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Forty sows (Landrace×Yorkshire), with an average body weight (BW) of 184.5 kg and average parity of 2.65, were used to determine the effects of a phytogenic feed additive (PFA) on growth performance, digestibility of nutrients, faecal NH3-N gas content, blood and milk characteristics and litter performance. Dietary treatments included: 1. control (CON) and 2. PFA (basal diet + 0.04% phytogenic feed additive). Digestibility of dry matter (DM) was increased signifi cantly (P<0.05) in PFA treatment. Faecal ammonia nitrogen (NH3-N) measured at the end of experiment was reduced (P<0.05), however no signifi cant effect (P>0.05) was observed on the digestibility of protein in PFA. On day 1 of lactation, albumin and lymphocyte were decreased (P<0.05) whereas WBC was increased signifi cantly (P<0.05) when sows were fed the PFA diet. IgG content in milk was increased by PFA at farrowing and after farrowing 12 h (P<0.01; P<0.05). Similarly, IgA content in milk was increased by PFA after farrowing 12 h (P<0.01). Protein and solid concentration in colostrum were signifi cant lower (P<0.01; P<0.05) in PFA treatment than CON treatment after farrowing 12 h. In conclusion, feeding 0.04% of PFA from day 107 of gestation to day 21 of lactation improved DM digestibility, RBC and WBC concentration, and lactose, IgG and IgA production in colostrums and decreased faecal NH3-N concentration.

journal of animal and feed sciences

Effects of phytogenic substances on growth performance, digestibility of nutrients, faecal noxious gas content, blood and milk characteristics and reproduction in sows and litter performance