Effect of concentrate to roughage ratio and baker's yeast supplementation during hot season on performance of lactating buffaloes
Abstract: Sixteen lactating buffaloes after 8 weeks of calving in the 2nd to 5th lactating season, weighing 500 to 600 kg during summer season used in complete switch-back design (Lucas, 1956) with four groups and three successive experimental periods. Buffaloes in the first and second groups were fed ration consisting of 60% concentrate feed mixture and 40% roughage (berseem hay and rice straw) without (G1) or with 15 g baker's yeast (Saccharomyces cerevisiae) / head / day (G2) on DM basis. While those in the third and forth groups were fed ration consisting of 40% concentrate feed mixture and 60% roughage (berseem hay and rice straw) without (G3) or with 15 g barker's yeast / head / day (G4) on DM basis. The obtained results showed that the contents of dry matter (OM), organic matter (DM), crude protein (CP), ether extract (EE) and nitrogen free extract (NFE) tended increased; their digestibilities and total digestible nutrients (TDN) and digestible crude protein (DCP) values increased significantly (P<0.05), however, the contents CF and ash tended to decrease and CF digestibility decreased significantly (P<0.05) with increasing the level of concentrate and decreasing roughage level. While, the digestibilities of all nutrients and nutritive values increased significantly (P<0.05) with barker's yeast supplementation. The intake of DM. TDN and DCP increased significantly (P<0.05) with increasing the level of concentrate and decreasing roughage level. While. the intake of TDN and DCP increased significantly (P<0.05) with baker's yeast supplementation. Ruminal pH value decreased significantly (P<0.05), while ruminal total volatile fatty acids (TVFA's) and ammonia nitrogen (NH3-N) concentrations increased significantly (P<0.05) with increasing the level of concentrate. However, ruminal pH value and NH3-N concentration decreased significantly (P<0.05) and TVFA's concentration increased significantly (P<0.05) with baker's yeast supplementation. The yield of actual milk increased significantly (P<0.05) with increasing the level of concentrate. while the yield of 7% fat corrected milk (FCM) increased significantly (P<0.05) with increasing the level of concentrate as well as with baker's yeast supplementation. The contents of protein, lactose and SNF increased significantly (P<0.05), however, fat content decreased significantly with increasing the level of concentrate and decreasing the level of roughage. While, the contents of all milk constituents except ash increased significantly (P<0.05) with baker's yeast supplementation. The amounts of DM. TDN and DCP per kg 7% FCM increased significantly (P<0.05) with increasing the level of concentrate and decreasing the level of roughage in the rations, but decreased significantly (P<0.05) with baker's yeast supplementation. The average daily feed cost and feed cost per kg 7% FCM increased significantly (P<0.05), however economic efficiency decreased significantly (P<0.05) with increasing the level of concentrate and decreasing the level of roughage in the rations. Average daily feed cost tended to increase, but the output of 7% FCM and economic efficiency increased significantly (P<0.05), while feed cost per kg 7% FCM decreased significantly (P<0.05) with baker's yeast supplementation. It could be concluded that lactating buffaloes fed ration consisted on DM basis of 40% concentrate feed mixture and 60% roughage (berseem hay and rice straw) with 15 g baker's yeast supplementation/head / day (G4) showed the beast results concerning milk yield, feed conversion and economic efficiency.
Key words: Lactating buffaloes. concentrate: roughage ratio. baker's yeast, digestibility. rumen fermentation activity. milk yield, feed conversion and economic efficiency.
Publication year 2009
Pages 188-195
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
serial title Slovak Journal Animal Science
Author(s) from ARC
External authors (outside ARC)
    محمد ابراهيم بسيونى جامعة كفر الشيخ
Agris Categories Animal feeding
AGROVOC
TERMS		 Digestibility. Economic analysis. Feed conversion efficiency. Milk yield. Water buffaloes.
Proposed Agrovoc rumen fermentation activity;baker's yeast;concentrate: roughage ratio;Lactating butfaloes;
Publication Type Journal
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