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Lamy Frédéric

Maître d'enseignement HES en sciences du sol et de l'environnement

Main skills

Cartographie des sols

Main contract

Maître d'enseignement HES en sciences du sol et de l'environnement

Changins- Haute école de viticulture et œnologie
Route de Duillier, 1260 Nyon, CH

BSc HES-SO en Viticulture Oenologie - Changins- Haute école de viticulture et œnologie

Pédologie appliquée
Sol : Description de profil, interprétation du potentiel viticole et préservation de leur qualité
Irrigation
Fertilisation
Synthèse et étude de cas

2022

Services écosystémiques selon le mode de gestion du cavaillon

Professional paper

Vignes & Vergers, 2022 , no 4, pp. 0008-0010

Link to the publication

2020

Impact of a synthetic fungicide (fosetyl-Al and propamocarb-hydrochloride) and a biopesticide (Clonostachys rosea) on soil bacterial, fungal, and protist communities

Scientific paper ArODES

Bertrand Fournier, Sofia Pereira Dos Santos, Julia A. Gustavsen, Gwenaël Imfeld, Frédéric Lamy, Edward A. D. Mitchell, Matteo Mota, Dorothea Noll, Chantal Planchamp, Thierry J. Heger

Science of The Total Environment, 2020, vol. 738, article no. 139635

Link to the publication

Summary:

The use of synthetic pesticides in agriculture is increasingly debated. However, few studies have compared the impact of synthetic pesticides and alternative biopesticides on non-target soil microorganisms playing a central role in soil functioning. We conducted a mesocosm experiment and used high-throughput amplicon sequencing to test the impact of a fungal biopesticide and a synthetic fungicide on the diversity, the taxonomic and functional compositions, and co-occurrence patterns of soil bacterial, fungal and protist communities. Neither the synthetic pesticide nor the biopesticide had a significant effect on microbial α-diversity. However, both types of pesticides decreased the complexity of the soil microbial network. The two pesticides had contrasting impacts on the composition of microbial communities and the identity of key taxa as revealed by microbial network analyses. The biopesticide impacted keystone taxa that structured the soil microbial network. The synthetic pesticide modified biotic interactions favouring taxa that are less efficient at degrading organic compounds. This suggests that the biopesticides and the synthetic pesticide have different impact on soil functioning. Altogether, our study shows that pest management products may have functionally significant impacts on the soil microbiome even if microbial α-diversity is unaffected. It also illustrates the potential of high-throughput sequencing analyses to improve the ecotoxicological risk assessment of pesticides on non-target soil microorganisms.

Alternative aux herbicides: choix et entretien d’espèces pour la couverture du rang de culture

Professional paper

Revue suisse de viticulture arboriculture horticulture, 2020 , vol. 52, no 5, pp. 282-291

Summary:

Les zones difficilement mécanisables (rang de culture, parcelles en pente ou non accessibles) constituent un défi technique pour les alternatives aux herbicides. Une solution consisterait à semer des couverts végétaux peu concurrentiels et de faible hauteur, mais à même de maîtriser le développement des adventices indésirables par allélopathie (capacité des plantes à interférer entre elles au travers de médiateurs chimiques). En vue du développement d’un tel couvert, trois intensités de fauche différentes ont été comparées sur des espèces semées pures et en mélange, en automne et au printemps,
avec des témoins de flore spontanée et de désherbages chimique et mécanique. Après une première année d’essai, on constate que les semis d’automne ont offert un plus grand nombre de services écosystémiques durant la saison végétative que les semis printaniers: meilleure installation du semis et protection du sol, blocage des adventices indésirables, proportion de mulch plus élevée. De plus, la gestion de la fauche a été déterminante pour
l’évolution des différents couverts végétaux l’année suivante: la pérennité du brome des toits (Bromus tectorum) et de la luzerne lupuline (Medicago lupulina) a pu être assurée avec le bon nombre de fauches.L’absence totale de fauche s’est globalement révélée inadaptée.

2016

Structural damage and recovery determined by the colloidal constituents in two forest soils compacted by heavy traffic

Scientific paper ArODES

N. Goutal-Pousse, Frédéric Lamy, J. Ranger, Pascal Boivin

European Journal of Soil Science, 2016, vol. 67, no. 2, pp.160-172

Link to the publication

Summary:

The role of colloidal constituents in soil structure and its resistance to compaction was studied in two acid forest soils of contrasting pH, clay type and texture. The soils were trafficked with an eight‐wheel‐drive forwarder, and undisturbed topsoil samples were taken on trafficked and control plots. Shrinkage analysis was used to assess the soil's physical behaviour, and in addition texture, organic carbon content and exchangeable Al3+ (Alex) and amorphous Al oxide (Aloxa) contents were determined. The effect of each constituent on the soil's physical properties was assessed with covariance analysis. The hydro‐structural stability and coarse pore (> 150 µm radius) and structural pore volumes of control samples were strongly determined by organic carbon and the forms of Al, whereas the plasma porosity was determined by clay content only. Organic carbon and Aloxa increased the structural pore and coarse pore volumes and modified their susceptibility to compaction; organic carbon provided a protecting effect, whereas it was the opposite with Aloxa. We observed contrasting effects of the colloidal constituents and of the behaviour of the pore systems on compaction. The situation is complex and we need to take into account the effects of the colloidal constituents to determine the effects of compaction on the soil's porosity. A simplified approach in which we used the water content at −10 hPa as a covariate predicted soil bulk density as accurately as with all the analytical covariates, and it seems to be an inexpensive way to assess compaction.

2018

An example of a vine-physiology based fine-scale terroir study in the AOC Lavaux-region in Switzerland

Conference ArODES

Markus Rienth, Frédéric Lamy, Dorothea Noll, Fabrice Lorenzini, Olivier Viret, Vivian Zufferey

Proceedings of 12th International Terroir Congress, Zaragoza Spain, 18-22 June 2018

Link to the conference

Summary:

The aim of this ongoing study is to establish a vine physiology, berry quality - based methodology to analyze small scale differences between plots in a sub-region of the AOC Lavaux, in Switzerland. The production area Villette is almost to 100% planted with the cultivar Chasselas L. covering a total of 140 ha of steep slope terraced vineyards and offers an excellent site for terroir studies. A representative network of 23 plots covering the entire Villette production area was established in 2016 and 2017. Important differences in budburst and flowering were observed between plots whereas altitude was the main driver of precociousness. Expectedly most precious plots had highest sugar and lowest malic acid concentrations at final sampling date. Individual berry weight variation was up to 35 % at the last sampling (2.4 to 3.3 g) with variation in sugar concentration of 13 % (70-84° Oechsle). Sugar quantity per berry variation was however twice as high (26%), illustrating important differences in the sugar accumulation pattern between plots. Interestingly the latest plots accumulated highest sugar per berry with lowest concentration. The preliminary results of this ongoing study provide valuable information of the ripening potential of Chasselas in a small mesoclimate and illustrates the possibilities to characterize viticultural terroirs based on vine physiology measurements.

Achievements