Results 121 to 130 of about 382,176 (172)

Transgenic Black Spruce (Picea mariana)

2000
Black spruce (Picea mariana) is one of about 40 species of the genus Picea A. Dietr. (family Pinaceae) scattered throughout the cooler parts of the north temperate zone and higher elevations in the south (Farrar 1995). Alone or with white spruce and tamarack [Larix laricina (Du Roi) K. Koch], black spruce forms the northern boundary of tree-form growth.
L. Tian, A. Séguin, R. G. Rutledge, P. J. Charest   +3 more
openaire   +1 more source

Growth Response of Picea mariana Seedlings to Competition for Radiation

Scandinavian Journal of Forest Research, 2000
The growth response of 4-year-old black spruce seedlings (Picea mariana (Mill.) B.S.P.) to reduced radiation availability (DIFN) caused by herbaceous and woody competitors was investigated on a clay and on a loam site on a research plot in Ontario, Canada.
Ralf Küßner, Phillip E. Reynolds, F. Wayne Bell   +2 more
openaire   +1 more source

Differences in crown characteristics between black (Picea mariana) and white spruce (Picea glauca)

Canadian Journal of Forest Research, 2012
Black spruce ( Picea mariana (Mill.) Britton, Sterns & Poggenb.) and white spruce ( Picea glauca (Moench) Voss) are phylogenetically proximal species that differ in productivity. Crown characteristics of these two species have not been extensively studied, in spite of the importance of these two species to the Canadian boreal forest and the ...
Hugues Power, Valerie LeMay, Frank Berninger, Derek Sattler, Daniel Kneeshaw   +4 more
openaire   +1 more source

A NEW GENUS OF PHACIDIACEAE ON PICEA MARIANA

Canadian Journal of Botany, 1963
A new phacidiaceous genus, Micraspis, is erected to accommodate a single species, M. acicola, on Picea mariana (Mill.) B.S.P. from Northern Ontario. Its probable conidial state is described as Periperidium acicola gen. et sp. nov.
openaire   +1 more source

The Ureolytic Microflora in a Black Spruce (Picea mariana Mill.) Humus

Soil Science Society of America Journal, 1967
Abstract The total and the ureolytic microflora in black spruce humus from an untreated plot and from a plot fertilized with 450 kg urea‐N per ha (400 lb N per acre) 2 years before sampling was studied using incubation tests. Following the addition of 3,500 ppm of urea‐N in the laboratory the total numbers of bacteria and fungi ...
M. R. Roberge, R. Knowles
openaire   +1 more source

Somatic Embryogenesis in Picea Mariana (Mill.)

1995
Black spruce (Picea mariana (Miller)) is one of seven spruce species native to North America. Its natural distribution extends from Labrador to Alaska and southward to New York, Minnesota, and Montana. The wood of Picea mariana is of great economic importance because of its wide use in the manufacture of paper pulp.
openaire   +1 more source

Layering in Black Spruce (Picea mariana (Mill.) BSP.)

American Midland Naturalist, 1938
The general appearance is that of an older tree surrounded at the base with a fringe of small trees. A few instances have been noted where a tall central tree is surrounded by medium height trees close to it and those in turn by a fringe of smaller trees. (Figs.
openaire   +1 more source

White Spruce [Picea glauca (Moench) Voss] and Black Spruce [Picea mariana (Mill) B.S.P.]

1991
The genus Picea, the spruces, is a member of the family Pinaceae, the largest family of conifers. There are about 40 species of spruce (Safford 1974), found principally in north temperate regions of Europe, Asia, and North America. Picea glauca (Moench) Voss (white spruce), and Picea mariana (Mill) B.S.P.
S. M. Attree, D. I. Dunstan, L. C. Fowke
openaire   +1 more source

Remote sensing of biophysical variables in boreal stands of Picea mariana

1995 International Geoscience and Remote Sensing Symposium, IGARSS '95. Quantitative Remote Sensing for Science and Applications, 2002
Using two hybrid radiative transfer models to represent conifer canopies and stands the authors develop and evaluate algorithms to infer several important structural parameters of stands of black spruce (Picea mariana), the most common boreal forest dominant.
F.G. Hall, D.R. Peddle, E.F. LeDrew
openaire   +1 more source

Evaluation of black spruce (Picea mariana) as a bioindicator of aluminum contamination

Water, Air, & Soil Pollution, 1993
The aim of this work is to evaluate black spruce (Picea mariana) as an indicator of environmental aluminum contamination. The territory studied extends to a radius of 100 km around the Alcan aluminum refinery in Jonquiere, Quebec, Canada. Samples of wood were taken from the trunks of trees at 26 sites at distances of 5, 10, 20, 30, 40, 50 and 100 km ...
M. Dion, S. Loranger, G. Kennedy, F. Courchesne, J. Zayed   +4 more
openaire   +2 more sources