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...
| Publié dans: | Environmental technology. - 1993. - 29(2008), 1 vom: 01. Jan., Seite 75-80 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2008
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| Accès à la collection: | Environmental technology |
| Sujets: | Journal Article Research Support, Non-U.S. Gov't Phosphorus 27YLU75U4W Nitrogen N762921K75 |
| Résumé: | 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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| Description: | Date Completed 22.10.2008 Date Revised 21.11.2013 published: Print Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330802009287 |