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    Author(s): R.C. Hare; E.B. Snyder; R.C. Schmidtling
    Date: 1977
    Source: In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 11-16
    Publication Series: General Technical Report (GTR)
    Station: North Central Research Station
    PDF: View PDF  (85.33 KB)

    Description

    Biweekly applications of 400 µg GA4/7 plus 25 µg NAA per bud from June 1 to August 10 promoted male and female flowering in longleaf pine (Pinus palustris Mill.), especially when combined with partial branch girdling and NH4N03 fertilization. Fertilization was the most effective single factor, and girdling was second. Cultivation had no significant effect on flowering. Vegetative bud growth was doubled by GA-NAA, independent of fertilizer stimulation.

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    Citation

    Hare, R.C.; Snyder, E.B.; Schmidtling, R.C. 1977. Longleaf pine flowering in response to nitrogen fertilization, branch girdling, growth substances, and cultivation. In: Proceedings of the Thirteenth Lake States Forest Tree Improvement Conference; Gen. Tech. Rep. NC-50. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 11-16

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