Chemical composition and biological value of spray dried porcine blood by-products and bone protein hydrolysate for young chickens

Dorota Jamroz (1) , Andrzej Wiliczkiewicz (2) , Janusz Orda (2) , Jolanta Skorupińska (2) , Maja Słupczyńska (2) , Jan Kuryszko (3)

1 Department of Animal Nutrition and Feed Quality
2 Department of Animal Nutrition and Feed Quality
3 Department of Animal Histology and Embryology

Abstract: 1. Chemical composition of spray dried porcine blood by-products characterized by the great diversification, of crude protein contents. In spray dried porcine blood plasma (SDBP) it varied between 670-780 g/kg, in spray dried blood cells (SDBC) - between 830-930 g/kg and in bone protein hydrolysate (BPH) at range of 740-780 g/kg. As compared to fish meal, these feeds are poor in Met and Lys. Moreover, in BPH deep deficits of Met, Cys, Thr and other amino acids were stated. 2. Addition of 20 or 40 g/kg of analysed animal meals into feed mixtures for very young chickens (1-28 days post hatch) significantly decreased the body weight (BW) of birds. Only the share of 40 g/kg of SDBP and SDBC has caused the insignificantly lower BW as compared to control. There no significant differences between treatments and kind of used meals in feed intake, haematocrit and haemoglobin level in blood were stated. 3. Application of bone protein and blood cells meals into mixtures decreased the IgG concentration in blood and caused the shortening of length of femur and tibia bones. However, the changeability of mineral composition of bones was insignificantly affected by used kind of animal blood by-products. 4. The blood by-products, rich in microelements, improved the Ca and Cu retention, only. In comparison to control chickens significantly better accretion of these minerals was stated in treatments fed mixtures containing 20 g/kg of SDBP or 40 g/kg of SDBC. 5. Great variability of apparent ileal amino acid digestibility in chickens was determined. There, some significant differences, related to the kind of used animal meals were confirmed for Asp, Pro, Val, Tyr and His. In general, stated apparent ileal digestibility of amino acids was by about 2-3 %-units better in chickens fed mixtures containing examined animal by products than in control birds.

Mots clés: Life Sciences

Domaines: Biologie animale

Dorota Jamroz, Andrzej Wiliczkiewicz, Janusz Orda, Jolanta Skorupińska, Maja Słupczyńska, et al.. Chemical composition and biological value of spray dried porcine blood by-products and bone protein hydrolysate for young chickens. British Poultry Science, 2011, 52 (05), pp.589-605. ⟨10.1080/00071668.2011.610298⟩. ⟨hal-00745613⟩