Etudes racinaires au sein du programme "croissance" de l'INRA (quercus petraea et pi nus pinaster)

Colin, François; Danjon, Fréderic; Wehrlen, Léon

doi:10.4267/2042/26709

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…Large root systems can be uprooted with a mechanical shovel fitted with a large bucket or a long tooth (e.g. Colin et al 1995). Danjon et al (2005) described a study where five people could uproot and clean twenty-four 40 cm mean diameter at breast height (DBH) Pinus pinaster Ait.…”

Section: Measurementsmentioning

confidence: 98%

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Assessing and analyzing 3D architecture of woody root systems, a review of methods and applications in tree and soil stability, resource acquisition and allocation

2007

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In numerous studies dealing with roots of woody plants, a description of the root system architecture is needed. During the twentieth century, several manual measurement methods were used, depending on the objectives of study. Due to the difficulties in accessing the roots and the duration of measurements, the studies generally involved a low number of root systems, were often qualitative and focused only on one specific application. Quantitative methods in plant architecture were largely developed in the last 40 years for aerial architecture. However, root systems have particular features and often need specific procedures. Since the end of the 1990s, new devices and techniques have been available for coarse root architecture measurements including volume location techniques (noninvasive or destructive) and manual or semi-automatic 3D digitising. Full 3D root system architecture dynamics was also reconstructed from partial measurements using modelling procedures. On the one hand, noninvasive and automatic techniques need more development to obtain full 3D architecture, i.e. geometry and topology. On the other hand, both one inexpensive manual and one semi-automatic digitizing procedure are now available to measure precisely and rapidly the full 3D architecture of uprooted and excavated coarse root systems. Specific software and a large number of functions are also available for an in-depth analysis of root architecture and have already been used in a dozen of research papers including a fairly large sample of mature trees. A comprehensive analysis of root architecture can be achieved by classifying individual roots in several root types through architectural analysis. The objective of this paper is both to give a detailed overview of the state of the art techniques for 3D root system architecture measurement and analysis and to give examples of applications in this field. Practical details are also given so that this paper can be used as a sort of manual for people who want to improve their practice or to enter this quite new research field.

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Section: Measurementsmentioning

confidence: 98%

“…Lastly, 3D cross-sectional area (CSA) root architecture manual measurements were used by e.g. Colin et al (1995), Drexhage et al (1999), Sundström and Keane (1999) and Nieuwenhuis and Wills (2002). This provides information mainly on root volume spatial distribution.…”

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confidence: 99%

Assessing and analyzing 3D architecture of woody root systems, a review of methods and applications in tree and soil stability, resource acquisition and allocation

2007

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“…In 1997 four dominant trees were felled leaving a I-m-high stump for the extraction of the root system (cf. Colin et al, 1995;Drexhage et aI., 1999). Stem and root system dimensions are given in Table 1.…”

Section: Site Details and Extraction Of The Treesmentioning

confidence: 98%

“…An advanced breeding program was started in 1960, aiming at providing improved seed material. Trees have been selected for height growth and stem straightness by plus tree selection followed by two cycles of recurrent selection (Danjon, 1995). Such an improved population has been available commercially since 1985, and its performances need to be tested.…”

Section: Introductionmentioning

confidence: 99%

“…The local Maritime pine provenance shows a fairly low juvenile mature correlation for vigour, which may originate in various biomass allocation strategies to roots and shoots (Danjon, 1994b(Danjon, , 1995Kremer, 1992): some families may favour the development of their aerial parts (the 'sprinters') and other families may develop larger root systems (the 'stayers'). After the onset of high inter-tree competition, the stayers outrun the sprinters, since water and nutriments are the main limiting factor.…”

Section: Introductionmentioning

confidence: 99%

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The Supporting Roots of Trees and Woody Plants: Form, Function and Physiology

Stokes¹

2000

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Effects of restoration of degraded lands on soils physicochemical properties and adaptability of planted woody species in southwestern Niger

2022

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This study examines the effects of restoration of degraded lands on soils physicochemical properties and adaptability of planted woody species over a period of 4-6 years. It is based on: (1) Physicochemical analyses of soils (granulometry, calcimetry, and organic matter); (2) measures carried out for the dimensioning of anti-erosion structures;(3) dendrometric measurements on planted woody species on a density from 96 to 625 plants/ha, and the excavations of their root systems. The soils are characterized by low levels of organic matter (<1%), and no calcium carbonate. Soil tillage through deep sub-soiling resulted in an improvement in soils quality marked by average proportions of clay (28.3%), silt (27.3%) on the anti-erosion structures, whereas the control sites are dominated by sand particles (64%) on average. The degradation mechanism of anti-erosion structures is mainly controlled by natural factors including topography, rainfall, and sand content of the soils with strong positive correlations (r ¼ 0:84; r ¼ 0:79; r ¼ 0:63 respectively). Restoration activities have led to the reconstitution of vegetation cover on degraded soils. Eucalyptus camaldulensis groups showed better adaptation as evidenced by their high structural shape parametres including Lorey's mean height (5.16-8.03 m), and mean crown diameter (1.66-3.3 m) with a tracer-type root system and high root density (74-88 roots) observed at 30 cm from the main stem. This study provides substantial information on the contribution of erosion control measures and their interactions with soil and vegetation resources. It constitutes a scientific tool that is well-adapted to the Sahelian (Niger, Mali, Burkina Faso, Chad, Mauritania and Senegal) context indispensable for the implementation of sustainable development strategies. The results thus obtained can be used as a reference for the choice of woody species to be planted according to the toposequence and the nature of the anti-erosion structures made, with a good control of their durability while taking into account the productivity of the soils.

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Etudes racinaires au sein du programme "croissance" de l'INRA (quercus petraea et pi nus pinaster)

Cited by 9 publications

References 2 publications

Assessing and analyzing 3D architecture of woody root systems, a review of methods and applications in tree and soil stability, resource acquisition and allocation

Assessing and analyzing 3D architecture of woody root systems, a review of methods and applications in tree and soil stability, resource acquisition and allocation

The Supporting Roots of Trees and Woody Plants: Form, Function and Physiology

Effects of restoration of degraded lands on soils physicochemical properties and adaptability of planted woody species in southwestern Niger

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