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
Claim · model-written summary
The highest corn yield was obtained with 69.08 kg ha-1 of micronutrient-containing fertilizer.
- Taxon
- corn
Zea mays subsp. mayst0
- 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.
Verbatim
t0“corn”
e0“The field study was conducted in Red Latosol in Goiânia, Goiás, Brazil”
e1“The highest yield was obtained when applying 69.08 kg ha-1of micronutrient-containing fertilizer”
e2“a control to which this fertilizer was not applied was used as a reference”
Claim · model-written summary
The soil Zn content remained higher than pre-experiment levels after micronutrient application.
- Taxon
- corn
Zea mays subsp. mayst0
- Outcome
- soil Zn contente3
- Qualifier
- higherthan pre-experiment levelse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“corn”
e3“The soil Zn content remained higherthan pre-experiment levels”
Claim · model-written summary
Corn leaves showed higher micronutrient absorption at sites with high soil Zn content.
- Taxon
- corn
Zea mays subsp. mayst0
- 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.
Verbatim
t0“corn”
e4“Leaf analysis indicatedhigher absorption at the sites with high soil Zn content”
Claim · model-written summary
Micronutrients Mn, Fe, Cu and B had no significant effect on corn yield, leaf nutrition or soil residue.
- Taxon
- corn
Zea mays subsp. mayst0
- 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.
Verbatim
t0“corn”
e2“a control to which this fertilizer was not applied was used as a reference”
e5“The micronutrients Mn, Fe, Cu, and B exhibited no significant effect on corn yield, leaf nutrition, or soil residue”
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