MAIZE AND Urochloa spp. INTERCROPPING MANAGED WITH OR WITHOUT GLYPHOSATE UNDERDOSES

Authors

  • SUZETE FERNANDES LIMA Instituto Federal de Educação, Ciência e Tecnologia Goiano - Câmpus Rio Verde-GO
  • LEANDRO SPÍNDOLA PEREIRA Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde-GO
  • GUSTAVO SILVA DE OLIVEIRA Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde-GO
  • GUSTAVO DORNELAS DE SOUSA Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde-GO
  • PAULO CÉSAR TIMOSSI Universidade Federal de Jataí
  • ADRIANO JAKELAITIS Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde-GO

Keywords:

Urochloa brizantha, Urochloa ruziziensis, weeds, no-tillage system.

Abstract

Evaluation was carried out for the interrelation between maize and
Urochloa brizantha cv. Marandu and Urochloa ruziziensis, with and without
application of glyphosate underdoses, and the effects of this management on
weeds. For each forage species, an experiment was conducted in randomized
block design, with subdivided plots. The main factor consisted of four cropping
systems: intercropping of maize and U. brizantha, treated with 0, 50 and 100 g
a.e. ha-1 of glyphosate, and maize monoculture; and for the intercropping of maize and U. ruziziensis, the doses of glyphosate applied were 25 and 50 g a.e. ha-1. The secondary factor consisted of five evaluation periods, with dry mass of maize and forage plants being measured on the day when the herbicide was applied, 15 days after the application, at full tasseling of maize, in hard farinaceous grain stage, and at maize harvest. Weed density and dry mass were also evaluated.
The intercropping system reduced the density and dry mass production of the
weed community, without affecting the maize yield components. Glyphosate
suppressed the initial growth of U. brizantha and U. ruziziensis intercropped with
maize, at the dose of 100 and 50 g a.e. ha-1, respectively, without compromising straw (residues) formation.

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Published

2020-10-17

How to Cite

LIMA, S. F., PEREIRA, L. S., OLIVEIRA, G. S. D., SOUSA, G. D. D., TIMOSSI, P. C., & JAKELAITIS, A. (2020). MAIZE AND Urochloa spp. INTERCROPPING MANAGED WITH OR WITHOUT GLYPHOSATE UNDERDOSES. REVISTA BRASILEIRA DE MILHO E SORGO, 19, 17. Retrieved from https://rbms.abms.org.br/index.php/ojs/article/view/1121

Issue

Vol. 19 (2020)

Section

Scientific Paper

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