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Growth and Nutritional Interactions of Nutrient-Loaded Black Spruce Seedlings with Neighboring Natural Vegetation Under Greenhouse Conditions

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Nutrient loading during nursery culture to improve early outplanting performance of black spruce (Picea mariana [Mill.] BSP) seedlings on weed prone sites is increasingly practiced in northern Ontario, but more insight is needed on the competitive mechanisms involved. Vector competition analysis was used to examine nutrient loading on interspecific growth and nutritional interactions between planted seedlings and neighboring natural vegetation under controlled greenhouse conditions. Nutrient loaded and conventional (nonloaded) seedlings were raised in a commercial green-house and then transplanted in bioassay soil substrates retrieved from two forest sites [Hardwood (OG 10) and Feathermoss (OG 4)], with weeds removed or left to grow naturally. Weed control increased seedling growth on the Hardwood substrates (103–194% height increase), but had no effect on the Feathermoss substrates suggesting that no seedling–natural vegetation interactions occurred on the latter site. Nutrient loading, however, countered weed competition on the competition-prone Hardwood site, reflecting the high competitiveness of these seedlings. Vector competition analysis revealed that tree-vegetation interactions on the Hardwood site caused antagonistic nutrient dilution primarily due to competition for N. Nutrient interactions were more symmetric with nutrient-loaded trees, indicating that these seedlings were less sensitive to competition than were nonloaded seedlings. For. Sci. 48(1):77–84.
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Keywords: Bioassay substrates; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; interspecific competition; natural resource management; natural resources; vector competition analysis; vegetation control

Document Type: Miscellaneous

Affiliations: 1: Department of Forestry, Moi University, P.O. Box 1125 Eldoret, Kenya, Phone: +1 (254) 321-63126 [email protected] 2: Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, ON, Canada, M5S 3B3, Phone: +1 (416) 978-6774; Fax +1 (416) 978-3438 [email protected]

Publication date: 2002-02-01

More about this publication?
  • 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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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