Determination of total tract digestibility of protein of clover grass silage and alfalfa meal in pigs | Scheinbare (Fäkale) Rohrprotein-Verdaulichkeit von Kleegrassilage und Luzernegrünmehl bei Schweinen
2009
Urdl, M., HBLFA Raumberg-Gumpenstein (Austria). Institut für Nutztieforschung | Gruber, L. | Schauer, A.
Due to the stepwise reduction of rates of conventional feedstuffs in organic farming, it is necessary to find alternative protein feedstuffs for fattening pigs. The roughages clover grass silage and alfalfa meal have the potential to substitute concentrates in rations for fattening pigs. To design rations with this high fibre feedstuffs and test them in on-farm feeding trials, two digestibility experiments with 15 pigs were made. In experiment 1, at a bodyweight of 30 kg, the apparent faecal protein digestibility was 47.5 % for clover grass silage and 45.7 % for lucerne meal. At an average liveweight of 50 kg a CP-digestibility of 34.6 % was determined for lucerne meal. Too high feed refusals made it impossible to calculate the digestibility for clover grass silage in the 2nd experiment. For the elaboration of rations for feeding trials with fattening pigs on farms, the CP-digestibility determined in experiment 1 for clover grass silage is suitable. Due to the fact that the apparent faecal CP-digestibility of lucerne meal lies within the range of tabular values (DLG 1991), which are based on a higher number of trials, it can be recommended to use those digestibility coefficients for the design of rations.
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