Paper presented at the 52nd CFCS Annual Meeting, Guadeloupe, July 10-16, 2016
PRELIMINARY OBSERVATIONS ON MILK COMPOSITION DUE TO THE INCLUSION OF SOLID PROBIOTIC INTO A DAIRY FEED IN COWS - A CASE STUDY Andell Edwards, Aphzal Mohammed, Hasani Stewart, Angelisah Khan, Shenese Sieuchand and Puran Bridgemohan The University of Trinidad and Tobago, Eastern Caribbean Institute of Agriculture and Forestry, Faculty of Biosciences; Agriculture and Food Technology, Caroni North Bank Road, Centeno Arima, Trinidad Correspondence aphzal.mohammed@utt.edu.tt Keywords: Celmanac milk composition, solid non fat, Druminske score Abstract The purpose of this study was to investigate the effect on milk composition of the inclusion of a fixed amount of solid prebiotic celmanac into a dairy feed before milking in lactating cows. Fourteen lactating cows, 3-4 mo lactating, were randomly equal in terms of approximate days into lactation, and allocated to one of two treatment groups: Control no Supplementation and Celmanax supplemented. Milk samples were collected every 7 days for approximately 8 weeks and sent to the lab for milk composition analysis and Draminski score testing. Cows supplemented with Celmanax had a higher (p<0.05) butter fat content (2.91%) when compared to the control (2.48%). SNF, protein & lactose percentages were lower (p<0.05) than the control Milk fat, SNF, or lactose percentages were not affected by treatment (P>.01) In conclusion, butterfat percentage was higher for cows supplemented with Celmanax than supplemented cows. Materials and methods Fourteen, 3-4 months into lactation cows were randomly, equal in terms of approximate days into lactation, and allocated to one of two treatment groups: Control no Supplementation and Celmanax supplemented .Cows were allowed 2 kg of 18% dairy ration to which was added 25 gm solid Celmanax each day before twice a day milking. Milk samples were collected every 7 days for approximately 8 weeks and analysed for milk composition and Draminski score testing. Composition of the milk from individual goats were analysed using a Lactoscan SP (Nova Zagora, 8900). Main results Cows supplemented with Celmanax had a higher (p<0.05) butter fat content (2.91%) when compared to the control (2.48%). Solid Non-Fat was higher (p<0.05) for the control group of cows (8.1%) when compared to Celmanax treated cows (7.63%). Celmanax treated cows had a lower (p<0.05) milk density (27.4%) when compared with the control group (29.4%). Similarly, protein was lower (p<0.05) for the Celmanax supplemented group (2.75%) when compared with the control group of cows (2.95%) (Table 1). Cows supplemented with Celmanax had significantly lower lactose content (4.19%) when compared to the control group (4.43%). The percent water was highest (p<0.05) in the Celmanax treated group of cows (7.56%) and lowest in the control group of animals. Similarly, the milk temperature was significantly higher for cows given Celmanax (29%). In contrast, the milk freezing point was higher (p<0.05) for cows in the control group (0.51%) when compared to the Celmanax supplemented group (0.48%). The milk salt levels was highest (p<0.05) for the control group of cows (0.66%) whereas milk conductivity was highest for the Celmanax supplemented group (5.64%). The Draminski score was lowest (p<0.05) among the Celmanax supplemented group (424) when compared to the control group (442).
Treat. Celmanx Control SEM
Fat 2.91a 2.48b 0.104
SNF 7.63a 8.1b 0.033
Dens. 27.4a 29.4b 0.170
Milk Composition (%) Prot. Lactose Water a a 2.75 4.19 7.56a b b 2.95 4.43 3.57b 0.011 0.018 0.308
Temp 29a 27b 0.078
FP 0.48a 0.51b 0.002
Salt 0.62a 0.66b 0.002
C 5.64a 5.28b 0.038
DS 424a 442b 3.19
Means in the same column within a parameter with different superscripts differ significantly; p<0.05 SNF – Solid Non Fat, Dens – Density, Prot – Protein, Temp – Temperature, FP – Freezing Point, C – Conductivity, DS – Draminski Score
ab
Table 1: The effect of Celmanax on the milk composition of dairy cows
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