-1), applied to the soil at sowing, with four replications. Growth variables (stem diameter and plant height), and chlorophyll SPAD index were evaluated at the R1 phenological stage. Maize ear length, one-thousand grain weight, and grain yield, and the B maximum efficiency rate were evaluated at the R6 phenological stage. Application of B and Zn to the soil increases maize grain yield in soils with sandy clay loam texture and low B and Zn contents; the plant absorption and metabolism indicated synergism between these elements when using soil applications of 1.0 kg ha^-1 of B combined with 2.0 kg ha^-1 of Zn to the planting furrows. The rates with maximum technical efficiency for grain yield were 3.29 and 4.31 kg of B ha^-1 in treatments without and with application of Zn, respectively.

Keywords
Zea Mays L; Mineral nutrition; Micronutrient

Layer cm	pH CaCl₂	OM g dm³	P_mehlich-1 mg dm³	Al³⁺	H+Al	K	Ca	Mg	S	B	Zn	CEC	BS	AS
Layer cm	pH CaCl₂	OM g dm³	P_mehlich-1 mg dm³	Al³⁺	----------cmol_c dm³---------				-----mg dm³-----			CEC	BS	AS
0-20	5.6	16	1.5	0	2.4	0.4	3.5	1.7	2	0.05	0.7	8	70	0
20-40	4.7	10	0.7	0.1	2.4	0.2	1.8	0.9	1	0.03	0.1	6.3	46	3.5

Fertilization	Culm diameter (mm)
2.0 kg ha^-1	-------------------------------------- Rates of B (kg ha^-1) -----------------------------------
of Zn	0	1	2	3	4	5
With	17 b	19 ab	19 a	20 a	19 ab	19 a
Without	17 b	19 ab	18 ab	20 a	20 a	19 a
"F" (rates of B)						0.00
"F" (Zn Fertilization)						0.81
"F" (B x Zn interaction)						0.28
CV%						4.27

Fertilization	Chlorophyll SPAD index
2.0 kg ha^-1	--------------------------------------- Rates of B (kg ha^-1) ---------------------------------------
of Zn	0	1	2	3	4	5
With Without	39 bA 42 aA	49 aA 44 aB	48 aA 47 aA	48 aA 45 aA	47 aA 46 aA	40 bA 42 aA
"F" (rates of B)						0.00
"F" (Zn Fertilization)						0.16
"F" (B x Zn interaction)						0.03
CV%						6.47

Fertilization	Weight of 1000 grains (g)
2.0 kg ha^-1	-------------------------------------- Rates of B (kg ha^-1) --------------------------------------
of Zn	0	1	2	3	4	5
With	293 a	306 ab	330 b	329 b	330 b	305 ab
Without	303 a	308 a	312 a	318 a	315 a	305 a
"F" (rates of B)						0.00
"F" (Zn Fertilization)						0.21
"F" (B x Zn interaction)						0.39
CV%						4.81

Fertilization	Grain yield with 13% grain water content (kg ha^-1)
2.0 kg ha^-1	-------------------------------------- Rates of B (kg ha^-1) --------------------------------------
of Zn	0	1	2	3	4	5
With	9569 aA	10305 abB	11380 bcA	11308 bcA	11586 cA	bcA
Without	9085 aA	9512 aA	10766 bA	10838 bA	11448 bA	11021 bA
"F" (rates of B)						0.00
"F" (Zn Fertilization)						0.01
"F" (B x Zn interaction)						0.52
CV%						4.84

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E-mail: caatinga@ufersa.edu.br

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BORON AND ZINC FERTILIZER APPLICATION TO MAIZE CROPS IN A LITHIC QUARTZIPSAMMENT1 1 Paper extracted from the dissertation masters of the first author

ADUBAÇÃO COM BORO E ZINCO NO CULTIVO DE MILHO EM NEOSSOLO LITÓLICO DISTRÓFICO

ABSTRACT

BORON AND ZINC FERTILIZER APPLICATION TO MAIZE CROPS IN A LITHIC QUARTZIPSAMMENT¹ 1 Paper extracted from the dissertation masters of the first author