Determining the nitrogen contribution of mulch mineralization in highbush blueberry cultivation so that nitrogen fertilizer applications meet crop requirements more effectively

Christine Landry, researcher

Christine Landry

Researcher, agr., Ph.D.

418 643-2380
ext 640

Contact Christine Landry

Description

In highbush blueberry production, mulch is spread around the base of the plants to suppress weed growth. Some mulches may release nitrogen as they decompose, while others, including fresh sawdust mulch, require the addition of nitrogen fertilizer because soil bacteria mobilize nitrogen to decompose this mulch, given its elevated C/N content. While aged sawdust mulch may supply nitrogen, this contribution has not yet been quantified.

Since the current body of information was generated outside Québec, it is necessary to conduct studies under our own climate conditions. We therefore selected two study sites, one in Montérégie and the other in Chaudière-Appalaches, which will receive no mulch, fresh mulch, and aged mulch blended with four nitrogen doses (0, 30, 60, and 90 kg N/ha). Lastly, this study will determine the nitrogen contribution of mulch mineralization in highbush blueberry cultivation so that mineral nitrogen fertilizer applications can be better tailored to actual crop requirements.

Objective(s)

  • Characterize the nitrogen contribution of sawdust mulch.
  • Survey the literature on the nitrogen requirements of highbush blueberries that maintenance fertilizer applications must satisfy.

From 2019 to 2022

Project duration

Fruit production

Activity areas

Fertilizer management

Service

This project will enable growers to customize their mineral nitrogen fertilizer applications to more effectively meet highbush blueberry crop requirements.

Partners

Ministère de l'Agriculture, des Pêcheries et de l'Alimentation | Groupe Pleine Terre

This may interest you

2019-2022 • Fruit production

A biological strategy to control obliquebanded leafroller in orchards where a codling moth mating disruption program is underway

Biological control of the obliquebanded leafroller in orchards where mating disruption is being used against the codling moth.

Read more about the project

Daniel Cormier
Gérald Chouinard
2014-2017 • Fruit production

Sterile insect release as a biological control method for the spotted wing drosophila: sterilization protocol, competitiveness of irradiated males, and releases in semi-natural conditions

The project consisted of sterilizing spotted wing drosophilas in the laboratory and mass releasing it in crops as a biocontrol method.

Researcher: Annabelle Firlej

Read more about the project

Annabelle Firlej
2017-2019 • Fruit production

Cultural strategies for haskap berries: improving orchard productivity

The aim of this project is to improve the productivity of haskap orchards by promoting more efficient water and nutrient uptake.

Researcher: Carl Boivin

Read more about the project

Carl Boivin