Improving nitrogen management in Québec grain corn

Christine Landry, researcher

Christine Landry

Researcher

418 643-2380
ext 640

Contact Christine Landry

Description

Nitrogen is the main nutrient requirement for corn, and in 2017, 448,000 hectares of grain corn and feed corn were planted in Québec. Current recommendations suggest a nitrogen input of 120 to 170 kg per hectare (Parent and Gagné, 2010), but the current nitrogen dose is closer to 200 kg, and even as much as 240 kg in some cases. This seemingly excessive dose can be attributed to uncertainties about the influence of a number of factors, including climate, soil moisture and drainage, hybrid requirements, crop rotations, tillage, compaction, pH, and subsoil characteristics. Models have been developed based on various parameters to determine the optimal post-emergent nitrogen dose to apply. However, these models are not wholly accurate because they do not take soil health into account. The severity of a soil’s degradation will impact its water content, microbiology, and root development. Thus, it is critical to include this factor in nitrogen management models.

Objective(s)

  • Evaluate the link between soil health and nitrogen fertilization requirements in corn.
  • Assess corn nitrogen uptake under various conditions.
  • Educate and encourage farmers and consultants with regard to nitrogen management.
  • Improve the nitrogen management of grain corn crops in Québec.

From 2019 to 2023

Project duration

Field crops

Activity areas

Fertilizer management

Service

This work will lead to a reduction in the excessive amounts of fertilizer used by some corn growers.

Partner

Groupe PleineTerre

This may interest you

Narrow organic field crops
2019-2023 • Field cropsMarket gardening

Developing a mechanical weeding strategy for narrow-row organic field and vegetable crops

Experimenting narrow-row crop weed control strategy on three crops: green beans, peas, and soybeans.

Researcher: Maryse Leblanc

Read more about the project

Maryse Leblanc
Corn field
2017-2021 • Field crops

Maintaining high yields in field crops while reconsidering the option of using glyphosate

The aim of the project is to assess the impact of applying various rates of glyphosate in field crop systems on the soil and crop rhizosphere microbiome.

Researcher: Richard Hogue

Read more about the project

Richard Hogue
Clover
2015-2017 • Field crops

Impacts of green manure on soil structure in the Estrie region

This project was carried out by Club agroenvironnemental de l’Estrie and IRDA was in charge of conducting the economic analysis.

Researcher: Luc Belzile

Read more about the project

Luc Belzile