Soil Environment Constraints to Root Growth

Zobel, R. W.

doi:10.1007/978-1-4612-2894-3_2

Cited by 38 publications

(24 citation statements)

References 39 publications

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“…This variability in resource availability can be related to e.g. variations in soil texture [96], topography, climate, vegetation, or soil management. The subterranean activity of soil fauna can create localised zones of fertile loose soil in otherwise poor soil horizons [45,66].…”

Section: Soil Water and Nutrients Heterogeneity In Time And Space In mentioning

confidence: 99%

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Doussan¹,

Pagès

Pierret

2003

Agronomie

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-We provide a brief overview on soil exploration and resource extraction by roots during the course of plant development. First, we examine how roots explore the soil volume in relation with the heterogeneity of soil conditions. We then consider resource acquisition by roots and root systems, taking into account the root system's heterogeneous functioning and its variable degree of plasticity. In extensive, complex and dynamic systems such as root systems, processes of soil exploration and resource acquisition can be analysed through the unifying point of view of root system architecture. We exemplify how a modelling approach based on the concepts of functional architecture has potential to provide sharper insight into the soil exploration/utilization processes. root system / model / architecture / review / soil exploration Résumé -Exploration du sol et acquisition des ressources hydro-minérales par les systèmes racinaires des végétaux : un point de vue architectural et de modélisation. Nous présentons une courte revue décrivant les grandes étapes de colonisation et d'exploitation du sol durant le développement de la plante. Nous montrons tout d'abord comment les racines explorent le sol en interagissant avec l'hétérogénéité des conditions de sol (du point de vue des nutriments ou des contraintes à la croissance). De cette vision essentiellement géométrique (exploration), nous passerons à l'exploitation des ressources par les racines en considérant l'hétérogénéité de fonctionnement du système racinaire ainsi que son plus ou moins fort degré de plasticité. Ces processus d'exploration et d'exploitation du sol seront présentés sous l'angle unificateur de la prise en compte de l'architecture racinaire. Dans des systèmes complexes et très dynamiques, comme un système racinaire, nous montrerons, avec des exemples récents, comment la modélisation, fondée sur une architecture fonctionnelle, permet d'aller plus loin dans la compréhension des processus d'exploration/exploitation du sol par les plantes. système racinaire / modélisation / architecture / revue / exploration du sol

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Section: Soil Water and Nutrients Heterogeneity In Time And Space In mentioning

confidence: 99%

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Doussan¹,

Pagès

Pierret

2003

Agronomie

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“…In the case of the later factor, the role of limited O 2 diffusion as an influence on plant growth in compacted soils is emphasized over that of other soil gases (Tackett and Pearson 1964;Foil and Ralston, 1968;Grable and Siemer 1968;Greacen and Sands 1980;Schumacher and Smucker 1981;Bathke et al 1992;Bakker and Bronswijk 1993;Grant 1993;Hoffmann and Jungk 1995). However, the literature also shows that the effects of soil CO 2 on plant growth are manifold and vary according to its interaction with soil chemistry, soil environment and the physiology of the plant (Zobel 1992(Zobel , 1995. Publications have shown that root respiration and growth are directly affected by elevated soil CO 2 concentrations and that soil compaction can intensify this effect (Tackett and Pearson 1964;McAfee et al 1989;Qi et al 1994;McDowell et al 1999).…”

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confidence: 99%

Response of soil CO₂ and O₂ concentrations to forest soil compaction at the Long-term Soil Productivity sites in central British Columbia

Conlin¹,

Driessche²

2000

Can. J. Soil. Sci.

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Conlin, T. S. S. and van den Driessche, R. 2000. Response of soil CO 2 and O 2 concentrations to forest soil compaction at the Long-term Soil Productivity sites, Central British Columbia. Can. J. Soil Sci. 80: 625-632. The concentrations of soil CO 2 and O 2 at three Long-term Soil Productivity sites located in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia, Canada, were monitored over several growing seasons. These sites were treated with three levels of soil compaction and three levels of organic material removal following forest harvest. Both compaction and depth had a significant effect upon soil CO 2 concentrations and average values increased in response to deeper sampling and compaction. Removal of the forest floor and other organic materials had no significant effect upon soil CO 2 and O 2 concentrations. Mean soil CO 2 concentrations varied from site to site and data collected over three growing seasons also showed that mean CO 2 values in response to compaction fluctuated significantly from year to year. The high levels of soil CO 2 observed in this study (up to 40 000 µL L -1 ), especially in response to the compaction treatments, may have had a substantial effect upon whole plant carbon allocation as well as soil nutrition available to trees growing on the treated plots. Although mean soil O 2 also decreased in response to compaction and sampling depth, these lower concentrations did not approach the levels required to influence plant growth.Key words: Soil, compaction, carbon dioxide, oxygen, long-term soil productivity Conlin, T. S. S. et van den Driessche, R. 2000. Réponse à la compaction des concentrations de CO 2 et de O 2 des sols forestiers aux Emplacements d'observation de longue durée de la productivité du sol dans le centre de la Colombie-Britannique. Can. J. Soil Sci. 80: 625-632. Nous avons surveillé durant plusieurs saisons de croissance l'évolution des concentrations de CO 2 et de O 2 dans le sol à trois placeaux d'observation de longue durée de la productivité du sol dans la zone biogéoclimatique sud-boréale à épinette (épicéa) en Colombie-Britannique (Canada). Ces placeaux étaient exposés à trois intensités de compaction et à trois niveaux d'enlèvement de la couche organique à la suite de la récolte de la forêt. La compaction et la profondeur d'échantillonnage exerçait toutes deux un effet significatif sur les concentrations de CO 2 du sol, les valeurs moyennes augmentant en fonction du degré de compaction et de la profondeur de l'échantillon. L'enlèvement de la couche organique et d'autres matières organiques n'avaient pas d'effets significatifs sur les concentrations de CO 2 et de O 2 du sol. Les concentrations moyennes de CO 2 variaient d'un emplacement à l'autre et en outre leur réaction à la compaction fluctuait significativement d'une année à l'autre. Les concentrations élevées de CO 2 du sol observées (jusqu'à 40 000 µL L -1 ), surtout en réponse à l'intensité de la compaction, pourraient avoir un effet substantiel sur la disponibilité du carbone et des éléments ...

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“…olives) in terms of their physiological features (e.g. root apparatus) to deal with variable soil moisture storage (Zobel, 1992). Seasonal crops, represented here by wheat crops, are usually characterized by an almost complete vegetation ground cover with a high root density and shallow root depth.…”

Section: Background To the Study Regionmentioning

confidence: 99%

“…It is well known, for instance, that during the evolution of native plant species in any environment, a diversity of mechanisms is adopted by plant communities to adapt their progeny to the range of environmental perturbations encountered in nature (Zobel, 1992). There is evidence that plants with different rooting habitats show different seasonal courses of water exploitation, and that the duration of water stress and the distribution of soil moisture with depth will determine whether a species can succeed in a particular environment (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the habitats for plant domestication, selected along the years by farmers on the basis of yield performance (Zobel, 1992), should provide reduced competition, improved fertility, and reduced disease incidence, thus allowing increased productivity. In such a case, vegetation response, and its evolutionary adaptation to the multi-scale climate variability and landscape properties (soils, topography etc.)…”

Section: Introductionmentioning

confidence: 99%

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Analysis of soil and vegetation patterns in semi-arid Mediterranean landscapes by way of a conceptual water balance model

Portoghese

Iacobellis

Sivapalan

2008

Hydrol. Earth Syst. Sci.

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Abstract. This paper investigates the impact of various vegetation types on water balance variability in semi-arid Mediterranean landscapes, and the different strategies they may have developed to succeed in such water-limited environments. The existence of preferential associations between soil water holding capacity and vegetation species is assessed through an extensive soil geo-database focused on a study region in Southern Italy. Water balance constraints that dominate the organization of landscapes are investigated by a conceptual bucket approach. The temporal water balance dynamics are modelled, with vegetation water use efficiency being parameterized through the use of empirically obtained crop coefficients as surrogates of vegetation behavior in various developmental stages. Sensitivity analyses with respect to the root zone depth and soil water holding capacity are carried out with the aim of explaining the existence of preferential soil-vegetation associations and, hence, the spatial distribution of vegetation types within the study region. Based on these sensitivity analyses the degrees of suitability and adaptability of each vegetation type to parts of the study region are explored with respect of the soil water holding capacity, and the model results were found consistent with the observed affinity patterns.

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Soil Environment Constraints to Root Growth

Cited by 38 publications

References 39 publications

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Response of soil CO₂ and O₂ concentrations to forest soil compaction at the Long-term Soil Productivity sites in central British Columbia

Analysis of soil and vegetation patterns in semi-arid Mediterranean landscapes by way of a conceptual water balance model

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Soil Environment Constraints to Root Growth

Cited by 38 publications

References 39 publications

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Soil exploration and resource acquisition by plant roots: an architectural and modelling point of view

Response of soil CO2 and O2 concentrations to forest soil compaction at the Long-term Soil Productivity sites in central British Columbia

Analysis of soil and vegetation patterns in semi-arid Mediterranean landscapes by way of a conceptual water balance model

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Response of soil CO₂ and O₂ concentrations to forest soil compaction at the Long-term Soil Productivity sites in central British Columbia