The physiological condition of seedl ings is largely responsible for their ability to withstand cold storage and to survive in the field after storage. An investigation was carried out to study the effect of increasing the storage duration from 0 to 6 months at 2°C and of decreasing the storage temperature from 2°C to -9°C on the physiology and survival of Douglas-fir stock. The dormant seedlings used were taken from bare root (2-0) and container (1-0) grown stock of the same coastal provenance which was lifted in mid-December.
Results indicated that an increase of either the storage time or storage temperature was generally associated with a decrease in starch content, seedling dry weight and frost hardiness, and an increase of root and shoot activity during storage, and of bud break and growth rate after storage.
The survival assessment showed that container grown seedlings had a higher tolerance to subfreezing storage while bare root seedlIngs displayed an abrupt decrease in survival after the storage temperature was lowered to sub-freezing.
A copy of the report by Dr. K-W Cheung titled "The effect of storage duration and temperature on the physiology and survival of bare root and container grown Douglas-fir seedlings", is available on loan (in British Columbia only) from the library of the B.C. Forest Service, Legislative Buildings, Victoria, B.C. V8V 1X5
[Abstract contains full text of memo.]
BC Forest Service - Research Division. 1977. The Effect of Storage Duration and Temperature on the Physiology and Survival of Bare Root (2-0) and Container (1-0) Grown Coastal Douglas-fir Seedlings. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Research Memo (FLNRORD). RM13
Topic: FLNRORD Research Program
Keywords: FLNRORD, Research Memo, British Columbia
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