Organisation du système racinaire du chêne pédonculé (Quercus robur) développé en conditions édaphiques non contraignantes (sol brun lessivé colluvial)

Lucot, Éric; Bruckert, S.

doi:10.1051/forest:19920503

Cited by 15 publications

(7 citation statements)

References 3 publications

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“…In the present study, results were expressed as mean daily transpiration (mm day-l), by taking into account the trees sapwood area per unit of soil surface area (17.5 m 2 ha-l). The exponential decline in root densities with depth has been commonly described (B~drneau and Auclair, 1989), and was in good agreement with the observations of Lucot and Bruckert (1992) on pedunculate oak growing on a deep colluvial soil. to the root system architecture.…”

Section: Soil Water Contentsupporting

confidence: 88%

“…Because both species lay close together (inside a 5 m square), the patterns of water uptake during the drying cycle were not analysed separately for each species. On moist soils without limiting factors such as rock or a solidified soil level, a rooting depth of 1 to 5 meters has been reported by work carried out in Czechoslovakia cited by Cermak et al (1980), or more recently by Lucot and Bruckert (1992). The wettest profile was observed on May 13, but also during other years in spring after drainage, so we assumed to be the field capacity.…”

Section: Soil Water Profiles and Water Uptake During An Increasing Drmentioning

confidence: 83%

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Soil water dynamics in an oak stand

et al. 1995

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Section: Soil Water Contentsupporting

confidence: 88%

Section: Soil Water Profiles and Water Uptake During An Increasing Drmentioning

confidence: 83%

Soil water dynamics in an oak stand

et al. 1995

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“…Though the soil horizons are dense at depth > 0.45 m, roots were observed down to 1.6 m, as also reported by Abrams (1990), Bre´da (1994), Dawson (1996), Hanson and Weltzin (2000), Lebourgeois and Jabiol (2002), Schmull and Thomas (2000). As the surface soil horizons dessicate, plant water uptake may preferentially occur in deeper horizons in order to attenuate the duration and intensity of water stress, even if only few deep roots are present (Lucot and Bruckert, 1992;Lucot et al, 1995;Penuelas and Filella, 2003). These deep fine roots probably act only during a short period (end of summer), when oxygen supply is sufficient, i.e., when shrinkage occurs.…”

Section: Assessment Of Available Water: Methodological Aspectsmentioning

confidence: 99%

“…These functions cannot be used for forest soils because they have different properties. They usually have larger C contents than agricultural soils (Badeau et al, 1999;Jamagne et al, 1977), and exhibit a large heterogeneity in pore size (Lucot and Bruckert, 1992). Also, the FC and WP potential values are not adapted to the extraction capacity of trees (Bre´da et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Porosity and available water of temporarily waterlogged soils in a Quercus robur (L.) declining stand

Vincke

Delvaux²

2005

Plant Soil

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Pedunculate oak (Quercus robur L.) is particularly sensitive to decline in clayey soils presenting a highperched temporary water table. These soils induce two successive constraints in one-year cycle: water excess (and hypoxy) in winter and early spring, and water shortage in summer (water stress being more restrictive to oak). We determined the porosity and water properties of temporarily waterlogged clayey soils supporting forest stands of declining Quercus robur trees in a 101 yr-old oak stand in Belgium (50°06 0 N, 4°16 0 E). Roots unevenly colonized the soil down to 1.6 m: fine roots (diameter < 5 mm) were mostly distributed on the surface horizons (0-0.3 m) and around 1.3 m deep, despite dense clayey horizons appearing at 0.35 m depth. Clay content below this depth reached 46-51%. Illite and vermiculite were the dominant clay minerals. The clayey horizons exhibited marked shrink-swell properties: bulk density at 30 kPa increased from 1.41 to 1.88 g cm )3 from the surface to 2 m depth. There was also evidence of hypoxic conditions caused by water saturation of pore space in the rooting zone from October to mid-April. Extractable water (EW), calculated between moisture tensions of 5 and 1600 kPa was 152.8 mm. The level of perched temporary water table strongly depended on the seasonal rhythm of water uptake by trees and on the shrink-swell behaviour of soil.Abbreviations: EW -Extractable water (mm); FC -Field capacity; MT -Moisture tension (kPa); PETPotential evapotranspiration (mm); REW -Relative extractable water; W -Gravimetric soil water content (g g )1 ); WP -Wilting point; Y 0 -Predawn leaf water potential (kPa)

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“…Although the strong root system of oaks can reach into deep soil layers, the main root biomass occurs in upper soil horizons. An analysis of two 150-yearold pedunculate oaks done by Lucot and Bruckert (1992) also demonstrated that the root system had two clearly defined parts: a superficial system at a depth of 0-60 cm and a deep root system reaching below 60 cm. The density of the superficial root system was higher inside a circle of 3 m in diameter from the stem and some roots reached as far as to a distance of 20 m from the stem.…”

Section: Discussionmentioning

confidence: 97%

The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands

Mauer¹,

Houšková²,

Mikita³

2017

J. For. Sci.

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Mauer O., Houšková K., Mikita T. (2017): The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands. J. For. Sci., 63: 22-33.The paper aims to contribute to the determination of reasons causing the irregular growth of young pedunculate oaks occurring at the margins of naturally and artificially regenerated plots neighbouring with adult stands on alluvial sites. It presents analyses of aboveground biometric parameters, mortality, root system architecture of young trees, root density in the soil profile, global solar radiation and soil moisture content in dependence on the location of oaks at the northern, southern, eastern or western margins of the regenerated area and on the distance from the stand margin. The highest impact of the neighbouring adult stand is always recorded on the margin of the regenerated plot while its effect is weakening towards the plot centre, and fading away ca. 7 m behind the crown projection of adult trees. Regardless of the oak location (northern, southern, eastern or western margin), the cause is a high root density of marginal trees of the adult stand, which induces the critical lack of water under their crown projections.

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Organisation du système racinaire du chêne pédonculé (Quercus robur) développé en conditions édaphiques non contraignantes (sol brun lessivé colluvial)

Cited by 15 publications

References 3 publications

Soil water dynamics in an oak stand

Soil water dynamics in an oak stand

Porosity and available water of temporarily waterlogged soils in a Quercus robur (L.) declining stand

The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands

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