Livestock Research for Rural Development 17 (9) 2005
نویسندگان
چکیده
Feeding and digestibility trials with growing-finishing pigs were carried out to investigate the effects of liquid feed and fermented liquid feed on live weight gain, feed conversion ratio, nutrient digestibility and plasma urea nitrogen (PUN). The treatments were: a basal diet (BS, dry feed), non-fermented liquid feed (NFLF, water added immediately before feeding), fermented liquid feed (FLF, fermented broken rice) and lactic acid feed (LAF, produced by adding lactic acid to get pH 4). All treatments were balanced for sex (gilts and castrated male pigs). The experiment was designed as a complete block, with 5 replicates, with one individually-fed pig per replicate, to give a total of 20 animals, amnd lasted 3 months. During the growing phase, daily gains (kg/day) of pigs given diets FLF (0.572) and LAF (0.567) were similar and higher than those on BS (0.515) and NFLF (0.498) (P<0.05). Due to the effects of season, overall performance of the pigs was reduced and daily gains were not different (P>0.05) among diets. However, daily gains on LAF (0.641 kg) and LAF (0.676 kg) tended to be higher than those of BS (0.577 kg) and NFLF (0.558 kg) during the finishing phase. As consequence, during growing phase feed conversion ratio (FCR) of diet FLF (3.04) was lower (P<0.04) than BS diet (2.39), NFLF (3.72) and LAF (3.43). For finishing phase, FCR was similar among diets (P>0.05). Organic matter and protein digestibility were significantly higher (P<0.05) in diet FLF as compared to the other three diets. PUN of pigs on FLF was significantly lower than of those on BS, NFLF and LAF (P<0.05). Back fat thickness was similar among diets. It was concluded that fermented liquid feed improved performance, and diet digestibility and reduced PUN in growing pigs.
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