ThiffaultJobidon2006

Référence

Thiffault, N. and Jobidon, R. (2006) How to shift unproductive Kalmia angustifolia - Rhododendron groenlandicum heath to productive conifer plantation. Canadian Journal of Forest Research, 36(10):2364-2376. (Scopus )

Résumé

Conifer-regeneration failure is often observed on sites invaded by ericaceous shrubs. In northeastern Quebec, Canada, these sites are frequently characterized by dense Kalmia angustifolia L. - Rhododendron groenlandicum (Oeder) K.A. Kron & Judd cover. Such failures are potential consequences of nutrient limitation, allelopathy, or low soil temperatures. Conversion of productive forests into heaths poses a threat to the maintenance of forest productivity and biodiversity. We evaluated scarification, spot fertilization, and increased seedling foliar N concentration as treatments to promote planted black spruce (Picea mariana (Mill.) BSP) seedling survival and growth. We measured seedling, vegetation, and soil responses to the treatments for 5 years following planting. Scarification had positive impacts on seedling growth: the differences between scarified and unscarified plots increased over time, and double-pass scarification proved slightly more effective than a single-pass treatment. Responses to scarification were enhanced when seedlings were fertilized. A slow-release fertilizer with micronutrients proved slightly more effective than the 26N-12P-6K formulation; the latter also induced higher mortality than the former or no fertilizer. Gains due to increased N concentrations based on nursery practices were significant but short-lived. Our results demonstrate how silviculture and nursery practices can be used for resetting the secondary succession where ecosystem retrogression is observed following K. angustifolia - R. groenlandicum invasion. © 2006 NRC.

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@ARTICLE { ThiffaultJobidon2006,
    AUTHOR = { Thiffault, N. and Jobidon, R. },
    TITLE = { How to shift unproductive Kalmia angustifolia - Rhododendron groenlandicum heath to productive conifer plantation },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2006 },
    VOLUME = { 36 },
    PAGES = { 2364-2376 },
    NUMBER = { 10 },
    NOTE = { cited By 20 },
    ABSTRACT = { Conifer-regeneration failure is often observed on sites invaded by ericaceous shrubs. In northeastern Quebec, Canada, these sites are frequently characterized by dense Kalmia angustifolia L. - Rhododendron groenlandicum (Oeder) K.A. Kron & Judd cover. Such failures are potential consequences of nutrient limitation, allelopathy, or low soil temperatures. Conversion of productive forests into heaths poses a threat to the maintenance of forest productivity and biodiversity. We evaluated scarification, spot fertilization, and increased seedling foliar N concentration as treatments to promote planted black spruce (Picea mariana (Mill.) BSP) seedling survival and growth. We measured seedling, vegetation, and soil responses to the treatments for 5 years following planting. Scarification had positive impacts on seedling growth: the differences between scarified and unscarified plots increased over time, and double-pass scarification proved slightly more effective than a single-pass treatment. Responses to scarification were enhanced when seedlings were fertilized. A slow-release fertilizer with micronutrients proved slightly more effective than the 26N-12P-6K formulation; the latter also induced higher mortality than the former or no fertilizer. Gains due to increased N concentrations based on nursery practices were significant but short-lived. Our results demonstrate how silviculture and nursery practices can be used for resetting the secondary succession where ecosystem retrogression is observed following K. angustifolia - R. groenlandicum invasion. © 2006 NRC. },
    CODEN = { CJFRA },
    DOCUMENT_TYPE = { Conference Paper },
    DOI = { 10.1139/X06-090 },
    ISSN = { 00455067 },
    KEYWORDS = { Ecosystems; Fertilizers; Seed; Soils, Micronutrients; Retrogression; Single pass treatment, Reforestation, angiosperm; biodiversity; biological invasion; coniferous tree; dicotyledon; fertilizer application; growth response; heathland; plantation forestry; regeneration; scarification; secondary succession; seedling emergence; shrub; silviculture, Ecosystems; Fertilizers; Plantations; Reforestation; Scarification; Seeding; Silviculture; Soil, Canada; North America; Quebec [Canada], Coniferophyta; Kalmia angustifolia; Picea mariana; Rhododendron; Rhododendron groenlandicum },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-33846297325&partnerID=40&md5=c7f2612e17932744c19cf276501fda82 },
}

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