scholarly journals Ecological drivers of root grafting in balsam fir natural stands

2020 ◽  
Vol 475 ◽  
pp. 118388
Author(s):  
E. Quer ◽  
V. Baldy ◽  
A. DesRochers
Keyword(s):  
Balsam Fir ◽  
Root Grafting ◽  
Natural Stands

scholarly journals Density Management Diagram for Northeastern Red Spruce and Balsam Fir Forests

1999 ◽  
Vol 16 (1) ◽  
pp. 48-56 ◽  
Author(s):  
Duncan S. Wilson ◽  
Robert S. Seymour ◽  
Douglas A. Maguire
Keyword(s):  
Stand Density ◽  
Maximum Size ◽  
Site Index ◽  
The Self ◽  
Red Spruce ◽  
Balsam Fir ◽  
Stand Development ◽  
Exponential Relationship ◽  
Data Set ◽  
Natural Stands

Abstract A stand-density management diagram is presented for use in northeastern red spruce and balsam fir forests. The diagram was derived from an extensive archived data set collected during the 1970s from fully stocked stands throughout northern Maine and a more recent study of precommercially thinned stands. The negative exponential relationship between mean stemwood volume per tree and stand density, commonly known as the "self-thinning rule, "was formulated to define a biological maximum stand density. The maximum size-density equation can be used to calculate the relative density of any stand and is accurate for thinned and unthinned natural stands as well as plantations. Equations for estimating quadratic mean diameter and stand top height are also derived for unthinned natural stands only. Data used to fit the self-thinning line are substantially above the A-lines on the familiar northeastern stocking guides, suggesting that these guides underestimate maximum density and thus overpredict self-thinning. Examples illustrate how to use the diagram to predict stand development under commercial and precommercial thinning scenarios, as well as natural stand development without thinning. Relevant site index and volume equations are included in an appendix. North. J. Appl. For. 16(1):48-56.

Studies on the Balsam-Fir Seed Chalcid, Megastigmus specularis Walley (Hymenoptera, Chalcididae)

1956 ◽  
Vol 88 (12) ◽  
pp. 691-697 ◽  
Author(s):  
A. F. Hedlin
Keyword(s):  
United States ◽  
New Brunswick ◽  
National Park ◽  
Abies Balsamea ◽  
The United States ◽  
Balsam Fir ◽  
Forest Nursery ◽  
Riding Mountain National Park ◽  
Natural Stands

The balsam-fir seed chalcid, Megastigmus specularis Walley, destroys a high percentage of seeds of balsam fir, Abies balsamea (L.) Mill. The insect was first recorded in Canada in 1928 from New Brunswick and in 1932 was described by Walley (1932). It has been taken in the United States as far west as Minnesota (Peck, 1951). In 1953 the insect was reared from seeds of balsam fir taken at the Forest Nursery Station, Indian Head, Saskatchewan. Further investigations in 1954 showed the insect to be abundant at Indian Head, and also in natural stands of balsam fir in Riding Mountain National Park, Manitoba.

Aboveground Dry Matter of Jack Pine, Black Spruce, White Spruce and Balsam Fir Trees at Two Localities in Ontario

1982 ◽  
Vol 58 (1) ◽  
pp. 26-30 ◽  
Author(s):  
I. S. Alemdag
Keyword(s):  
Dry Matter ◽  
Black Spruce ◽  
White Spruce ◽  
Jack Pine ◽  
Balsam Fir ◽  
Stem Wood ◽  
Natural Stands ◽  
Whole Tree

Standard equations for aboveground ovendry mass of jack pine, black spruce, white spruce, and balsam fir were developed for the components and for the whole tree of single stems grown in natural stands in Ontario. The relationships between the component and the stem wood ovendry masses and those between the ovendry and the green masses were determined. Distribution of ovendry mass within the stem wood of merchantable trees was established. Wood densities were calculated, and comparisons of stem wood ovendry mass were made between the equations developed here and those found in other reports.

scholarly journals Predicting balsam fir mortality in boreal stands affected by spruce budworm

2021 ◽  
Vol 496 ◽  
pp. 119408
Author(s):  
Djidjoho Julien Houndode ◽  
Cornelia Krause ◽  
Hubert Morin
Keyword(s):  
Spruce Budworm ◽  
Balsam Fir

The component composition of planted pine wood cultivated in the boreal zone

2020 ◽  
Vol 35 (4) ◽  
pp. 685-693
Author(s):  
D. A. Danilov ◽  
A. V. Griazkin ◽  
V. A. Sokolova ◽  
I. V. Bacherikov
Keyword(s):  
Component Composition ◽  
Water Soluble ◽  
Boreal Zone ◽  
Lower Content ◽  
Average Yield ◽  
Leningrad Oblast ◽  
Pine Wood ◽  
Natural Stands

AbstractThe present study analyzes the composition of pine wood cultivated on artificial plantations in the Leningrad Oblast (Region). Comparing to pine wood from natural stands, a smaller heartwood zone along the height of the pine trunk and a lower content of resinous substances are noted. The content of cellulose and lignin in the heartwood and sapwood of pine is distributed differently along the trunk. The distribution of pentosans and water-soluble substances in the heartwood and sapwood along the trunk is associated with the lignin complex. The component composition of the studied pine wood from planted stands is quite uniform in its indicators if compared to the wood of older natural stands. Sulphate pulping of planted pine wood showed a higher yield of technical cellulose than the average yield from wood obtained at natural stands of the studied region.

Sign in / Sign up

Export Citation Format

Share Document