Notes: Effects of Shaking and Shading on Growth of Three Hardwood Species

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Manual shaking of greenhouse-grown black walnut, sweetgum, and silver maple seedlings daily for 30 seconds reduced height growth within a few days after shaking treatments were started. With the exception of black walnut, stem diameter, dry weight accumulation, and leaf area during a 50- to 60-day period were not significantly affected, which suggests strongly that shaking primarily affects endogenous processes rather than directly affecting photosynthesis. Heavy shading reduced all aspects of the growth of the seedlings, but in most cases did not alter the responses to the shaking treatments. Forest Sci. 25:212-216.

Keywords: Acer saccharinum; Juglans nigra; Liquidambar styraciflua; stem movement

Document Type: Miscellaneous

Affiliations: Principal Plant Physiologist, USDA Forest Service, North Central Forest Experiment Station, Carbondale, Illinois

Publication date: June 1, 1979

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  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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