Structural root architecture of 5-year-old Pinus pinaster measured by 3D digitising and analysed with AMAPmod

Danjon, Frédéric; Bert, Didier; Godin-Maury, Christophe; Trichet, Patrick

doi:10.1007/978-94-017-3469-1_6

Cited by 53 publications

(92 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It would therefore be appropriate to be able to characterise the root plates of the undamaged pines in order to check this hypothesis and demonstrate the relative importance of root and aerial systems [38,50]. Studies based on modelling the architecture of undamaged pines [14] and windthrow were undertaken with this in mind [5,18]. The relations showed that the level of damage was better explained by variability in dendrometric features within a stand rather than by the features themselves.…”

Section: Further Studiesmentioning

confidence: 99%

“…The relations showed that the level of damage was better explained by variability in dendrometric features within a stand rather than by the features themselves. In such monospecific and even-aged stands, variability in structure and architecture therefore seem to be essential to understanding wind behaviour and other studies have also been undertaken to understand and model how they evolve [2,6,8,14]. In the stand studied, other variables were more pertinent than the stem taper factor H/D, despite the fact that it is often considered to be an essential indicator of stand stability [1,3,11,35,57].…”

Section: Further Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Wind-firmness in Pinus pinaster A�t. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm

Cucchi

Bert

2003

Ann. For. Sci.

View full text Add to dashboard Cite

-Maritime pine (Pinus pinaster) stands in the Aquitaine region are of great economic importance but subject to Atlantic storms. In the Bordeaux region, two experimental sites located near each other, aged 20 and 51 years, made it possible to study the effects of different types of silviculture on wind-firmness during the 1999 storm. Stand density has a major influence on tree growth. When density increases, height increases and circumference decreases appreciably. In the dense stands, windthrown trees were less abundant and there were more leaning pines. With respect to other silvicultural factors in stands planted at typical densities: (i) genetic breeding did not increase damage intensity at the 20-year-old experimental site and phosphorus fertilisation decreased the windthrow at the 51-year-old experimental site; (ii) compared to the undamaged trees, the circumference of windthrown trees was 3.6 cm smaller, the relative crown length was 10% shorter and the stem taper coefficient was higher. This research has shown that wind-firmness is better in stands where the height, circumference and crown length are homogeneous. A more closed canopy seems to improve wind resistance by increasing the damping effect of swaying as a result of the crowns being in contact with each other and provides a more favourable ratio between the aerial parts and the roots.windthrow / silviculture / Pinus pinaster / stability / storm Résumé -Résistance au vent de peuplements de pin maritime dans le sud-ouest de la France. Influence de la densité, de la fertilisation et de l'amélioration génétique sur deux dispositifs endommagés lors de la tempête du 27 décembre 1999. Les peuplements de Pinus pinaster en Aquitaine sont économiquement très importants mais exposés aux tempêtes océaniques. Dans la région de Bordeaux, deux dispositifs de 20 et 51 ans peu éloignés ont permis d'étudier l'influence de la sylviculture sur la résistance au vent lors de la tempête de 1999. La densité est le facteur sylvicole le plus influent sur les caractéristiques des peuplements. Quand la densité augmente, la circonférence moyenne diminue notablement et la hauteur moyenne a tendance à augmenter. Les chablis étaient moins abondants et les pins penchés plus nombreux dans les peuplements denses. Pour les densités pratiquées en forêt de production : (i) l'amélioration génétique n'a pas augmenté l'intensité des dégâts dans l'essai de 20 ans, et la fertilisation au phosphore a réduit le taux de chablis sur l'essai de 51 ans ; (ii) par rapport aux pins intacts, les chablis ont une circonférence inférieure de 3,6 cm, une longueur relative de houppier plus courte de 10 % et un coefficient d'élancement du tronc plus fort. Ces caractéristiques peuvent traduire la diminution des capacités d'amortissement du balancement des arbres lors des bourrasques. Ces recherches ont montré que la résistance au vent est meilleure dans les peuplements homogènes en hauteur, circonférence ou longueur de houppier. Un couvert plus fermé semble améliorer la résistance au vent en augm...

show abstract

Section: Further Studiesmentioning

confidence: 99%

Section: Further Studiesmentioning

confidence: 99%

Wind-firmness in Pinus pinaster A�t. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm

Cucchi

Bert

2003

Ann. For. Sci.

View full text Add to dashboard Cite

show abstract

“…Jackson et al 1996;Danjon et al 1999), most of them focus on root growth, phenology (Cazzuffi et al 2006) and eco-physiological behaviour of vegetation and do not provide any data useful for root reinforcement estimation. Nevertheless, due to the complexity of reinforcement mechanisms, the variety of species and environments and the spatial variability of characteristics driving the processes, these studies can be considered site-specific and more experimental data are still needed for the complex understanding and generalization of the phenomenon.…”

mentioning

confidence: 99%

Effect of Oriental beech root reinforcement on slope stability (Hyrcanian Forest, Iran)

Abdi

2014

J. For. Sci.

View full text Add to dashboard Cite

Vegetation significantly affects hillslope mechanical properties related to shallow landslides and slope stability. The objective of this study was to investigate and quantify the effect of Oriental beech root reinforcement on slope stability. A part of Hyrcanian forest in northern Iran was selected for the study area. To do the research, the Wu model (WM) was used and data related to the distribution and tensile strength of Oriental beech roots were collected. Root distribution was assessed using the concept of the root area ratio and trenching method. Laboratory tensile tests were conducted on fresh roots for strength characteristics. The factor of safety was calculated for two different soil thicknesses (1 and 2 m) and slope gradients between 10 and 45°. The results showed that the root distribution generally decreased with increasing soil depth and the mean root strength value was 38.23 ± 1.19 MPa for 0.35-5.60 mm diameter range. The results verified a power relationship between tensile strength and root diameter. The reinforcement effect (C r ) decreased with depth and the strongest reinforcement effect was in the second soil layer (10-20 cm) which showed a shear strength increase of 1.47 kPa. The increased factor of safety due to the presence of roots in one-and two-metre soil thicknesses was 27-44% and 15-26%, respectively. The improvement effect of roots was increased with increasing slope gradient and shallower soil thicknesses.

show abstract

“…Les études portant sur la stabilité des arbres se concentrent sur la forme du plateau racinaire Gartner 2004;Atger et Édelin 1994), le patron de ramification des racines Martinez-Sanchez et al 2003;Atger et Édelin 1994), les racines structurales (Danjon et al 1999b;Drexhage et al 1999) ou le moment de cassure des racines en fonction d'un stress . Les études racinaires les plus détaillées se concentrent sur des individus jeunes, de moins de 10 ans (Martinez-Sanchez et al 2003;Danjon et al 1999b). Lorsque les arbres sont plus âgés, les études se bornent souvent à un rayon dépassant rarement 30 cm à partir de la tige Sheedy 1989 (Bert et Danjon 2006;Bond-Lamberty et al 2002;Watson et Tombleson 2002).…”

Section: Distribution Des Racines Dans L'espaceunclassified

Croissance, développement et architecture des structures aériennes et souterraines de pins gris (Pinus banksiana Lamb.) dans un peuplement naturel et une plantation /

Plourde¹

2007

View full text Add to dashboard Cite

Structural root architecture of 5-year-old Pinus pinaster measured by 3D digitising and analysed with AMAPmod

Cited by 53 publications

References 32 publications

Wind-firmness in Pinus pinaster A�t. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm

Wind-firmness in Pinus pinaster A�t. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm

Effect of Oriental beech root reinforcement on slope stability (Hyrcanian Forest, Iran)

Croissance, développement et architecture des structures aériennes et souterraines de pins gris (Pinus banksiana Lamb.) dans un peuplement naturel et une plantation /

Contact Info

Product

Resources

About