title: Carbon mineralization and distribution of nutrients within different particle-size fractions of commercially produced olive mill pomace.
abstract: Composting is a realistic option for disposal of olive mill pomace (OMP) by making it suitable as a soil amendment for organic farming. The chemical and physical characteristics and contribution of particle-size fractions to total nutrients and carbon mineralization of seven commercial composts of OMP (COMP) were investigated. Higher proportions of manure, co-composted with OMP, reduced the organic matter (OM), total carbon and C:N ratio of the product, but increased the content of nutrients and fine particles. The fine particles had higher nutrient contents, but less OM and carbon and, unlike larger particles, did not exhibit any phytotoxicity. Less than 1.5% of added carbon was mineralized in whole compost, but a lower rate was found with larger particles. Separation of COMP by particle size fractionation and application as a soil conditioner is recommended for better optimization of COMP with the <1mm fraction providing the higher quality compost.
authors: Área de Ecología, Universidad de Jaén, Campus las Lagunilla S/N, Campus de Excelencia Internacional Agroalimentario, ceiA3, 23009 Jaén, Spain.
authors: Beatriz
authors: B
authors: Gómez-Muñoz
authors: Roland
authors: R
authors: Bol
authors: David
authors: D
authors: Hatch
authors: Roberto
authors: R
authors: García-Ruiz
mesh_terms: D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D002482:Cellulose / Q000032:analysis; D005591:Chemical Fractionation / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis*; D031220:Lepidium sativum / Q000254:growth & development; D008031:Lignin / Q000032:analysis; D008903:Minerals / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis; D031658:Olea / Q000737:chemistry*; D010316:Particle Size; D010758:Phosphorus / Q000032:analysis; D059808:Polyphenols / Q000032:analysis; D025341:Principal Component Analysis; D012987:Soil
chemical_list: D007220:Industrial Waste; D008903:Minerals; D059808:Polyphenols; D012987:Soil; D010758:Phosphorus; D002244:Carbon; D002482:Cellulose; D008031:Lignin; D009584:Nitrogen