engleski

The effects of multienzyme preparation on production results of fattening chicks fed rye-based diets

The effects of multienzyme preparation Polizym (amylase, protease, beta-glucanase, beta-glucosidase, cellulase) on production results of chick fed diets with different levels of rye (up to 60%) was investigated (280 Ross chicks, fattening period of 42 days). Chicks were divided into seven groups and held in cage-system with feed and water ad libitum. Over the first three weeks, all groups were fed starter for fattening chicks and afterwards a finisher. The control group was fed commercial maize-based mixtures. In diet for experimental groups maize was partially substituted by rye (6%, 30% and 60%). Experimental mixtures were used with or without addition of Polizym. The influence of rye and added preparation on body weight gain, feed conversion rate, amount of abdominal fat and litter moisture were examined. The results indicated that 30% and 60% of rye in diets decreased body weight gain (P<0.01), while 6% of rye in diet increased body weight gain (P<0.01) when compared to control group. Regardless of Polizym addition, higher proportions of rye (30% and 60%) increased the feed conversion rate and the amount of abdominal fat. Chicks fed 6% rye diet had lower feed conversion rate when compared to the control group and lower amount of abdominal fat, especially when fed with Polizym. Higher rye proportions increaced faeces moisture. Polizyme had positive effects in decreasing faeces moisture only in diets with 6% of rye. Rye in diets did not cause any health problem during the investigation.

nutrition; fattening chicks;rye; enzyme preparation Polizym; body mass gain; feed conversion; abdominal fat; litter moisture

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