Search results for "Agricultural Science"
showing 10 items of 901 documents
The adaptation of cornflower in different compartments of the agricultural landscape
2015
International audience; Agrosystems are among habitats most affected by the decline of biodiversity. This decline isrelated to the intensification of agricultural practices carried out since the 50s (simplified rotations,fertilizer and pesticide use; ...). The study of the weed flora shows still less developed plantcommunities. Currently, there is evidence of the regression of the weed flora and especiallyspecies such as cornflower (Cyanus segetum. L). In western Europe, cornflower seems to bepresent in the field only. In our investigation, we tried to determine the factors that influence thepresence of cornflower in the different compartments of a field and its border.
Aptitude à la levée et à l'installation d'adventices dans des bandes enherbées. Quelles sont les réelles potentialités d'installation d'espèces adven…
2010
International audience
L’usage des terres et les pratiques agricoles contrôlent la minéralisation du C par l’intermédiaire de la biomasse bactérienne et de quelques famille…
2018
Mises-bas des animaux d’élevage. Chap II
2022
Variabilité génétique, d’histoire de vie et d’infection des populations de l’orobanche rameuse en France
2013
L'orobanche rameuse est une Angiosperme holoparasite épirhize qui infecte une large gamme de cultures annuelles. Selon la culture hôte, la durée de son cycle peut varier de 14 semaines (sur tomate/tabac) à 40 semaines (sur colza). Nous avons mené une expérimentation d'infections croisées afin d'évaluer l'intensité et la cinétique d''infection de populations d'orobanche. Deux populations du parasite, P-long collectée sur le colza et P-short collectée sur le tabac, ont été cultivées sur deux cultures (colza et tomate). Après, 4, 8, 12 et 16 semaines de culture, l'intensité d'infection et la distribution des stades de développement de l'orobanche ont été déterminées. Les deux populations d'oro…
Diversifying crop rotations with perennial forage crops: potential benefits for weed management & farmland biodiversity
2010
Crop rotation may be used to prevent the continuous selection of weed species adapted to one crop type. However, today’s crop rotations are often very short and simple. We studied the impacts of introducing perennial forage crops into cereal-based crop rotations on weed vegetation. Large-scale weed surveys in 632 fields in western France suggested that the weed species composition varied most strongly between perennial alfalfa forage crops and six annual crops[1]. Comparisons of wheat fields before, during, and after perennial alfalfa suggested that weed communities vary in a cyclic way during such crop rotations. This may be beneficial for weed management (suppression of weed species probl…
Mating system adaptation in populations of Centaurea cyanus L.
2010
International audience; Since the 50s, the agriculture intensification in Western Europe resulted in landscape homogenizationand reduction of habitat connectivity, which in turn caused a widespread decline of farmland biological diversity.Centaurea cyanus is one of the declining “segetal species”. It is an annual and insect-pollinatedspecies with a self-incompatibility system. When the populations are small and fragmented, they mayextinct if the incompatibility system cannot evolve towards a compatibility system. A coexistence ofmixed mating system is also possible in a population.In our study, we examined the ability of C. cyanus to produce seeds by autogamy. For this purpose,three conditi…
Trois jours au cœur du COLUMA 2016
2012
Lutte contre les mauvaises herbes en France, dix lustres en lumière : Analyse de 50 ans d’usage des herbicides tirée d’une « mine »
2010
Relationship between dietary-induced alteration of the hindgut microbiota and horse behavior during acute stressful events
2018
International audience