Livestock Studies 2020, Vol 60, Num, 2     (Pages: 37-45)

The effects of adding inactive yeast culture (Saccharomyces Cerevisiae) to rations prepared with different quality roughages on fattening performance, nutrient digestibility, some rumen parameters and carcass yield in lambs

Duygu Budak 1 ,Aydan Yılmaz 2

1 Aksaray University, Faculty of Veterinary Medicine, Department of Zootechnical and Animal Nutrition, Aksaray, Turkey
2 Ankara University, Faculty of Agriculture, Department of Feeds and Animal Nutrition, Ankara, Turkey
DOI : 10.46897/livestockstudies. 846383 Viewed : 712 - Downloaded : 376 This study was performed with the participation of 26.22±1.07 kg average weighted 36 singleton lambs. 6 Groups were formed; 3 with IYM (7 g/day) and 3 without IYM. Lambs were kept in individual divisions and given 150 g/day roughage (alfa alfa hay (AH), meadow hay (MH), wheat straw (WS), concentrated feed and water ad libitum. Treatment lasted 70 days in total; temperature and humidity were recorded daily. Fattening performance, carcass parameters and ruminal pH levels were not affected by the treatment (P>0.05). Additive increased the weight of the hearts which were fed with AH (P<0.05). Effects of roughage and additive interactions on the acetic, propionic and volatile fatty acids was found as significant (P<0.01). IYM, increased the rates of acetic acid/propionic acid feeding with AH and MH (P<0.05). Ammonia concentration and digestibility of crude cellulose and hemicellulose was affected by the type of roughage (P<0.05). Digestibility of acid detergent fibre (P<0.01) and cellulose (P<0.001) was increased with additives. There is no difference among the groups in terms of water consumption (P>0.05). It`s concluded that, temperature and humidity is an efficient environmental factor on the fattening performance and IYM have positive effects on some cell-wall components digestibility and rumen parameters. Keywords : Roughage Inactivated yeast Digestibility Rumen parameters Temperature Lamb