Comparing effects of organic acid (Malate) and yeast culture as feed supplement on dairy cows performance
Abstract: This study was conducted to compare the effect of two chemical forms of malate supplementation (malic acid and a commercial malate salt) and a natural feed additive (yeast culture) in rations of lactating crossbred Friesian cows on nutrients digestibility, nutritive values, milk yield, milk composition, blood metabolites and economical return of the tested rations. Sixteen lactating crossbred Friesian cows averaged 496.06 ± 1.51 kg live body weight (LBW) at the 3rd and 4th parities were assigned after parturition to four similar groups (4 animals each). Animals were fed concentrate feed mixture and berseem hay at the rate of 70: 30 % on DM basis (as a basal ration). The first group was a control group (C) fed a basal ration without feed additive, the second group (MA) was fed the basal ration supplemented with 10 g/h/d of malic acid, the third group (YC) was fed a basal ration plus 10 g/h/d of yeast culture (Saccharomyces Cerevisiae 1X 109 CFU/g) and the fourth group (MS) was fed a basal ration supplemented with 10 g/h/d of malate salt during 75 days of lactation period. Results indicated that rations supplemented with malic acid (MA) and Yeast culture (YC) increased significantly (P<0.05) DM and OM digestibilities in comparison with C ration and MS ration. Malic acid supplementation decreased significantly (P<0.05) CF digestibility and significantly (P<0.05) increased NFE digestibility as compared to control and other additives rations. There were no significant differences among animals fed rations supplemented with MA, YC and MS in both values of CP and EE digestibilities. The nutritive values as TDN % and DCP% showed that C ration had (P<0.05) the lowest value than the other supplemented rations, while, the ration supplemented with YC had the highest value followed by MA and MS rations. Milk yield and fat corrected milk (4% FCM) of dairy cows increased by (10.36% and 8.31%) for MA, (6.83 % and 4.84 %) for YC and (6.17 % and 4.89 %) for MS supplementation, respectively, compared to the control group. Animals fed MA ration had greater milk persistency till the 10th week of lactation period followed by those fed MS and YC rations, respectively. Milk content of fat, lactose and TS were significantly (P<0.05) lower in cows fed rations with MA, YC and MS when compared with those fed control ration. There were no significant differences among groups in milk protein, SNF and ash percent. Feed efficiency values as kg 4% FCM per one kg DM, TDN or DCP were higher with MA, MS and YC rations than that of C ration. Blood parameters were in the normal physiological ranges with no adverse effect on dairy cows health. Economic efficiency value was the highest with YC followed by MS while, MA had the lowest value as compared to the control ration C.
Publication year 2011
Pages 132-140
Availability location معهد بوث الانتاج الحيوانى- شارع نادى الصيد- دقى- جيزة
Availability number
Organization Name
serial title Nature and Science, 2011
ISSN 1545-0740
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Blood. Blood composition. Cows. Digestibility. Malates. Malic acid. Milk yield. Yeasts.
Proposed Agrovoc nutritive values;
Publication Type Journal
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