Transcript Protiens
An Agriscience Lesson Plan: Protein Needs Objectives: • Understand the amounts and kinds of protein needed in feeding livestock • Learn the essential amino acids and their functions Important factors in feeding protein: • • • • The amount of protein The quality of protein The compliment of amino acids in protein Can feed less of high quality protein and vice versa Excess Protein • No danger in over feeding protein, but it is usually the most expensive part of the feed • Once the animal has consumed all the protein needed for cell construction, muscle, fetal growth, etc., the rest is broken down for energy • Carbohydrates are a cheaper source of energy Ten essential amino acids • • • • • Arginine Histidine Isoleucine Leucine Lysine • • • • • Methionine Phenylalanine Threonine Tryptophan Valine Amino Acids • The ten essential amino acids are those which are not made in the body or not made in sufficient amounts and have to be supplemented in feed • A pneumonic for remembering the essential amino acids is PVT. TIM HALL Factors in the requirements of amino acids for animals • The kind of animal • Function of the animal (ie. Work, weight, etc. • Amino acids essential for growth are not essential for maintaining the animal Protein in the rations of ruminants • All of the essential amino acids are made in ruminants by the rumen bacteria from simple forms of Nitrogen in the feed • The bacterial protein may provide all of the essential amino acids even though they are lacking in the feed the ruminant eats Urea • Used as a protein substitute for ruminants • Source of Nitrogen that rumen bacteria can use to make protein • Urea is used only in ruminant rations, it is toxic to monogastrics Protein from animals • • • • Fish meal Meat and bone meal milk blood meal Protein from plants • • • • • Soybean oil meal Soybeans Cottonseed meal Canola Legumes Protein and maturity of the animal • Young animals have a greater need for protein because they are building new tissue as they grow • Lactation and pregnancy require higher amounts of protein • As animals mature the daily feed intake increases and the protein concentration decreases Web sites: • • • • Www.galaxy.com nal.usda.gov.com www.ag.usask.ca/ public.gov.nf.ca/