Search results for "RELATION PLANTE-SOL"
showing 6 items of 6 documents
Response of soil bacterial communities to the incorporation of crop residues : influence of agricultural practices and link with the soil biological …
2010
The effect of the location of wheat residues (soil surface vs. incorporated in soil) on their decomposition and on soil bacterial communities was investigated by the means of a field experiment. Bacterial-Automated Ribosomal Intergenic Spacer Analysis (B-ARISA) of DNA extracts from residues, detritusphere (soil adjacent to residues), and bulk soil evidenced that residues constitute the zone of maximal changes in bacterial composition. However, the location of the residues influenced greatly their decomposition and the dynamics of the colonizing bacterial communities. Sequencing of 16S rRNA gene in DNA extracts from the residues at the early, middle, and late stages of degradation confirmed …
Diversité microbienne du sol: un enjeu majeur en agroécologie
2010
La connaissance des populations microbiennes du sol et la compréhension de leurs relations complexes avec la plante constituent des voies de progrès majeures pour l’évolution des pratiques agricoles vers des systèmes de cultures moins consommateurs en intrants de synthèse et plus respectueux de l’environnement.
Iron dynamics in the rhizosphere as a case study for analysing interactions among soils, plants and microbes
2009
International audience
Effect of tillage on weed seed dispersal in fields, in interaction with soil structure and tillage depth
2008
International audience
Relation entre les sols de la région manganésifère de Moanda (Gabon, Afrique de l'Ouest) et les terrils pisolitiques issus de l'activité minière
2007
National audience
Effects of seed traits on weed seedbank dynamics in response to seed depth and soil structure
2008
International audience; Weed seedling establishment in fields strongly depends of soil tillage because it determines both seed depth and soil structure. Species can differ in their ability to develop after germination a shoot able to grow towards the soil surface. The length of the pre-emergent shoot growth is limited and seed size could be a key functional trait related to the maximum shoot growth. Besides, during pre-emergent growth, a proportion of seedlings can remain blocked under obstacles into the soil. This mortality could be linked to the hypo- or epicotyl morphology. This trait could be correlated to the emergence force exerted at the extremity of the shoot in the soil. The maxima…