Charles Karemangingo 1 and Michel Melanson 2
Partner: New Brunswick Wild Blueberry Growers Association
Abstract: This study is intended to determine the blueberry response to different nitrogen fertilizer rates under the mowing and the burning practices. The following nitrogen levels were tested: 0, 25, 50, 75 and 100kg N ha-1 in two sites located in the southeast (for the mowing practice) and southwest for the burning practice) regions of New Brunswick. The results indicate that high N levels contributed to the increase the number of shoots longer than 8cm under the mowing practice. High N levels also contributed to the increase of the total number of buds and number of buds per long shoot whatever the pruning treatment. For both of the two pruning methods, 75kg N ha-1 gave the greatest number of long shoots, the greatest number of buds per long shoot, and the greatest number of total buds per m2. Consequently, 40% and 60% of the buds produced under this N level were born on shoots longer than 15cm under the mowing and the burning practices, respectively.
1 Land Development Branch, New Brunswick Department of Agriculture, Fisheries and Aquaculture, Fredericton, NB, E3B 5H1
2 Agriculture Development Branch, New Brunswick Department of Agriculture, Fisheries and Aquaculture, Fredericton, NB, E3B 5H1