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Peter Kappel Theil

Effect of reduced dietary protein level on energy metabolism, sow body composition and metabolites in plasma, milk and urine from gestating and lactating organic sows during temperate winter conditions

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Increasing the daily energy supply by 15% and lowering the protein content in compound feed by 12 % below the recommended level for indoor sows improved energy utilization without compromising sow productivity. The daily protein- and amino acid requirements of pregnant sows in the low protein group were met. However, it seems to be problematic to lower the protein content in lactation diets fed to first parity sows in winter, as they showed insufficient feed intake in early and at peak lactation.
The total energy requirement of high yielding first parity outdoor sows during a mild winter was found to be 68 MJ ME/d in gestation and 153 MJ ME/d at peak lactation.
Original languageEnglish
JournalLivestock Science
Publication statusAccepted/In press - 2020

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