NO-TILLAGE AND LEGUMINOUS-BASED CROPPING SYSTEMSARE EFFICIENT STRATEGIES TO INCREASE CARBON CONTENT IN A SUBTROPICAL SOIL

摘要

Inadequate soil management practices adopted in southern Brazil during the 1970s and 1980s caused severe land degradation problems,such as soil erosion and fertility depletion.In order to reclaim those lands,improved management strategies,like conservation tillage and high input cropping systems,which increase soil organic matter stocks and reduce soil erosion losses have been recommended to farmers.Besides improving soil quality,such strategies also strengthen efforts to promote carbon sequestration and to mitigate enhanced greenhouse effect.