Organic materials and their effect on the adsorption and release of zinc in gypsum soils

Abstract

A zinc adsorption experiment was carried out on three soils with different gypsum contents to which sheep were added to increase the adsorption of zinc. Poultry, estimated at (12,026) kg. mg-1 zinc, but the lowest amount of zinc adsorbed on average was recorded in the third soil G3 (189 g.kg-1 gypsum) with mefoles from whole cow ears (8.99) kg.mg -1A decrease in release values is observed at low levels of zinc addition. The reason may be due to the high content of organic matter in the soil, as organic complexes form with zinc ions, making it difficult to release, or due to the binding of zinc to specialized sites for adsorption, as the force of its displacement was insufficient, which led to the soil holding it. In addition to precipitation on the surfaces of metals and oxides, especially with the pH value (7.76-7.10), which encourages the precipitation of most minor elements, including zinc.

Keywords

• organic manure
• zinc
• gypsum soils
• organic poultry
• adsorption