Statut de la matière organique des sols de la zone nord-soudanienne au Burkina Faso

Abstract

Soil organic matter status in the north sudanian zone of Burkina Faso. The objectives of the study were to enhance the knowledge on organic matter of soils under natural formations from north sudanian zone and then to compare their characteristics with those of soils located in the other climatic zones of Burkina Faso. Total carbon and nitrogen as well as the amounts of C and N involved in three particles size fractions [(0-50µm); (50-200µm); (200-2,000µm)], were determined. The results show that total C and N of these soils are higher than those of soils from the burkinabé sahelian and south sudanian zones. The chemical soil properties are positively correlated with the amount of C held by the (0-50µm) fraction. The study also indicates that organic status of the concerned soils is due to the influence of climate, soil moisture, temperature regimes and soil texture.

Keywords

• Burkina Faso
• granulometric fractionation
• organic matter
• soils