Ecophysiology Of White Spruce Picea Glauca Moench Voss Regeneration

Author : Edward Carter Tear
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.77/5 ( download)

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Download or read book Ecophysiology of White Spruce [Picea Glauca (Moench) Voss] Regeneration written by Edward Carter Tear and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of light and seedbed type were evident for germination success and seedling survival of white spruce [ Picea glauca (Moench) Voss] in the field. Under forest canopy cover, seedbeds of exposed mineral soil had higher rates of germination than seedbeds with competing vegetation removed or on seedbeds with competing vegetation intact. The shade offered by the forest canopy and the seedbed of mineral soil probably maintain adequate soil moisture conditions to allow good germination. Microsites which had mineral soil exposed and which were only partially shaded enhanced white spruce seedling survival. These microsites probably did not experience severe fluctuations in soil moisture content which may be a major cause of seedling mortality in white spruce. Time of year, light and watering do not act independently on retention, distribution or partitioning of recently photoassimilated 14 C02. Seasonal patterns of each are influenced by either light or watering or both. Spruce seedlings grown under water stress or "full-light" conditions retain less 14 C than those seedlings grown under no water stress or grown under low light. The effects of light or watering regime are more pronounced on first-year seedlings than on second-year seedlings. Generally, second-year seedlings translocate a greater percentage of recently assimilated 14 C to the roots than do first-year seedlings. The percent of 14 C translocated to the roots varies with time of year and is affected by the interactive effects of light and watering. Between June and September an increasing proportion of assimilated carbon-14 is channelled into storage rather than into structural components. Deviations from this pattern can occur as a result of changes in light and watering. Xylem pressure potential can be used to estimate white spruce seedling survival. The relationship between xylem pressure potential and survival varied with soil type, probably due to differences in hygroscopic properties. The younger the seedling the more sensitive it is to drying soils.

Author : Steven C. Grossnickle
Publisher : NRC Research Press
ISBN 13 : 9780660179599
Total Pages : 428 pages
Book Rating : 4.98/5 ( download)

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Download or read book Ecophysiology of Northern Spruce Species written by Steven C. Grossnickle and published by NRC Research Press. This book was released on 2000 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual offers foresters information to help them understand the performance of spruce seedlings after being planted on a reforestation site. It was written for university students taking a regeneration silviculture class, and foresters and researchers who work with spruce species.

Author : John C. Zasada
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.3J/5 ( download)

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Download or read book Regeneration of White Spruce, with Reference to Interior Alaska written by John C. Zasada and published by . This book was released on 1969 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.46/5 ( download)

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Download or read book Spatial, Functional and Genetic Characteristics of Field-planted and Naturally-regenerated Populations of White Spruce ([i]Picea Glauca[i] (Moench) Voss). written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The spatial structure of white spruce populations was studied in 52 stands. White spruce tree density increased with age in the 200-year chronosequence after fire. Tree height and DBH peaked at about 120 years after fire. Sapling density along the chronosequence after clearcutting exhibited similar pattern to that after fire, but peaked earlier. White spruce seedlings were present in various densities and heights along the chronosequence after fire, producing uneven-aged stands. Seedling regeneration was mostly on the LFH layer (72%) in younger plots and on logs (97%) in old plots. Seedlings in both regeneration types were evenly spaced at a young age. This pattern changed to random and clumped in older stands. Artificially planted clearcuts formed more even-aged stands. Physiological, morphological and growth responses to sun and shade treatments in the greenhouse were examined in white spruce seedlings collected from three naturally-regenerated (N1, N2 and N3) and three field-planted (P1, P2, and P3) stands. Dark respiration and light compensation points declined by 70 and 81% respectively, in shade- compared to sun-acclimated seedlings. Quantum yield, total chlorophyll content, specific leaf area and absolute water content increased by 45, 33, 32 and 50% respectively, in response to shade treatment. Height was not affected by light regime. Fewer and longer secondary branches were noticed in the shade compared to full sun. At light saturation, populations P1 and N3 showed similar photosynthetic responses under both light regimes (around 6 [mu]mol m-2 s-1). Populations P2, P3 and N2 performed more poorly in the sun than in the shade (8.2, 8.7 and 9.1 in shade, versus 5.1, 4.1 and 5.5 in full sun, respectively). Photosynthetic rate in N1 was greater in full sun than in shade (14.7 and 11.1 [mu]mol m -2 s-1, respectively). Differences in physiological responses to light among populations suggest the presence of more than one ecotype. The variation in physiological an.

Author : Roy Frederick Sutton
Publisher :
ISBN 13 :
Total Pages : 1058 pages
Book Rating : 4.98/5 ( download)

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Download or read book Ecology of Young White Spruce written by Roy Frederick Sutton and published by . This book was released on 1968 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : John C. Zasada
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.1X/5 ( download)

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Download or read book Guidelines for Obtaining Natural Regeneration of White Spruce in Alaska written by John C. Zasada and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gives basic requirements for natural regeneration of white spruce. Also methods for creating conditions to meet these requirements. Based on research on western white spruce forests of Canada.

Author : Everett B. Peterson
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.6G/5 ( download)

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Download or read book Synopsis of Information on White, Engelmann, and Black Spruce Natural Regeneration in North America written by Everett B. Peterson and published by . This book was released on 1994 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report providing a subjective assessment of the scope, applicability, and overall reliability of existing published references related to natural regeneration of white, Engelmann, and black spruce in North America and a synopsis of references on the subject. The references are listed alphabetically by author for each of 563 references, based on a dBASE IV database coded according to 105 keywords. The database allows the user to search geographically, by species of spruce, by forest section within Canada, or by any of the keywords listed. The emphasis is on white spruce in a boreal mixedwood setting but also includes information on natural regeneration of Engelmann spruce and upland black spruce, plus a limited amount of Norway spruce. Most of the references are from the 1990s.

Author : Hans Nienstaedt
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.5N/5 ( download)

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Download or read book Genetics of White Spruce written by Hans Nienstaedt and published by . This book was released on 1972 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Douglas R. Turner
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.01/5 ( download)

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Download or read book Spiral Grain Development in Plantation Grown White Spruce (Picea Glauca [Moench] Voss) written by Douglas R. Turner and published by . This book was released on 2011 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Robert M. Frank
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.3J/5 ( download)

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Download or read book The Course of Growth Response in Released White Spruce written by Robert M. Frank and published by . This book was released on 1973 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weekly bole measurements at 4.5 feet in height were made on individual codominant white spruce trees released on one, two, three, and four sides, and on untreated controls. Results showed that after 10 years annual circumference growth was still significantly related to the degree of release. The growth trend was established the first year but significant differences in annual growth were not evident until the third year. The growth rate reached a maximum during the ninth year. Trees with three and four sides released outgrew controls and trees with one and two sides released by a 2 to 1 ratio. Seasonal growth usually started around May 10, peaked during the second week in June, and ceased around August 20. Trees released on three or four sides appeared to start growing earlier and cease growing several days later than the other trees. The length of the growing season ranged from 100 to 115 days.