Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

CABI Book Chapter

Sheep nutrition.

Book cover for Sheep nutrition.

Description

The principles of nutrition and nutritional management of grazing sheep are discussed in terms of feeding for maintenance, during conception and pregnancy, during lactation, for sheepmeat production, and for sheep under rangeland conditions. The book elaborates on the nutritive value of herbage, deleterious substances in grazed pastures, food preferences, constraints on feed intake, principles of ...

Chapter 15 (Page no: 333)

Deleterious substances in grazed pastures.

The following chapter reviews forage toxins from a grazing perspective, identifies some major causes of ill health and poor productivity in sheep, considers the impact of intensive grazing practices on the incidence of these, and examines the role of the rumen and tissues in altering the toxicology of certain compounds. Phytotoxicities, particularly photosensitization, plant oestrogens, cyanogens, condensed tannins, oxalates, and nitrate-nitrite, in improved forages, as well as species-specific toxicoses involving Phalaris aquatica, annual ryegrass Lolium rigidum, kikuyu Pennisetum clandestinum, and brassicas, are discussed. Facial eczema (pithomycotoxicosis) due to Pithomyces chartarum, ryegrass staggers, tall-fescue Festuca arundinacea toxicoses, paspalum Paspalum dilatatum staggers, lupin Lupinus cosentinii and Lupinus angustifolius mycotoxicosis are some of the forage mycotoxicoses presented.

Other chapters from this book

Chapter: 1 (Page no: 1) Nutritive value of herbage. Author(s): Coleman, S. W., Henry, D. A.
Chapter: 2 (Page no: 27) Constraints on feed intake by grazing sheep. Author(s): Weston, R. H.
Chapter: 3 (Page no: 51) Food choice. Author(s): Forbes, J. M., Mayes, R. W.
Chapter: 4 (Page no: 71) Microbial ecology of the ovine rumen. Author(s): Mackie, R. I., McSweeney, C. S., Klieve, A. V.
Chapter: 5 (Page no: 95) Digestion and metabolism. Author(s): Annison, E. F., Lindsay, D. B., Nolan, J. V.
Chapter: 6 (Page no: 119) Principles of supplementary feeding in sheep-grazing systems. Author(s): Dove, H.
Chapter: 7 (Page no: 143) Nutrition for maintenance. Author(s): Corbett, J. L., Ball, A. J.
Chapter: 8 (Page no: 165) Nutrition and wool growth. Author(s): Hynd, P. I., Masters, D. G.
Chapter: 9 (Page no: 189) Nutrition for conception and pregnancy. Author(s): Robinson, J. J., Rooke, J. A., McEvoy, T. G.
Chapter: 10 (Page no: 213) Nutrition during lactation. Author(s): Treacher, T. T., Caja, G.
Chapter: 11 (Page no: 237) Nutrition for sheep-meat production. Author(s): Oddy, V. H., Sainz, R. D.
Chapter: 12 (Page no: 263) Nutrition of sheep under rangeland conditions. Author(s): O'Reagain, P. J., McMeniman, N. P.
Chapter: 13 (Page no: 285) Trace-element and vitamin nutrition of grazing sheep. Author(s): Lee, J., Knowles, S. O., Judson, G. J.
Chapter: 14 (Page no: 313) Interactions between gastrointestinal parasites and nutrients. Author(s): Coop, R. L., Sykes, A. R.
Chapter: 16 (Page no: 357) The nutritional management of grazing sheep. Author(s): Freer, M.