title: Composition of organic matter in particle size fractionated pig slurry.
abstract: Pig slurry is a heterogeneous mixture of different particle sizes that will have different mobility in soil. Therefore, a physically fractionated pig slurry sample was analysed, e.g. using pyrolysis-field ionisation mass spectrometry (Py-FIMS) in an effort to identify relationships between particle size and composition of organic matter. The presumably most mobile fractions in soils (<63 microm) accounted for approximately 50% of slurry dry matter and were dominated by lignins, and N-containing compounds. Sterols were especially abundant in the larger-sized fractions, which corresponds to their reported distribution in soils and surface waters. The averaged molecular masses indicated similarities of fractions <10 microm to aquatic humic substances and increasing content of plant material with increasing particle size. A statistical analysis of the compound class distribution revealed that the analysis of three particle size fractions is essential for the assessment of the composition and properties of slurry constituents.
authors: University of Trier, FB VI: Geography/Geosciences, Soil Science Section, Campus II, 54286 Trier, Germany. aust@uni-trier.de
authors: Marc-Oliver
authors: MO
authors: Aust
authors: Sören
authors: S
authors: Thiele-Bruhn
authors: Kai-Uwe
authors: KU
authors: Eckhardt
authors: Peter
authors: P
authors: Leinweber
mesh_terms: D000822:Animal Husbandry / Q000379:methods; D000818:Animals; D001709:Biotechnology / Q000379:methods; D017753:Ecosystem; D004785:Environmental Pollutants / Q000032:analysis*; D006812:Humic Substances / Q000032:analysis; D008372:Manure; D013058:Mass Spectrometry / Q000379:methods; D009068:Movement; D010316:Particle Size; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis; D013552:Swine; D013696:Temperature
chemical_list: D004785:Environmental Pollutants; D006812:Humic Substances; D008372:Manure; D012987:Soil; D012989:Soil Pollutants