Combining slow release and conventional nitrogen fertilizer to reduce leaching and stabilize annual potato yields

Christine Landry, researcher

Christine Landry

Researcher, agr., Ph.D.

418 643-2380
ext 640

Contact Christine Landry

Description

Meeting nitrogen requirements mainly through the use of a highly stable form of fertilizer can minimize nitrogen losses, provide nitrogen amounts closer to the plant’s actual needs, and stabilize or increase potato yields. Using a conventional starter fertilizer makes up for the delay in nitrogen release from the slow release fertilizer in the spring.

Objective(s)

  • Minimize nitrate (NO3) leaching and stabilize yields based on crop nitrogen requirements
  • Determine:
    • What fraction of the plant’s nitrogen requirements should be met by a conventional starter fertilizer
    • Whether overall nitrogen inputs can be reduced
    • Whether all the fertilizer can be applied at planting
  • Determine the effect of the various scenarios on yield, nitrogen uptake, and residual nitrate
  • Compare revenues and costs in the different treatments

From 2017 to 2019

Project duration

Market gardening

Activity areas

Fertilizer management

Service

The fertilization strategy outlined here will help improve crop yields and the environment.

Partners

Growing Forward 2 | Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec - Innov'Action Programme | Agriculture and Agri-Food Canada

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