PrevostDumaisPlamondon2005

Référence

Prevost, M., Dumais, D., Plamondon, A.P. (2005) Effects of drainage on the growth and nutritive status of a black spruce population of uneven-aged structure : results from 10 years. Forestry Chronicle, 81(4):516-524.

Résumé

We present the 10-year results of a forest drainage experiment conducted in a pre-mature uneven-aged black spruce (Picea mariana [Mill.] BSP) stand, in Bas-Saint-Laurent, Quebec, Canada. The set up included 20, 30, 40, 50 and 60 m ditch spacings, and the data were pooled in three diameter classes, <= 4 cm (small stems), 6-10 cm (medium-size stems) and >= 12 cm (large stems), in order to take into account stand structure in the analysis. The diameter growth of large stems (dominant cover, height similar to 8-12 m) was not improved by drainage. Medium-size stems (intermediate story, similar to 4-8 m) showed a better growth at a 5-10 m distance from the ditches, while small stems (understory similar to 1-4 m) reacted well to drainage, proportionally to ditch closeness. Generally, growth and gain attributable to drainage increased with the live crown ratio, from one third of the total tree height. We did not detect any effect of drainage or distance from the nearest ditch on the nutrient content of the current year foliage of the large stems. For small stems, even the individuals located at 25-30 m from the ditches showed a growth increase compared to the control, although the understory did not benefit from full light conditions. Results suggest that drainage aiming at correcting watering-up following harvesting could permit a rapid growth increase of advance growth.

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@ARTICLE { PrevostDumaisPlamondon2005,
    AUTHOR = { Prevost, M. and Dumais, D. and Plamondon, A.P. },
    TITLE = { Effects of drainage on the growth and nutritive status of a black spruce population of uneven-aged structure : results from 10 years },
    JOURNAL = { Forestry Chronicle },
    YEAR = { 2005 },
    VOLUME = { 81 },
    PAGES = { 516-524 },
    NUMBER = { 4 },
    ABSTRACT = { We present the 10-year results of a forest drainage experiment conducted in a pre-mature uneven-aged black spruce (Picea mariana [Mill.] BSP) stand, in Bas-Saint-Laurent, Quebec, Canada. The set up included 20, 30, 40, 50 and 60 m ditch spacings, and the data were pooled in three diameter classes, <= 4 cm (small stems), 6-10 cm (medium-size stems) and >= 12 cm (large stems), in order to take into account stand structure in the analysis. The diameter growth of large stems (dominant cover, height similar to 8-12 m) was not improved by drainage. Medium-size stems (intermediate story, similar to 4-8 m) showed a better growth at a 5-10 m distance from the ditches, while small stems (understory similar to 1-4 m) reacted well to drainage, proportionally to ditch closeness. Generally, growth and gain attributable to drainage increased with the live crown ratio, from one third of the total tree height. We did not detect any effect of drainage or distance from the nearest ditch on the nutrient content of the current year foliage of the large stems. For small stems, even the individuals located at 25-30 m from the ditches showed a growth increase compared to the control, although the understory did not benefit from full light conditions. Results suggest that drainage aiming at correcting watering-up following harvesting could permit a rapid growth increase of advance growth. },
    KEYWORDS = { diameter growth; foliar analysis; forest drainage; black spruce; Picea mariana; forested peatland WATER-TABLE; MINEROTROPHIC PEATLAND; SUBSTRATE-TEMPERATURE; ALBERTA PEATLANDS; FOREST DRAINAGE; PICEA-MARIANA; BOREAL FOREST; DEPTH; FERTILIZATION; TAMARACK },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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