Effects of Temperature, Photoperiod, and Provenance on Growth and Development of Scotch Pine Seedlings

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Abstract:

Growth and development of Pinus sylvestris L. seedlings were determined for 3 photoperiods, 2 temperatures, and 7 seed sources, ranging from Turkey to Germany. (1) Growth and development were affected appreciably by photoperiod, temperature, seed source and their interactions; (2) magnitude of the variation among seed sources appears to justify a more comprehensive evaluation of within-species variation to find suitable variants for plantings in Iowa; (3) photoperiod and temperature appear to be two environmental factors important in the process of natural selection within the species, even over the limited natural range of seed sources studied; and (4) some criteria have been obtained to test the feasibility of early selection of variants for field plantings in Iowa.

Document Type: Journal Article

Affiliations: Professor, Dept. of Forestry, Iowa State University

Publication date: June 1, 1965

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