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    Author(s): Keith F. Jensen; Leon S. Dochinger
    Date: 1979
    Source: Res. Pap. NE-442. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.
    Publication Series: Research Paper (RP)
    Station: Northeastern Research Station
    PDF: View PDF  (660.87 KB)

    Description

    Height growth of silver maple, white ash, yellow-poplar, sycamore, eastern cottonwood, and white spruce seedlings was not significantly influenced by 0.15 ppm SO2 for 8 hours/day, 5 days/week. A fumigation treatment of 0.25 ppm SO2 for 8 hourd/day, 5 days/week did not significantly affect height growth of black alder, yellow-poplar and white spruce seedlings but significantly reduced the height growth of eastern cottonwood, green ash, and sycamore seedlings. Exposure to toxic concentrations of SO2 (1 to 4 ppm) for 2 to 8 hours significantly affected the height growth and caused leaf injury in silver maple and yellow-poplar seedlings. Growth was only suppressed for 14 days after the toxic fumigation because by that time new leaves had formed and normal growth had resumed.

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    Citation

    Jensen, Keith F.; Dochinger, Leon S. 1979. Growth responses of woody species to long- and short-term fumigation with sulfur dioxide. Res. Pap. NE-442. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 7p.

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