Production of beef from artificially reared dairy breed calves on sugarcane based diets
1988
Garcia, G.W. | Neckles, F.A. | Lallo, C.H.O. (Sugarcane Feeds Centre, Longdenville (Trinidad and Tobago))
The effects of zero grazing animals on broken rice at 0, 5 and 10 % of the diet dry matter (DM), diets 1, 2 and 3 respectively in a ration of freshly chopped sugar cane (50-55 % on a diet DM basis), molasses, and a urea-containing maize and soyabean meal protein supplement were studied. On attainment of 300 kg liveweight, animals fed on diet 1 were separated into 2 groups, the first of which was maintained on the original diet, the second group was fed a lower-forage, high-energy "finishing" diet. The trials were subjected to an economic evaluation in terms of income over feed cost (IOFC) analysis. The results show that dressing percentages were similar for all diets. Diets 2 and 3 gave positive IOFC up to 300 kg liveweight. Animals fed with 0 % broken rice had an overall negative IOFC, even though "finishing" animals gave positive IOFC up to 350 kg only. From this trial a sugar cane life-cycle feeding (LCF) model was developed in which sugar cane would be fed in small quantities to animals of lower liveweight and increased to 50 % of the diet DM for the higher liveweights. The model is based on the relationship that as the percentage of sugar cane in the diet is increased, average daily gain and milk production decreased. Finishing animals on high-energy, low-sugar cane diets did not increase dressing out percentages. Refinements of the LCF model was aimed at lowering the cost of liveweight gain or increasing IOFC costs through an improvement of the feed conversion efficiency and lowering the cost of feed. For a year-round sugar cane feeding system, there will be need for conservation i.e. silage production
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