The feeding of ad libitum dietary protein to organic growing-finishing pigs

Sam Millet, E Ongenae, M Hesta, M Seynaeve, S De Smet, G P J Janssens

    Onderzoeksoutput: Bijdrage aan tijdschriftA1: Web of Science-artikelpeer review


    The effects of three dietary protein levels on growth, meat, and carcass traits were studied in organic pigs fed a three-phase diet. Assuming lysine was the first limiting amino acid, feeds were formulated to ileal digestible (ID) lysine content, with the ID lysine:crude protein ratio set at a constant of 4%. Feeds were also formulated to an isocaloric rate (net energy: 9.4 MJ/kg during the first feeding phase, 9.25 MJ/kg during the second feeding phase and 9.1 MJ/kg during the finisher phase), with a high (HP), a medium (MP) or a low (LP) protein content ranging from 20% to 14% crude protein (CP). ID lysine content of the LP and MP feed was, respectively, 80% and 90% of the ID lysine content of the HP feed. The nutrient formulation of the HP feed was similar to nutrient levels commonly used in conventional Belgian pig farming. From 20 to 40 kg liveweight, the pigs showed better feed conversion ratios, with an increasing dietary protein concentration (r(2)=0.84). This effect was not observed in the second and third phases, although a significant effect of protein concentration on voluntary feed intake in the second phase did occur (P=0.018), probably as a compensation for the lower protein concentration in the LP diet. Analysis of the carcasses showed a lower meat percentage with lower protein concentration (P
    Oorspronkelijke taalEngels
    TijdschriftVeterinary Journal (London, England : 1997)
    Pagina's (van-tot)483-490
    Aantal pagina’s8
    PublicatiestatusGepubliceerd - 2006


    Bekijk de onderzoeksthema's van 'The feeding of ad libitum dietary protein to organic growing-finishing pigs'. Samen vormen ze een unieke vingerafdruk.

    Dit citeren