This research aims at evaluating the effects of the dietary addition of a supplement containing 75% of chestnut tannins (CT) on growth performance, slaughter traits (Exp. 1) and on nutrient utilization (Exp. 2) of Italian heavy pigs. Experiment 1 compared a control (C) diet with diets containing 0.15 or 0.30% of CT supplement. Forty-two barrows (91±6 kg of BW) were divided into pairs and kept in 21 partially-slatted pens equipped with individual feeding (7 pens/diet). Animals were slaughtered at a BW of 174±6 kg. The CT inclusion did not modify the performance and the slaughter traits but lowered the intensity of red colour (P<0.05) and brightness (P<0.05) of the gastric mucosa. Experiment 2 measured digestibility of nutrients, N balance and energy utilization of a C diet compared with low protein diets containing 0 or 0.53% of CT supplement (LP and LPT, respectively). Eighteen barrows (BW 153±4 kg) were housed in 6 metabolic cages in 3 periods of 14 days, with 6 animals per diet. LPT pigs produced less urine than LP (2132 vs 2561 g/d, P<0.05) and both were lower than C (2978 g/d, P<0.05). LP and LPT diets had similar digestibility (87.6 vs 87.8 % for DM, and 85.1 vs 83.9 % for CP). N and energy balance were similar among all diets (34.8, 39.0, 39.2% retained N, and 37.6, 35.7, 37.3% retained energy, for C, LP and LPT, respectively). In conclusion, tannins do not exert anti-nutritional effect at the concentrations applied.
Digestibility and metabolic utilisation of diets containing chestnut tannins and their effects on growth and slaughter traits of heavy pigs
Mason, Federico;Spanghero, Mauro
2019-01-01
Abstract
This research aims at evaluating the effects of the dietary addition of a supplement containing 75% of chestnut tannins (CT) on growth performance, slaughter traits (Exp. 1) and on nutrient utilization (Exp. 2) of Italian heavy pigs. Experiment 1 compared a control (C) diet with diets containing 0.15 or 0.30% of CT supplement. Forty-two barrows (91±6 kg of BW) were divided into pairs and kept in 21 partially-slatted pens equipped with individual feeding (7 pens/diet). Animals were slaughtered at a BW of 174±6 kg. The CT inclusion did not modify the performance and the slaughter traits but lowered the intensity of red colour (P<0.05) and brightness (P<0.05) of the gastric mucosa. Experiment 2 measured digestibility of nutrients, N balance and energy utilization of a C diet compared with low protein diets containing 0 or 0.53% of CT supplement (LP and LPT, respectively). Eighteen barrows (BW 153±4 kg) were housed in 6 metabolic cages in 3 periods of 14 days, with 6 animals per diet. LPT pigs produced less urine than LP (2132 vs 2561 g/d, P<0.05) and both were lower than C (2978 g/d, P<0.05). LP and LPT diets had similar digestibility (87.6 vs 87.8 % for DM, and 85.1 vs 83.9 % for CP). N and energy balance were similar among all diets (34.8, 39.0, 39.2% retained N, and 37.6, 35.7, 37.3% retained energy, for C, LP and LPT, respectively). In conclusion, tannins do not exert anti-nutritional effect at the concentrations applied.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
