Mats Hannerz 
Predicting the risk of frost occurrence after budburst of Norway spruce in Sweden.
Hannerz M. (1994). Predicting the risk of frost occurrence after budburst of Norway spruce in Sweden. Silva Fennica vol. 28 no. 4 article id 5535. https://doi.org/10.14214/sf.a9175
Abstract
Temperature sums required for budburst in various Norway spruce (Picea abies (L.) H. Karst.) provenances were determined, and weather statistics were then used to predict the risk of potentially damaging frosts at 11 locations in Sweden. Frost risk was quantified as the probability of a frost occurring within 100 day-degrees (two weeks) after budburst. The examples provided show that a spruce seedling from central Sweden has to sustain almost twice as many frost occassions as a seedling from Belorussia, when planted in southern and central Sweden. The method presented here can be used for mapping early summer frost risk in Sweden and for supporting provenance transfer guidelines.
Keywords
Norway spruce;
Picea abies;
Sweden;
provenances;
budburst;
frost;
developmental stages;
heat sums
Published in 1994
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Available at https://doi.org/10.14214/sf.a9175 | Download PDF
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