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Thursday, July 9, 2020 | History

3 edition of Influence of date of cone collection on Douglas-fir seed processing and germination found in the catalog.

Influence of date of cone collection on Douglas-fir seed processing and germination

Influence of date of cone collection on Douglas-fir seed processing and germination

a case history

by

  • 229 Want to read
  • 15 Currently reading

Published by Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture in Portland, Or .
Written in English

    Subjects:
  • Douglas fir -- Seeds

  • Edition Notes

    StatementDonald L. Olson, Roy R. Silen.
    SeriesResearch paper PNW -- 190., Research paper PNW -- 190.
    The Physical Object
    Pagination10 p. :
    Number of Pages10
    ID Numbers
    Open LibraryOL17813941M
    OCLC/WorldCa1894726

    seed lowest germination was found in control and soaking period for 20 hours % in 1st week, % in 2nd week while control and soaking for 30 hours % in the 3rd week. Highest shoot growth was observed in mg.L-1 GA3 and 20 hours soaking period cm, seedling showed more . Collection and storage dates and conditions influence germination requirements and early seedling growth (Zasada , Edwards , Winston and Haddon ). A bushel (35 L) of cones, which may contain to cones, yields 6 to 20 ounces ( to g) of clean seed Clade: Tracheophytes.

    The most likely explanation for this was seed respiration. The combined results suggest that dormancy breakage in Douglas fir seeds requires a hydration level sufficient for respiration to take place, and that, after maximal dormancy release, seeds at the highest mc (35–40%) exhaust their food reserves and begin to by: 9. Seed Cone Production Seed cone production is summarized in Table 2. In general, girdling treatments increased seed cone production the following year, with production dropping closer to the level of control trees 2 years after production in l was very poor, with girdled trees producing little more than controls.

    Gilbert SG, Sell HM. Biochemical Changes during Germination of the Tung Seed. Plant Physiol. Nov; 32 (6)– [PMC free article] Stanley RG. Krebs Cycle Activity of Mitochondria from Endosperm of Sugar Pine Seed (Pinus Lambertiana Dougl.). Plant Physiol. Sep; 32 (5)– [PMC free article]Cited by: Green Douglas Fir (Pseudotsuga taxifolia viridis) The Green Douglas Fir can grow 40 to 80 feet tall and feet wide. The Douglas Fir makes an excellent Christmas tree. Works well as a wind-break and a landscaping tree. Soil Type: Prefers well-drained soils in full sun or partial sun. Zones: 6 to 8. Germination Range: %.


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Influence of date of cone collection on Douglas-fir seed processing and germination by Download PDF EPUB FB2

Influence of Date of Cone Collection on Douglas-fir Seed Processing and Germination ­ Abstract Cones were harvested between August 12 and Septemfrom parent trees. Seed weights and germination rose sharply from August 12 to 25 and slowly thereafter.

The early-picked lots. Excerpt from Effect of Date of Cone Collection and Stratification Period on Germination and Growth of Douglas-Fir Seeds and Seedlings Mean rate of germination for each dish was determined by plotting cumulative percentage against days1 on probit paper (campbell and SorensenCited by: 1.

Influence of date of cone collection on Douglas-fir seed processing and germination. Portland, Or.: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, (OCoLC) Material Type: Government publication, National government publication, Internet resource: Document Type: Book, Internet.

Western Hemlock Seed Processing Seed Moisture Content Cone Collection Cone Storage. These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm by: The present study deals with the effect of cone collection date on seed and germination characteristics in blue pine (Pinus wallichiana).

The first cone collection was done on 15 September, second on 30th September, third on 15th October and fourth on 30th October from Gangotri range of Uttarkashi Forest Division of Garhwal Himalaya.

Percentage of viable seeds, per cone increased Author: S. Lavania, Virendra Singh, Birendra Prasad. EFFECT OF DATE OF CONE COLLECTION AND STRATIFICATION PERIOD ON GERMINATION AND GROWTH OF DOUGLAS-FIR SEEDS AND SEEDLINGS by Frank C. Sorensen, Principal Plant Geneticit Abstract Low-elevation seeds collected 6 and 2 weeks before assumed natural seed fall were stratified 1, 2, 4, 8, 16, 32, 64, and days and germinated in the laboratory.

Influence of date of cone collection on Douglas-fir seed processing and germination: a case history / (Portland, Or.: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, ), by Donald F. Olson, Roy R. Silen, and United States Forest Service (page images at HathiTrust).

Seeds collected from a stand at m alt. in the Oregon Cascades (a) 6 wk before, and (b) 2 wk before assumed natural seed fall were stratified for up to days at deg C and germinated in the laboratory.

Seedlings were planted out in a nursery bed and measured for 2 growing seasons: the mathematical relations between stratification and both seedling size and germination rate were Cited by: 1. The effects of reproductive phenology, date of cone harvest, cone storage and seed pretreatment on yield and germination of seeds from a Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] seed orchard were studied.

Flowering phenology (early, intermediate Cited by: 7. Silen, Roy R.: Genetics of Douglas-fir / ([Washington, D.C.]: Dept. of Agriculture, Forest Service, []), also by United States Forest Service (page images at HathiTrust) Silen, Roy R.: Influence of date of cone collection on Douglas-fir seed processing and germination: a case history / (Portland, Or.

Edwards D.G.W., El-Kassaby Y.A. (): Effect of flowering phenology, date of cone collection, cone-storage treatment and seed pretreatment on yield and germination of seeds from a Douglas-Fir seed Cited by: 2. The effects of reproductive phenology, date of cone harvest, cone storage and seed pretreatment on yield and germination of seeds from a Douglas-fir [Pseudotsuga menziesii (Mirb.).

BELCHER, E.W. (): Influence on substrate moisture level on the germination of seed of selected Pinus spp. Preprint 7-SV, 17th ISTA Cong. Warsaw. BELCHER, E.W. (Ed.) (): Small lot forest seed processing workshop, Georgia Forestry Center, Macon, Georgia, 18–20 October Stratification period, sowing date, watering regime, lifting date, and other scheduling may have important but less direct influences on adaptation.

For most seedlots, the risk of poor adaptation caused by nursery practices is probably no greater than risks caused by Cited by: The seeds of C. vergata did not show any significant difference in germination percentage between all evaluated temperatures independent of age. Moreover, regardless of the temperature regime, the old C.

vergata seeds showed a significantly higher germination rate when compared to new seeds. The major difference in germination rate in this species was shown between new (Cited by: 3. Seeds of the Douglas Fir are relatively easy to germinate and grow.

The dormancy within the seed is short and easily broken. This is achieved by a short period of cold stratification in the fridge. You can do this by first soaking the seeds in water for 24 hours. Information on seed collection, handling and germination testing.

(): Economic collection of cones of forest conifers on the basis of preceding estimation of cone crop. In “Seed Processing” Proc. Symposium IUFRO Wkg. Group on Seed Problems, Bergen Vol. J.H. (): Effects of cone-picking date on Douglas-fir seed quality. For. seed germination behavior with respect to dormancy and the factors that influence it (Bradford, ).

There are other inherent difficulties in working with seeds. Events essential for the release from dormancy and the completion of germination may occur only within a relatively few cells associated with the embryonic root axis.

Thus, the Cited by: The Influence of Temperature on Seed Germination in Cultivars of Common Bean Article (PDF Available) in Journal of Experimental Botany 44(12) December with Reads. texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) Genealogy Lincoln Collection.

Books to Borrow. Top American Libraries Canadian Libraries Universal Library Community Texts Project Gutenberg Biodiversity Heritage Library Children's Library. Open Library. Sprouting palm seeds means waiting for six to 10 years for the tree to mature enough to set fruit.

There’s also the little matter of the relatively low 25 percent germination rate, so this method isn’t effective for most growers. For the patient home gardener, however, germinating date palm seeds is an enjoyable and rewarding project. Abstract. Douglas-fir [Pseudotsuga menziesii (Mirb.)Franco] seeds develop with the adaxial surface continuous with the cone scale.

On separation, the scale side of the seed is lighter coloured and flatter than the side not previously in contact with the by: 8.In a study of the problems met in testing germination of coniferous tree seed, special attention is given to the variability between different seedlots of the same species.

Known and suspected causes for this variability are discussed. These include seed source, genetic constitution of individual trees, seed maturity, treatments during the commercial extraction process and storage conditions.