Evaluation de la fertilité physique d'un sol sableux sous mines d'argile additionnées

Abstract

The soils of the Mostaganem area have a sandy texture overall and are poor in organic matter, therefore having a high permeability which induces leaching of fine elements, for this reason, we thought of making amendments (i) organic (manure), (ii) mineral (bentonite: raw clay) and (iii) a mixture (manure + bentonite) with appropriate doses in order to improve the physical fertility of the soil, namely: bulk density, permeability, porosity, water retention and structural stability, and crop yield for organic agriculture and sustainable development. To do this, we chose the following doses: 2.5%, 5%, 7.5%, 10%, 15% and 20%. Soils amended with a mixture improved the physical parameters of the soil, and for yield, the dose of 10% bentonite gave the best result followed by the F10% and AF20% treatments respectively in comparison to the control. These results highlight the role of the combination of mineral and organic amendments in stabilizing the structure and improving soil fertility, knowing that organic amendments increase the level of organic matter and mineral amendments protect it against the mineralizing activity of microorganisms and enrich the soil with fertilizing elements, which leads to an increase in yield.