Interactions between phosphorus feeding strategies for pigs and dairy cows and separation efficiency of slurry

Phosphorus (P) in manure is a nutrient source for plants, but surplus P amended to fields represents a risk to the environment. This study examines the interactions between low-P diets for pigs and dairy cows and the separation of animal slurry into a solid P fraction and a liquid fraction. Replacin...

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Veröffentlicht in:Environmental technology. - 1993. - 29(2008), 1 vom: 01. Jan., Seite 75-80
1. Verfasser: Sommer, S G (VerfasserIn)
Weitere Verfasser: Maahn, M, Poulsen, H D, Hjorth, M, Sehested, J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Phosphorus 27YLU75U4W Nitrogen N762921K75
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520 |a Phosphorus (P) in manure is a nutrient source for plants, but surplus P amended to fields represents a risk to the environment. This study examines the interactions between low-P diets for pigs and dairy cows and the separation of animal slurry into a solid P fraction and a liquid fraction. Replacing inorganic phosphates with phytase in pig feed reduced the concentration of P in slurry by 35%, but supplementing concentrates to dairy cows did not affect the P concentration in cattle slurry. Particle-size fractions of the slurry were not affected by these dietary changes. The amount of dry matter (DM) in the < 0.025 mm fraction was greater in pig slurry than in cattle slurry, but the relative amounts of P and nitrogen (N) were larger in the > 0.025 mm fraction. Replacing feed phosphate, in the form of mono-calcium phosphate, with phytase in the pig diet reduced the separation index (efficiency) of P from 80% to 60% 
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700 1 |a Sehested, J  |e verfasserin  |4 aut 
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