Culture d'une légumineuse et d'une céréale dans le système zaï avec différents amendements organo-minéraux -productivité et impact sur les propriétés biologiques d'un sol ferrugineux dégradé dénudé en Région nord soudanienne au Burkina Faso

Legume and Cereal Cropping in Zaï System with Different Organo-mineral Amendments - Productivity and Impact on Biological Properties of Degraded Bare Alfisol in North Sudanian Zone of Burkina Faso. Zaï is an agricultural practice that allows the cultivation of abandoned degraded soils. An experiment was conducted from 2006 to 2012 in Burkina Faso to assess the impact of this practice on the production of sorghum and cowpea, as well as on the biological properties of soils. The experiment was set up according to a factorial experimental design in Fischer blocks. The crops were grown in the trial , received different types of organic (manure, compost) and mineral (rock phosphate) input. The results showed that the intake of simple manure and compost significantly increased the yield of the two crops. The addition of phosphate (2 t.ha-1) to compost (3 t.ha-1) and to manure (3 t.ha-1) increased the yields of cowpea and sorghum respectively by 70 to 80% and 88 to 160% compared to sole compost and manure applications. The biological activity of the soil was not influenced by the type of crop but rather by organo-mineral intakes. The combination of rock phosphate to manure had a particularly positive effect on soil biological activity. The natural phosphate intake associated with organic matter therefore appears essential to maintain crop production and soil properties.