title: Water-soluble organic matter and biological activity of a degraded soil amended with pig slurry.
abstract: The effects of pig slurry (PS) addition at rates of 30, 90 and 150 m(3) ha(-1) per year for five consecutive years on total organic C (TOC), water-soluble organic C (WSOC), soil microbial biomass C (MBC), basal respiration (BR) and dehydrogenase (DEH) and beta-glucosidase (GLU) activities of soil were investigated in a field experiment conducted under barley cultivation and semiarid conditions. Cumulative PS addition at 90 and 150 m(3) ha(-1) rates had a significant stimulating effect on MBC content and DEH and GLU activities. In contrast, no significant effect of PS amendment on TOC, WSOC and BR was detected. These results suggest that PS addition revitalizes soil microbial metabolism in transitory form because of the low stability of the added organic matter.
authors.affiliation: Centro de Ciencias Medioambientales, Consejo Superior de Investigaciones Científicas, Serrano 115 dpdo., 28006 Madrid, Spain. diana.hernandez.g@gmail.com
authors.forename: Diana
authors.initials: D
authors.lastname: Hernández
authors.forename: José M
authors.initials: JM
authors.lastname: Fernández
authors.forename: César
authors.initials: C
authors.lastname: Plaza
authors.forename: Alfredo
authors.initials: A
authors.lastname: Polo
mesh_terms: D000818:Animals; D002244:Carbon / Q000032:analysis; D005308:Fertilizers; D001467:Hordeum; D008372:Manure; D010088:Oxidoreductases / Q000378:metabolism; D012987:Soil; D012988:Soil Microbiology; D012995:Solubility; D013552:Swine; D014867:Water; D001617:beta-Glucosidase / Q000378:metabolism
chemical_list: D005308:Fertilizers; D008372:Manure; D012987:Soil; D014867:Water; D002244:Carbon; D010088:Oxidoreductases; D001617:beta-Glucosidase