DesRochersLieffers2001

Référence

DesRochers, A. and Lieffers, V.J. (2001) Root biomass of regenerating aspen (Populus tremuloides) stands of different densities in Alberta. Canadian Journal of Forest Research, 31(6):1012-1018.

Résumé

In north-central Alberta, 12 plots (9 m2) were hydraulically excavated in young trembling aspen (Populus tremuloides Michx.) stands (5-10 years old) of different sucker density to quantify the effects of sucker density on the parental root system, on the formation of new roots and on the growth of suckers. All roots were collected and divided into live and dead parental roots and new root categories. Size and age of parent roots at the time of suckering were determined. Total biomass ranged from 1 to 18 t/ha of live roots. Living root biomass was proportional to stand density and leaf area index (LAI). Low-density stands had a higher proportion of dead roots. Suckers in plots with more parental root biomass/sucker had greater height growth. Root/shoot ratios ranged from 0.46 to 3.52 but were not correlated with stand densities. Stands with larger basal area of suckers and greater mean parent root diameter produced more biomass of new roots. This research suggests that young sucker-origin aspen stands support a large underground biomass and that high sucker densities and LAI are required to prevent loss of parental root biomass.

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@ARTICLE { DesRochersLieffers2001,
    AUTHOR = { DesRochers, A. and Lieffers, V.J. },
    TITLE = { Root biomass of regenerating aspen (Populus tremuloides) stands of different densities in Alberta },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2001 },
    VOLUME = { 31 },
    PAGES = { 1012-1018 },
    NUMBER = { 6 },
    NOTE = { 00455067 (ISSN) Cited By (since 1996): 13 Export Date: 27 April 2007 Source: Scopus CODEN: CJFRA doi: 10.1139/cjfr-31-6-1012 Language of Original Document: English Correspondence Address: DesRochers, A.; Alberta-Pacific Forest Indust. Inc.; P.O. Box 8000 Boyle, AB T0A 0M0, Canada; email: desrocan@alpac.ca References: Barnes, B.V., The clonal growth habit of American aspens (1966) Ecology, 47, pp. 439-447; Beckingham, J.D., Archibald, J.H., Field guide to ecosites of northern Alberta (1996) Alta. Spec. Rep. 5, , Canadian Forest Service, Northwest Region, Northern Forestry Centre, Edmonton; Brown, A.B., Cambial activity, root habit and sucker shoot development in two species of poplar (1935) New Phytol., 34, pp. 163-179; Corns, G.W., Maynard, D.G., Effects of soil compaction and chipped aspen residue on aspen regeneration and soil nutrients (1998) Can. J. Soil Sci., 78, pp. 85-92; DeByle, N.V., Detection of functional intraclonal root connections by tracers and excavation (1964) For. Sci., 10, pp. 386-396; DeLong, H.B., Lieffers, V.J., Blenis, P.V., Microsite effects on first-year establishment and overwinter survival of white spruce in aspen-dominated boreal mixedwoods (1997) Can. J. For. Res., 27, pp. 1452-1457; DesRochers, A., Lieffers, V.J., Structural root system of mature aspen (Populus tremuloides) in declining stands in Alberta, Canada (2001) J. Veg. Sci., , In press; Farmer, R.E., Aspen root sucker formation and apical dominance (1962) For. Sci., 8, pp. 403-410; Gifford, G.F., Aspen root studies on three sites in northern Utah (1966) Am. Midl. Nat., 75, pp. 132-141; Hungerford, R.D., Soil temperatures and suckering in burned and unburned aspen stands in Idaho (1988) USDA For. Serv. Res. Note INT-378; Johnstone, W.D., Peterson, E.B., Above-ground component weights in Alberta Populus stands (1980) Can. For. Serv. North For. Res. Cent. Inf. Rep. NOR-X-226; Kozlowski, T.T., Carbohydrate sources and sinks in woody plants (1992) Bot. Rev., 58, pp. 107-222; Landha?usser, S.M., Lieffers, V.J., Growth of Populus tremuloides in association with Calamagrostis canadensis (1998) Can. J. For. Res., 28, pp. 396-401; Lieffers, V.J., Messier, C., Stadt, K.J., Gendron, F., Comeau, P.G., Predicting and managing light in the understory of boreal forests (1999) Can. J. For. Res., 29, pp. 796-811; Maini, J.S., Horton, K.W., Vegetative propagation of Populus spp. I. Influence of temperature on formation and initial growth of aspen suckers (1966) Can. J. Bot., 44, pp. 1183-1189; Peterson, E.B., Peterson, N.M., Ecology, management, and use of aspen and balsam poplar in the Prairie Provinces (1992) Alta. Spec. Rep. 1, , Forestry Canada, Northwest Region, Edmonton; Pollard, D.F.W., Above-ground dry matter production in three stands of trembling aspen (1972) Can. J. For. Res., 2, pp. 27-33; Ruark, G.A., Bockheim, J.G., Below-ground biomass of 10-, 20-, and 32-year-old Populus tremuloides in Wisconsin (1987) Pedobiologia, 30, pp. 207-217; Sandberg, D., (1951) The regeneration of quaking aspen by root suckering, , M.Sc. thesis, University of Minnesota, Minneapolis; Schier, G.A., Deterioration of aspen clones in the middle Rocky Mountains (1975) USDA For. Serv. Res. Pap. INT-170; Schier, G.A., Sucker regeneration in some deteriorating Utah aspen stands: Development of independent root systems (1982) Can. J. For. Res., 12, pp. 1032-1035; Schier, G.A., Campbell, R.B., Aspen sucker regeneration following burning and clearcutting on two sites in the Rocky Mountains (1978) For. Sci., 24, pp. 303-308; Schier, G.A., Zasada, J.C., Role of carbohydrate reserves in the development of root suckers in Populus tremuloides (1973) Can. J. For. Res., 3, pp. 243-250; Shepperd, W.D., The effect of harvesting activities on soil compaction, root damage, and suckering in Colorado aspen. West (1993) J. Appl. For., 8, pp. 62-66; Shepperd, W.D., Initial growth, development, and clonal dynamics of regenerated aspen in the Rocky Mountains (1993) USDA For. Serv. Res. Pap. RM-312; Shepperd, W.D., Smith, F.W., The role of near-surface lateral roots in the life cycle of aspen in the central Rocky Mountains (1993) For. Ecol. Manag., 61, pp. 157-170; Stoeckeler, J.H., Macon, J.W., Regeneration of aspen cutover areas in northern Wisconsin (1956) J. For., 54, pp. 13-16; Strong, W.L., La Roi, G.H., Root-system morphology of common boreal forest trees in Alberta, Canada (1983) Can. J. For. Res., 13, pp. 1164-1173; Strong, W.L., Leggat, K.R., (1992) Ecoregions of Alberta, , Alberta Forestry, Lands and Wildlife, Edmonton; Zahner, R., DeByle, N.V., Effect of pruning the parent root on growth of aspen suckers (1965) Ecology, 46, pp. 373-375. },
    ABSTRACT = { In north-central Alberta, 12 plots (9 m2) were hydraulically excavated in young trembling aspen (Populus tremuloides Michx.) stands (5-10 years old) of different sucker density to quantify the effects of sucker density on the parental root system, on the formation of new roots and on the growth of suckers. All roots were collected and divided into live and dead parental roots and new root categories. Size and age of parent roots at the time of suckering were determined. Total biomass ranged from 1 to 18 t/ha of live roots. Living root biomass was proportional to stand density and leaf area index (LAI). Low-density stands had a higher proportion of dead roots. Suckers in plots with more parental root biomass/sucker had greater height growth. Root/shoot ratios ranged from 0.46 to 3.52 but were not correlated with stand densities. Stands with larger basal area of suckers and greater mean parent root diameter produced more biomass of new roots. This research suggests that young sucker-origin aspen stands support a large underground biomass and that high sucker densities and LAI are required to prevent loss of parental root biomass. },
    KEYWORDS = { Sucker density Biomass belowground biomass density forest Populus Roots Canada },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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