Barcelona, España
The aim of the present study was to analyze the effects of different forage inclusion levels in adult sow diets, to improve situations when intake has to be reduced or controlled. Five cull sows (Landrace x Large white), with more than 7 farrowing’s and grouphoused, were fed 3 different diets (D1: 40% forage; D2: 60% forage; Control diet: 0% forage). Diets D1 and D2 were offered ad libitum to find a broad estimation of daily dry matter intake, and TiO2 (1% DM of concentrated fraction) was included as indigestible marker to study the digestibility of the components of the diet. The main conclusions were that digestibility of organic matter (dMO) decreased according to forage inclusion in the final diet, but not in a linear way, as the dMO reduction substantially increases when the forage fraction was over 40%. Forage Metabolizable Energy (EM) content was also reduced accordingly. It was also observed that the dispersion of digestibility values between animals increased with the proportion of forage inclusion in the diet. It is concluded that the inclusion of up to 40% of forage in the diet, keeps the forage dMO in about 60%, but higher levels of forage inclusion (60%) reduce dMO down to 14%.
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