Weed community diversity in conservation agriculture: Post-adoption changes
| Autor: | Damien Derrouch, Guillaume Fried, Fabrice Dessaint, Bruno Chauvel |
|---|---|
| Přispěvatelé: | Agroécologie [Dijon], Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité Entomologie et Plantes Invasives, Laboratoire de la Santé des Végétaux, Anses, 34988, Montferrier-sur-Lez, France |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Conservation agriculture no-tillage 010603 evolutionary biology 01 natural sciences β-diversity Abundance (ecology) Sustainable agriculture weed survey 2. Zero hunger Ecology Agroforestry business.industry fungi functional convergence food and beverages Species diversity 04 agricultural and veterinary sciences respiratory system 15. Life on land Geography Agriculture α-diversity [SDE]Environmental Sciences 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Species evenness Animal Science and Zoology Species richness business Weed human activities Agronomy and Crop Science |
| Zdroj: | Agriculture, Ecosystems & Environment Agriculture, Ecosystems & Environment, 2021, 312, pp.107351. ⟨10.1016/j.agee.2021.107351⟩ |
| ISSN: | 0167-8809 |
| DOI: | 10.1016/j.agee.2021.107351 |
| Popis: | International audience; Conservation agriculture has been identified as one of the farming systems likely to deliver sustainable agriculture but its effects over time on the diversity and composition of weed communities are poorly documented. Using a network of 100 winter wheat fields selected to encompass a gradient of years in conservation agriculture from 1 to 20 years in the Bourgogne-Franche-Comté region (France), we analyzed the changes that occurred in the diversity of weed communities over several years, both in α- and β-diversity using a taxonomic (species level) and functional (10 response traits) approach. Based on three weed surveys (before the last herbicide use, before harvest, before sowing the following crop), we identified weeds able to maintain and/or to produce propagules. All the observed weed communities were rich (average species richness of 23.9 species), diverse (average Shannon diversity of 2.15) and equitably composed of low-density species. The results showed an increase in species richness, total weed abundance and α-functional diversity but no change in species diversity and species evenness over time. Heterogeneity and average values of β-taxonomic and β-functional diversity between communities were high in the early years following the adoption of conservation agriculture. Heterogeneity and average β-taxonomic and β-functional diversity decreased over time, leading to a homogenization of weed community assemblages. Despite major changes in cultural practices related to conservation agriculture, homogenization of weed community was not immediate and did not concern all the traits studied. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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