Graduate Thesis Or Dissertation
 

The effects of low temperatures on dormancy release in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) from western Oregon, Washington, and California

Público Deposited

Contenido Descargable

Descargar PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/p2676x885

Descriptions

Attribute NameValues
Creator
Abstract
  • The effect of low temperatures given at different times and duration upon the time of bud burst, shoot elongation, number of needles developed and needle length in Douglas-fir plants from the Oregon Cascades and three coastal areas ranging from Washington to California were determined. The plants were grown outside in a lathhouse then chilled at 11-day intervals with three temperatures. These treatment combinations were applied early and late in the dormant period. The most effective temperature treatment was 40°F followed by 45° and 50° F, in that order. All three temperatures hastened bud burst for the plants from low elevation as length of chilling increased; however, 45° and 50°F was ineffective when chilling was expanded from 33 to 44 days for the high elevation. If chilling is done early a longer period is required to break dormancy than if done late during the dormant period. Delay of chilling also increased shoot elongation and the number of needles developed remained fairly constant, altering only the needles per centimeter.
Resource Type
Fecha Disponible
Fecha de Emisión
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Declaración de derechos
Publisher
Peer Reviewed
Language
Digitization Specifications
  • PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Relaciones

Parents:

This work has no parents.

En Collection:

Elementos

Miniatura Título Fecha de subida Visibilidad Acciones
file details SuganoAlbertItsuki1971.pdf 2017-08-07 Público Descargar