Search results for "organiques"
showing 6 items of 16 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 …
Apport de l'isotopie couplée aux outils de biologie moléculaire (DNA/RNA-SIP) pour caractériser la dynamique des communautés impliquées dans la dégra…
2008
Biodiversité des sols viticoles: un héritage des modes d'occupation et des pratiques culturales anciennes?
2018
3 pages; National audience
Le Néolithique final. Les faits. Les matériaux organiques et minéraux.
2013
Le Néolithique final. Les faits. Les matériaux organiques et minéraux.
Study of parameters endogeneous and exogeneous to ordinary Portland ciment influencing hydration of its main phase : tricalcium silicate
2012
This work devoted to study various parameters influencing hydration of silicate phase main Ordinary Portland Cement (OPC) was performed at the Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB). This study is part of the project "Crystal Growth Control" initiated by BASF in order to monitor and provide the best as possible the hydration of Ordinary Portland Cement. The dissolution of alite, like the pure C3S one, is fast in pure water. Speed decreases with deviation from equilibrium and the concentration of aluminates ions in solution. There is also an adsorption on the surface of the aluminum which is into the alite and released by dissolution. Germination and growth of C-S-H has bee…
Apport de composts, fumiers ou lisiers : que deviennent les graines des « mauvaises herbes » ?
2013
Les composts, fumiers ou lisiers contiennent des graines d’adventices ou « mauvaises herbes » qui peuvent représenter un frein à la valorisation de ces matières organiques en agriculture. Des chercheurs de l’Inra ont mis en évidence que l’azote apporté par les fumiers favorise la germination précoce de certaines semences adventices produites après l’apport des matières organiques au sol. Cet azote les empêche ainsi de se développer dans les cultures suivantes, en cas de travail du sol ou de traitements herbicides avant le semis de ces cultures.