Monthly Variations in Photosynthetic Rate of Jack Pine Provenances in Relation to their Height
Rates of apparent photosynthesis of ten jack pine (Pinusbanksiana Lamb.) provenances, representing a region from Maine to the Northwest Territories, were measured at monthly intervals from July to November. The trees were 7 years old and 1.4–3.5 m tall.Correlation between rate of apparent photosynth...
| Published in: | Canadian Journal of Forest Research |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1971
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/x71-036 http://www.nrcresearchpress.com/doi/pdf/10.1139/x71-036 |
| Summary: | Rates of apparent photosynthesis of ten jack pine (Pinusbanksiana Lamb.) provenances, representing a region from Maine to the Northwest Territories, were measured at monthly intervals from July to November. The trees were 7 years old and 1.4–3.5 m tall.Correlation between rate of apparent photosynthesis and height depended on time of year at which photosynthetic measurements were made. Before September no correlation was found; after September the tallest provenances had the highest photosynthetic rates. A major exception was the sole maritime provenance studied: its high photosynthetic rate was not matched by good total height growth at Petawawa. |
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