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.
From 2019 to 2022
This project will enable growers to customize their mineral nitrogen fertilizer applications to more effectively meet highbush blueberry crop requirements.
Ministère de l'Agriculture, des Pêcheries et de l'Alimentation | Groupe Pleine Terre
The objective of this project was to determine whether the addition of two types of organic fertilizers or biostimulants would produce more vigorous plants less subject to decline.
Researcher: Christine Landry
The aim of this project is to measure the potential of automated traps and extrapolate it to an apple-monitoring network.
IRDA is in charge of the economic analysis for this project which purpose is to examine the impact of flower plantings on bumblebee biodiversity in apple orchards in southern Québec.
Researcher: Luc Belzile