Efeito da adubação de nitrogênio na cultura do milho (Zea mays) comparado entre os dois híbridos
Efeito da adubação de nitrogênio na cultura do milho (Zea mays) comparado entre os dois híbridos
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DOI: https://doi.org/10.22533/at.ed.96624300412
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Palavras-chave: adubação nitrogenada, híbridos de milho, produtividade, recuperação eficiente aparente do N absorbido
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Keywords: apparent efficient recuperation of nitrogen absorption, corn, hybrids, nitrogen fertilization, yield
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Abstract: The author carried out various research for corn culture on Panama, Brazil, Paraguay and Ecuador as a basic crop. On the article, it is explained the obtained results in Paraguay with the Latin American companions. At Pilar city in Paraguay, it carried out an investigation to determine the variation on corn crop yield, the hybrids TNH0032100 and TNH0033100, from different levels of nitrogen fertilization on an Entisol. It was evaluated four levels of N (0, 50, 100 and 200kgN/ha) combined with two hybrids at random with three replications on corn where it was used the experiment design in split plots. From the results of analysis of variance, it was showed significant difference at 1% for these hybrids, and it was also obtained highly significant difference at 1% levels N applied to the crop on the percentage of crude protein in the grain. Yield and % of crude protein for hybrid TNH0032100 were superior to those for hybrid TNH0033100. Therefore, it is recommended that the hybrid TNH0032100 culture in the field. From the results obtained on the efficient recovery of apparent N in the treatment of 50kgN/ha was 38,3% in the hybrid TNH0032100, with leaching and/or volatilization of this element inside the crop. On the other hand, it is considered the nitrogen release from the soil organic matter (1,56%) by the mineralization by microbial activity within the corn crop culture. On the experiment, it carried out the N application at sowing, 30 and 60 days after sowing. It was determined 50kgN/ha as an economic application for the hybrid TNH 0032100.
- Kentaro Tomita