Increment Coring Induced Traumatic Resin Ducts in White Spruce But Not in Lodgepole Pine

2020 ◽  
Vol 76 (1) ◽  
pp. 54 ◽  
Author(s):  
Jennifer G. Klutsch ◽  
Chen X. Kee ◽  
Eduardo P. Cappa ◽  
Blaise Ratcliffe ◽  
Barb R. Thomas ◽  
...  
Keyword(s):  
Lodgepole Pine ◽  
White Spruce ◽  
Resin Ducts ◽  
Traumatic Resin Ducts

Effects of Weevil Feeding on Resin Duct Density and Radial Increment in Lodgepole Pine

1972 ◽  
Vol 2 (1) ◽  
pp. 11-15 ◽  
Author(s):  
H. F. Cerezke
Keyword(s):  
Radial Growth ◽  
Lodgepole Pine ◽  
Radial Increment ◽  
Resin Ducts ◽  
Resin Duct ◽  
Traumatic Resin Ducts

Wood discs cut from 23-year-old lodgepole pine (Pinuscontorta Dougl. var. lalifolia Engelm.) stems were analyzed for vertical and radial resin duct densities adjacent to basal injuries caused by the weevil, Hylobiuswarreni Wood. The injury from single attacks continued for at least 2 years and was characterized by reduced radial growth and an abundance of vertical 'traumatic' resin ducts above the wounds. No increase in radial duct density was detected above the wounds.

scholarly journals Cold hardiness of white spruce, black spruce, jack pine, and lodgepole pine needles during dehardening

2017 ◽  
Vol 47 (8) ◽  
pp. 1116-1122 ◽  
Author(s):  
Rongzhou Man ◽  
Pengxin Lu ◽  
Qing-Lai Dang
Keyword(s):  
Picea Glauca ◽  
Pinus Banksiana ◽  
Cold Hardiness ◽  
Black Spruce ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Visual Assessment ◽  
Jack Pine ◽  
Pine Needles ◽  
Late Winter

Conifer winter damage results primarily from loss of cold hardiness during unseasonably warm days in late winter and early spring, and such damage may increase in frequency and severity under a warming climate. In this study, the dehardening dynamics of lodgepole pine (Pinus contorta Dougl. ex. Loud), jack pine (Pinus banksiana Lamb.), white spruce (Picea glauca (Moench) Voss), and black spruce (Picea mariana (Mill.) B.S.P.) were examined in relation to thermal accumulation during artificial dehardening in winter (December) and spring (March) using relative electrolyte leakage and visual assessment of pine needles and spruce shoots. Results indicated that all four species dehardened at a similar rate and to a similar extent, despite considerably different thermal accumulation requirements. Spring dehardening was comparatively faster, with black spruce slightly hardier than the other conifers at the late stage of spring dehardening. The difference, however, was relatively small and did not afford black spruce significant protection during seedling freezing tests prior to budbreak in late March and early May. The dehardening curves and models developed in this study may serve as a tool to predict cold hardiness by temperature and to understand the potential risks of conifer cold injury during warming–freezing events prior to budbreak.

WEIGHT AND SIZE DISTRIBUTION OF SLASH OF WHITE SPRUCE AND LODGEPOLE PINE

1965 ◽  
Vol 41 (4) ◽  
pp. 432-437
Author(s):  
A. D. Kiil
Keyword(s):  
Size Distribution ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Practical Method ◽  
Graphical Analysis ◽  
Tree Diameter ◽  
West Central ◽  
Pine Trees ◽  
Fine Fuels ◽  
Stand Conditions

A simple and practical method is described for predicting slash weight and proportion of fine fuels. Sixty white spruce and 101 lodgepole pine trees in west central Alberta differing in site and stand conditions were felled, measured and the unmerchantable stem and all branchwood weighed. A graphical analysis showed that the slash weight-merchantable cubic foot ratios for both species varied inversely with tree diameter for the range of diameters sampled. White spruce has a higher slash weight-merchantable cubic foot ratio and a higher proportion of fine fuels than lodgepole pine.

scholarly journals Splitting in Fire-Killed Trees in the Boreal Forest of Alberta

2003 ◽  
Vol 20 (4) ◽  
pp. 167-174
Author(s):  
Nobutaka Nakamura ◽  
Paul M. Woodard ◽  
Lars Bach
Keyword(s):  
Boreal Forest ◽  
Boreal Forests ◽  
Black Spruce ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Balsam Fir ◽  
Crown Fire ◽  
In Fire ◽  
Solar Angle

Abstract Tree boles in the boreal forests of Alberta, Canada will split once killed by a stand-replacing crown fire. A total of 1,485 fire-killed trees were sampled, 1 yr after burning, in 23 plots in 14 widely separated stands within a 370,000 ha fire. Sampling occurred in the Upper and Lower Foothills natural subregions. The frequency of splitting varied by species but averaged 41% for all species. The order in the frequency of splitting was balsam fir, black spruce, white spruce and lodgepole pine. The type of splitting (straight, spiral, or multiple) varied by species, as did the position of the split on the tree bole. Aspect or solar angle was not statistically related to the type or occurrence of splitting.

Sampling Intensity for Estimating Fuel Moisture Content in Lodgepole Pine and White Spruce Trees

1992 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
SJ Titus ◽  
PM Woodard ◽  
AF Johnson
Keyword(s):  
Moisture Content ◽  
Coefficient Of Variation ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Size Class ◽  
Fuel Moisture ◽  
Probability Level ◽  
Content Variation ◽  
Live Biomass ◽  
Fuel Moisture Content

The moisture content of live and dead foliage and roundwood on 30 lodgepole pine and 27 white spruce trees was determinedduring the summer of 1987. Sample trees were selectedrandomly throughout Alberta, Canada, without regard for weather. Five sub-samples were taken for each of the five roundwood diameter size classes (< 0.5cm,0.5 - 1 cm, 1.0- .0cm,3.0- 5.0cm, 5.0-7.0cm and 7.0-10.0 cm). Moisture content of live biomass was quite similar between species for the same fuel size class, regardless of when sampling occurred. Moisture content variation within trees was about half of the variation between trees for the same fuel size class. The coefficient of variation in moisture was much less for live material (generally < 0.3) than for dead biomass (always > 0.6). Average fuel moisture content for populations of lodgepole pine and white spruce trees may be estimated to within + 10% at the 68% probability level by sampling less than 20 trees and with only 3 fuel sub-samples per tree.

DECAY IN WHITE SPRUCE AT THE KANANASKIS FOREST EXPERIMENT STATION

1953 ◽  
Vol 29 (3) ◽  
pp. 233-247 ◽  
Author(s):  
W. B. G. Denyer ◽  
C. G. Riley
Keyword(s):  
Root Rot ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Douglas Fir ◽  
Sample Plot ◽  
Experiment Station ◽  
Forest Experiment Station

1. One hundred and four white spruce were analyzed for decay at the Kananaskis Forest Experiment Station. Lodgepole pine, Douglas fir, and alpine fir occurring on the sample plot with the spruce were also analyzed.2. On a board foot basis, cull in white spruce averaged 12.5 per cent. Percentages of cull in other species were: lodgepole pine 41.7, Douglas fir 28.3, and alpine fir 0.4.3. Gross and net volume tables for white spruce in board feet and total cubic feet are presented.4. POLYPORUS CIRCINATUS var. DUALIS Peck and FLAMMULA CONNISSANS Fr. were the most important causes of root rot and were responsible for 30 per cent of the total decay volume.5. FOMES PINI (Thore) Lloyd and STEREUM SANGUINOLENTUM Alb. & Schw. ex Fr. were the most important causes of trunk rot and were responsible for more than 50 per cent of the total decay volume.

Changes in drought resistance and root growth capacity of container seedlings in response to nursery drought, nitrogen, and potassium treatments

1992 ◽  
Vol 22 (5) ◽  
pp. 740-749 ◽  
Author(s):  
R. van den Driessche
Keyword(s):  
Drought Stress ◽  
Root Growth ◽  
Drought Resistance ◽  
Lodgepole Pine ◽  
Dry Weight ◽  
White Spruce ◽  
Douglas Fir ◽  
Growth Capacity ◽  
Root Growth Capacity ◽  
N Treatment

Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco), lodgepole pine (Pinuscontorta Dougl.), and white spruce (Piceaglauca (Moench) Voss) seedlings, each represented by two seed lots, were grown in Styroblock containers in a greenhouse and plastic shelter house from February 1989 to January 1990. The seedlings were exposed to two nitrogen (N) treatments and three potassium (K) treatments arranged factorially within three drought treatments. After winter storage, seedlings from a complete set of treatments were planted into hygric, mesic, and xeric sand beds during 12–14 March. Increasing nursery drought stress increased survival of Douglas-fir and lodgepole pine after planting, and high N treatment level increased survival of lodgepole pine and white spruce. Under xeric conditions, combined nursery drought and high N treatments increased survival of lodgepole pine by 33%, indicating the importance of nursery cultural regime for stock quality. Increase in nursery drought decreased seedling size relatively little, but increase in N increased seedling size one season after planting. A positive relationship between shoot/root ratio and survival in lodgepole pine and white spruce indicated that increase in N increased both shoot growth and drought resistance over the N range investigated. Only Douglas-fir showed an interaction between drought and N treatment and a small response in both survival and dry weight to K. Root growth capacity, measured at the time of planting, showed an approximate doubling in all species due to high N treatment, and was also increased in white spruce by drought stress. Survival and root growth capacity were poorly correlated, but dry-weight growth in sand beds was well correlated with root growth capacity. Shoot dry weight and percent N in shoots measured after nursery growth were correlated with root growth capacity. Manipulation of root growth capacity by changing nursery treatment was apparently possible without altering resistance to drought stress after planting.

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