Sheep nutrient requirements

National Research Council, Nutrient Requirements of Sheep, 6th rev. ed.. National Academy Press, Washington, D.C., 1985. 

Great care has to be taken in fixing the scale of scrutiny for a product. If nutrient is fed to animals in the form of cake mixture and the assumption is made that the daily nutrient intake should be nearly constant then the scale of scrutiny of the nutrient mixture would be that of the animal s daily consumption. In the case of the animal nutrient the scale of scrutiny would depend on the consumption of the animal being fed. A suitable feed for a sheep would require a smaller scale of scrutiny than that for a cow. If it was decided that a weekly, rather than daily, intake of nutrient was critical then the scale of scrutiny would increase. It could well be that in this case the scale of scrutiny would be determined not so much by the animals requirements but by the marketing requirement of having a product of uniform appearance. An almost identical analysis of scale of scrutiny could be carried out on the mixture requirements for a pharmaceutical tablet. 

NRC, 2007. Nutrient Requirements of Small Ruminants Sheep, Goats, Cervids, and New World Camelids. National Research Council. The National Academies Press, Washington, USA, 362 pp. 

National Research Council Nutrient Requirements of Domestic Animals, Nutrient Requirements of Sheep, National Academy of Sciences-National Research Council, Washington, DC, 1985. 

The nutrient requirements of farm animals have been discussed in earlier chapters. Here, some selected values from these chapters are compared with the nutrient requirements of human beings and their companion, the dog. Table 25.1 summarises the requirements of 30 kg growing individuals of the species, sheep, pig, dog and man, and Table 25.2 gives values for three of these species in a state of maintenance. 

The nutrient requirements of man may be compared with those of domestic animals, exemplified by the dog, pig and sheep. Requirements of growing animals differ considerably between species, mainly because of differences in growth rate, but those for adult maintenance are less discordant. 

National Research Council, 1985. Nutrient requirement of sheeps 6 ed. Washington National Academy Press, 99 p. Russel, A.J.E, 1982. Nutricion de las ovejas gestantes. In Maluenda, P.D. (ed.) Manejo e enfermedades de las ovejas. Zaragoza Acribia 225-242. 

Cannas, A., 2000. Sheep and cattle nutrient requirement systems, ruminal turnover, and adaptation of the Cornell Net Carbohydrate and Protein System to sheep. Ph.D. dissertation, Cornell University, Ithaca, NY, USA, 337 pp. 

By housing cattle overwinter and composting the farmyard manure, the organic farmer has ready access to a balanced fertiliser that can be spread where most required. The grazing animal does not actually import fertility onto the farm but it does recycle nutrients where it grazes and provides a source of manure when housed. This is as true of sheep, pigs and poultry as of cattle. The only problem with outdoor pigs is that they tend to rip up pastures. 

MOLYBDENUM (In Biological Systems). Molybdenum is required in very low amouni.s by both plants and animals Nutrient imbalances involving molybdenum and copper have caused serious problems in cattle and sheep production. 

Agricultural and Food Research Council 1991 Technical Committee on Responses to Nutrients, Report no. 6. A reappraisal of the calcium and phosphorus requirements of sheep and cattle. Nutrition Abstracts and Reviews, Series B 61 573-612. 

Caimas, A., L.O. Tedeschi, A.S. Atzoriand D.G. Fox. 2006. Prediction of energy requirements for growing sheep with the Cornell Net Carbohydrate and Protein System. In J. Dijkstra (ed.), Nutrient Digestion and Utilization in Farm Animals. CABI Publishing, Cambridge, MA 99-113. 

The SRNS and the UCDS growth models were integrated into a new model to account for the effects of variations in feeding level on nutrient utilization, energy and protein requirements, and composition of the gain of growing sheep. 

---