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Master Thesis

Impact des apports d'amendement et de fertilisant sur le rendement viticole : étude dans le vignoble audois au Domaine de Cigalus

Abstract : The study, carried out in Aude for 2 years, aims to validate the hypothesis according to which well-chosen contributions of soil enrichers (young biodynamic compost) and nitrogen fertilizers make it possible to restore low yields (less than 5 t / ha in the plains), thanks in particular to an aggravation of soil activity. Many contradictory studies have been carried out on the impact of biodynamics on the vine, but in general they tend to show that the yield is lower and the life of the soil higher ( vs conventional). The present study compares 4 modalities (1: alternation of organic soil enricher and nitrogen fertilizer; 2: fresh biodynamic manure compost + nitrogen fertilizer; 3: organic amendment + nitrogen fertilizer; 4: control) for 6 years by means of indicators about soil, vines and wine. In year 2, statistically significant differences appear. The control modality is one of the two modalities which present the greatest mass of pruning wood (> 0.5 kg / stock), contrary to expected. The biodynamic method shows a decrease in the microbial biomass of the soil (-14% in 1 year), in contradiction with the literature. The biggest yield is in the control modality (4,74 t / ha). As the effects of soil enrichers are expected to intensify in the years to come, the results of the next few years will probably amplify the differences between modalities. To aim for a lasting improvement of the yield, other operations (cover cropping, reduction of tillage, revision of pruning practices, etc.) could be tested on modality 1.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-03174721
Contributor : Montpellier Supagro <>
Submitted on : Friday, March 19, 2021 - 2:30:23 PM
Last modification on : Wednesday, April 28, 2021 - 3:38:33 AM

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  • HAL Id : dumas-03174721, version 1

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Simon Ister. Impact des apports d'amendement et de fertilisant sur le rendement viticole : étude dans le vignoble audois au Domaine de Cigalus. Agronomie. 2020. ⟨dumas-03174721⟩

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