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Cottonseed cake vs. urea molasses complex feeding 2. effect on milk production feed conversion efficiency and cost of milk production in sahiwal cows bos indicus



Cottonseed cake vs. urea molasses complex feeding 2. effect on milk production feed conversion efficiency and cost of milk production in sahiwal cows bos indicus



Indian Journal of Animal Sciences 51(5): 508-513



The effects of feeding concentrate rations containing free and molasses-bound urea on milk production, milk composition, feed-conversion efficiency and the cost of milk production in Sahiwal cows (B. indicus) were described. The concentrate mixtures met .apprx. 80% of the total N requirement. The balance of N requirement, as also the energy and DM (dry matter) requirement, were met by feeding 10-15 kg green maize (Zea mays) and ad lib wheat straw. The results are based on the analysis of covariance applied between milk yield and the stage of lactation. The average yield of 4% fat-corrected milk (FCM) during 10 wk treatment period in T1 (cottonseed-cake), T2 (free urea) and T3 (bound urea) was 10.71, 9.26 and 9.14 kg, respectively. The difference between the 2 urea-fed groups was non-significant. The percent values of fat, protein, SNF (solids-not-fat) and total solids of milk for the 3 treatments were quite similar. The values of DCP (digestible crude protein) (29, 32 and 34 g) and TDN (total digestible N) (277, 273 and 267 g) intake per kg of FCM were also non-significantly different in the 3 groups. Milk production efficiency was 34.2, 30.6 and 31.0 in T1, T2 and T3, respectively. The respective figures for the feed cost of milk production on 4% FCM basis were 40, 43 and 41 paise/kg. Animals fed molasses-bound urea converted (non-protein N) of the ration into milk protein more efficiently. The urea and NH3 levels of blood in the molasses-bound urea-fed group tried to return to normal after 4 h of feeding; the free urea-fed group showed a continuous rise in respect of these N fractions.

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