title: Treatment by acidification followed by solid-liquid separation affects slurry and slurry fractions composition and their potential of N mineralization.
abstract: The aim of the present work was to assess the effect of treatments by acidification, solid-liquid separation or acidification followed by solid-liquid separation on the physical and chemical composition of pig slurry (S) and pig slurry fractions (non acidified and acidified solid (SF and ASF) and liquid (LF and ALF) fractions), as well as on the potential of N mineralization of these pig slurry derived materials. Acidification strongly decrease the inorganic carbon content of S, SF and LF and it also affects the distribution of P, Ca and Mg between the solid and liquid fraction leading to an ALF more equilibrated than LF in terms of nutrients. Acidification increases the potential of organic N mineralization in SF and decreases the potential of N immobilization in S and LF. It can be concluded that the proposed treatment generates valuable slurry fractions with distinct characteristics and potential of N mineralization that may be incorporated to soil at different periods after sowing to comply with plant nutrient requirements.
authors.affiliation: UIQA Instituto Superior de Agronomia, TU Lisbon, Tapada da Ajuda, Lisbon, Portugal. dfangueiro@isa.utl.pt
authors.forename: David
authors.initials: D
authors.lastname: Fangueiro
authors.forename: Henrique
authors.initials: H
authors.lastname: Ribeiro
authors.forename: Ernesto
authors.initials: E
authors.lastname: Vasconcelos
authors.forename: João
authors.initials: J
authors.lastname: Coutinho
authors.forename: Fernanda
authors.initials: F
authors.lastname: Cabral
mesh_terms: D000143:Acids / Q000378:metabolism*; D000818:Animals; D002244:Carbon / Q000032:analysis; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008903:Minerals / Q000737:chemistry*; D009584:Nitrogen / Q000378:metabolism*; D012722:Sewage / Q000737:chemistry*; D013552:Swine
chemical_list: D000143:Acids; D008903:Minerals; D012722:Sewage; D002244:Carbon; D009584:Nitrogen