Paper · 2012 · DOAJ (DOAJ: Directory of Open Access Journals)

Micronutrient application and residual effect on corn production in a no-tillage system Aplicação de micronutrientes e seu efeito residual na cultura do milho em sistema plantio direto

Juliano Magalhães Barbosa; Cláudia Fabiana Alves Rezende; Wilson Mozena Leandro; et al.

4
claims
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verbatim quotes
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citations
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research areas
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Open access · cc-by-sa

Abstract

Applying micronutrients to the soilhas a residual effect, reducing the fertilizer applications that are needed under a no-tillage system. The present study determined the residual effect of applying micronutrient-containing fertilizer to soil used for corn production under a no-tillage system. The field study was conducted in Red Latosol in Goiânia, Goiás, Brazil. The experiment was a conducted in a randomized block design with five treatments and four replicates. The fertilizer used in the study contained the micronutrients Mn, Zn, Fe, Cu, and B in powder form and was applied atfour doses (33.33 kg ha-1, 66.66 kg ha-1, 133.32 kg ha-1, and 66.66 kgha-1 plus 1.4 t ha-1 of calcium oxide); a control to which this fertilizer was not applied was used as a reference.The grain yield was measured, and leaf analysis and soil chemical analysis were conducted to evaluate the fertilizer efficiency and residual effect. The soil Zn content remained higherthan pre-experiment levels. Leaf analysis indicatedhigher absorption at the sites with high soil Zn content. The highest yield was obtained when applying 69.08 kg ha-1of micronutrient-containing fertilizer. The micronutrients Mn, Fe, Cu, and B exhibited no significant effect on corn yield, leaf nutrition, or soil residue. A utilização de micronutrientes via solo favorece o seu efeito residual diminuindo as aplicações no sistema plantio direto. O objetivo desse estudo foi determinar o efeito residual da aplicação, via solo, de fertilizantes contendo micronutrientes para cultura do milho cultivado em sistema plantio direto. O trabalho foi realizado a campo em Latossolo Vermelho, em Goiânia, Goiás. O experimento foi conduzido em blocos casualizados com cinco tratamentos e quatro repetições. O fertilizante utilizado na pesquisa contém os micronutrientes Mn, Zn, Fe, Cu e B na forma de pó e foram aplicados em quatro doses (66,66 kg ha-1 mais 1,4 t ha-1 de óxido de cálcio, 33,33 kg ha-1, 66,66 kg ha-1, 133,32 kg ha-1) e tomou-se como referência a testemunha sem a aplicação desse fertilizante. A produtividade de grãos, a análise foliar e a análise química do solo foram realizadas para avaliar a eficiência e o residual do fertilizante. Os teores de Zn se mantiveram elevados no solo em relação aos teores antes da instalação do experimento. Com a análise foliar observou-se uma maior absorção nas parcelas com altos teores de Zn no solo. A maior produtividade foi obtida com a aplicação de 69,08 kg ha-1 do fertilizante contendo micronutrientes em relação à testemunha. Os micronutrientes Mn, Fe, Cu e B não mostraram efeito significativo na produtividade do milho, nutrição foliar e residual no solo.

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Claims 4

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The highest corn yield was obtained with 69.08 kg ha-1 of micronutrient-containing fertilizer.

Treatment
69.08 kg ha-1of micronutrient-containing fertilizere1
Outcome
yielde1
Direction
higheste1
Comparator
controle2
Setting
Goiânia, Goiás, Brazile0

Not reportedValue

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“corn”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
e0

“The field study was conducted in Red Latosol in Goiânia, Goiás, Brazil”

✓ located verbatim in the source · abstract, characters 295–365 · show in text ↑
e1

“The highest yield was obtained when applying 69.08 kg ha-1of micronutrient-containing fertilizer”

✓ located verbatim in the source · abstract, characters 1064–1160 · show in text ↑
e2

“a control to which this fertilizer was not applied was used as a reference”

✓ located verbatim in the source · abstract, characters 696–770 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The soil Zn content remained higher than pre-experiment levels after micronutrient application.

Outcome
soil Zn contente3
Qualifier
higherthan pre-experiment levelse3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“corn”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
e3

“The soil Zn content remained higherthan pre-experiment levels”

✓ located verbatim in the source · abstract, characters 920–981 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Corn leaves showed higher micronutrient absorption at sites with high soil Zn content.

Organ / stage
Leafe4
Compound
Zne4
Outcome
absorptione4
Direction
highere4
Qualifier
high soil Zn contente4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“corn”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
e4

“Leaf analysis indicatedhigher absorption at the sites with high soil Zn content”

✓ located verbatim in the source · abstract, characters 983–1062 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Micronutrients Mn, Fe, Cu and B had no significant effect on corn yield, leaf nutrition or soil residue.

Treatment
micronutrients Mn, Fe, Cu, and Be5
Outcome
corn yield, leaf nutrition, or soil residuee5
Direction
no_changeinferrede5
Comparator
controle2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“corn”

✓ located verbatim in the source · title, characters 49–53 · show in text ↑
e2

“a control to which this fertilizer was not applied was used as a reference”

✓ located verbatim in the source · abstract, characters 696–770 · show in text ↑
e5

“The micronutrients Mn, Fe, Cu, and B exhibited no significant effect on corn yield, leaf nutrition, or soil residue”

✓ located verbatim in the source · abstract, characters 1162–1277 · show in text ↑

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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.