Winter cover crops to reduce herbicide inputs in maize crops

  • M.R. Trolove AgResearch, Ruakura Research Centre, PB 3123, Hamilton 3240, New Zealand
  • T.K. James AgResearch, Ruakura Research Centre, PB 3123, Hamilton 3240, New Zealand
  • A.W. Holmes Foundation for Arable Research, 113C Ruakura Road, Ruakura, Hamilton 3240, New Zealand
  • M.D. Parker Foundation for Arable Research, 113C Ruakura Road, Ruakura, Hamilton 3240, New Zealand
  • S.J. McDougall Foundation for Arable Research, 113C Ruakura Road, Ruakura, Hamilton 3240, New Zealand
  • M.R. Pirie AgResearch, Ruakura Research Centre, PB 3123, Hamilton 3240, New Zealand

Abstract

Winter cover crops potentially have a number of positive production and environmental benefits on subsequent maize (Zea mays) crops. A field study was undertaken in 2016/17 to evaluate the effects of winter cover crop residues on the emergence and growth of weeds, required herbicide inputs, and yields of maize in comparison to a winter fallow. Weed ground cover at maize canopy closure was 81–85% less than the winter fallow in plots with ryegrass (Lolium multiflorum), oats (Avena sativa) and gland clover (Trifolium glanduliferum) residues and 57% less in faba bean (Vicia faba). Ryegrass and oats residues maintained ground coverage of >70%, while clover had only 6% at canopy closure, but suppressed weeds similarly. In the absence of herbicides maize silage yields in plots with cover crop residues were similar to those in herbicide treatments, although maize establishment and growth was slower in oats and ryegrass.

Published
2017-07-24
How to Cite
TROLOVE, M.R. et al. Winter cover crops to reduce herbicide inputs in maize crops. New Zealand Plant Protection, [S.l.], v. 70, p. 171-178, july 2017. ISSN 1179-352X. Available at: <http://journal.nzpps.org/index.php/nzpp/article/view/46>. Date accessed: 21 sep. 2017.
Section
Weeds

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.