Summary
Published in Tree Planters' Notes 57(2): 53-61
A 7-day study of foliar fertilization was carried out after fall budset of containerized 2+0 black spruce (Picea mariana [Mill.] B.S.P.) to assess if one application of urea (U), alone or with surfactant (US), can lead to a rapid increase of foliar nitrogen (N) concentration. Two washing treatments of seedling shoots (W: 15 sec washing [control], WS: W + 5 min soaking) were also performed to evaluate their efficiency to remove urea residues from the needle surface before foliar N concentration analysis. At day 0 (2 hours after application), fertilized seedlings already had significantly greater foliar N concentration than unfertilized seedlings (NF) and after 7 days, it had increased 7 and 12 percent for U and US seedlings, respectively. The addition of a surfactant did not significantly improve N status. Foliar N concentration of fertilized seedlings was not significantly affected by washing treatments. These results indicate that foliar urea fertilization after budset is an effective tool for rapidly increasing foliar N concentration without affecting seedling shoot height.
Sector(s):
Forests
Categorie(s):
Scientific Article
Theme(s):
Forestry Research, Forests, Seeds and Forest Seedlings Production
Departmental author(s):
Author(s)
GAGNON, Jean and Josianne DEBLOIS
Year of publication :
2014
Format :
Paper
How to get the publication :
Keywords :
fertilisation foliaire, urée, azote, plants en récipients, concentration foliaire en azote, épinette noire, picea mariana, production de semences et de plants, article scientifique de recherche forestière, seeds and forest seedlings production, foliar fertilization, urea, nitrogen, containerized seedlings, black spruce, foliar N concentration
