Evaluation of sources and rates of P fertilizers on the initial growth of corn

Authors

  • Nelson Harger Universidade Estadual de Londrina
  • Osmar R. Brito Universidade Estadual de Londrina
  • Ricardo Ralisch Universidade Estadual de Londrina
  • Fábio Rogério Ortiz Empresa Brasileira de Pesquisa Agropecuária
  • Toshio Sérgio Watanabe Grupo de Desenvolvimento de Tecnologias

DOI:

https://doi.org/10.5433/1679-0359.2007v28n1p39

Keywords:

Zea mays, Phosphate fertilization, Acidified phosphates, Natural reactive phosphates.

Abstract

Phosphorus is an essential element for all living organisms and important also for agricultural production. The content of P in most agricultural soils in Brazil is low. In order to supply the plant needs and the soil fixation, application of P fertilizer is required. Among the various options of P fertilizers in the market, the totally acidified phosphates are usually commercialized. The evaluation of the efficiency of the reactive natural phosphates as P fertilizers is important due to the increase of the utilization of cheaper sources of natural P. The experiment was carried out in green house, using a Nitossolo. The experimental design used was complete randomized design, with the treatments in a 4x2 factorial arrangement, and four replications. The objective of the experiment was to evaluate the effects of sources and rates of P on the growth of corn. The production of dry matter and the content of P on the corn leave and stalks (above ground corn parts) increased as rates of P increased, regardless the P sources tested. However, the Triple Super Phosphate was more efficient compared with Arad phosphate, providing better nutrition and initial growth of corn plants.

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Author Biographies

Nelson Harger, Universidade Estadual de Londrina

Doutorando do Programa de Pós-Graduação em Agronomia – UEL. Eng. Agrônomo, M Sc. Implementador Regional da Emater Pr.

Osmar R. Brito, Universidade Estadual de Londrina

Professores do Dep. de Agronomia, UEL. CP 6001, CEP. 86.051-990. Londrina.

Ricardo Ralisch, Universidade Estadual de Londrina

Professores do Dep. de Agronomia, UEL.

Fábio Rogério Ortiz, Empresa Brasileira de Pesquisa Agropecuária

M Sc., Assistente de Pesquisa, Embrapa Soja.

Toshio Sérgio Watanabe, Grupo de Desenvolvimento de Tecnologias

Eng. Agrônomo, M Sc. Coordenador técnico do GDT de Mauá da Serra – Pr.

Published

2007-07-30

How to Cite

Harger, N., Brito, O. R., Ralisch, R., Ortiz, F. R., & Watanabe, T. S. (2007). Evaluation of sources and rates of P fertilizers on the initial growth of corn. Semina: Ciências Agrárias, 28(1), 39–44. https://doi.org/10.5433/1679-0359.2007v28n1p39

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