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Pommiers en système agroforestier : Architecture, phénologie et flux de sève

Abstract : Diversification of agricultural system has become a major stake in the current movement for the decrease of pesticides use. Various works on multispecies agroecosystem conception try to substitute ecosystemic services to chemical inputs. Apple tree orchards, holder of highest number of treatment record, must face these stakes. GAFA project, set up by the resource team of the UMR System of Montpellier, tackles this issue through the conception of an agroforestry orchard composed with three layers: hybrid walnut trees (23rdyears), Dalinette apple trees (3rdyear), and a leguminous crop in the inter row. The aim of this project is to study the behaviour of apple trees in various light competition contexts. These apple trees are classed in three modalities characterized by their position relative to the walnut trees: row, inter-row and control (traditional orchard without walnut). This study focuses on the development of apple treesarchitecture, phenologyand sap flow. Using allometric relationships,the leaf areas were determined and a dynamic of growth and phenological stages were realized. The results reveal that a strong competition (modality“row”) for the light causes a delay in the development of the apple trees which present smaller leaf areas, fewer ramifications, and less inflorescences. Stunting is longer and more frequent. These developmental delays are correlated with a lower sap flow intensity. However, apple trees in intermediate exposure conditions (inter-row) have a developmental delayon the control that is much smaller than the row-apple trees, or even negligible.
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https://hal.inrae.fr/hal-03030300
Contributor : Pierre-Eric Lauri <>
Submitted on : Monday, November 30, 2020 - 8:01:38 AM
Last modification on : Thursday, March 18, 2021 - 11:54:28 AM

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  • HAL Id : hal-03030300, version 1

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Martin Garaux, Benjamin Pitchers, Bertrand Vandoorne, Pierre-Éric Lauri. Pommiers en système agroforestier : Architecture, phénologie et flux de sève. [Stage] INRAE. 2018. ⟨hal-03030300⟩

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