We measured soil CO, evolution rates with (S,) and without (S,,) the forest floor litter and root respiration monthly in 11-year-old loblolly pine (Pinus tueda L.) plantations during the fourth year of fertilization and irrigation treatments. Values of Srr ranged from less than 1 * pmol.ms -’ during the winter to greater than 5 pmol.m-‘s-l in late spring. Average Srr was significantly greater i...

Boreal ecosystems contain a substantial fraction of the earth’s soil carbon stores and are prone to frequent and severe wildfires. In this study, we examine changes in element and organic matter stocks due to a 1999 wildfire in Alaska. One year after the wildfire, burned soils contained between 1071 and 1420 g/m2 less carbon than unburned soils. Burned soils had lower nitrogen than unburned soi...

La mesure des stocks et flux de carbone forestier est absolument essentielle pour comprendre le rôle que jouent les forêts dans cycle global du mettre en place politiques efficaces d’atténuation réchauffement climatique mondial induit par l’augmentation gaz à effet serre d’origine anthropique. Cette revue bibliographique vise présenter l’état actuel connaissances sur incertitudes associées la q...

Sewage sludge production increases continuously reaching almost 20% (946 700 t 1 118 795 tons of dry matters in 2007) during the (directly or after composting). The remaining 30% was incinerated (with or without household wastes) or landfilled. Nowadays, sludge reduction is a major concern. This activity has to becom be careful to the environmental impacts of sludge treatment and disposal route...