Composition & Classification of Feedstuff

Composition & Classification of Feedstuff Eight Classes of Feedstuff 1. Dry roughages 2. Succulent roughages (pasture and range grasses) 3. Ensiled roughages 4. High energy concentrates 5. Protein concentrates 6. Minerals 7. Vitamins 8. Additives Dry Roughages Bulky feed that ha...

Composition & Classification of Feedstuff Eight Classes of Feedstuff 1. Dry roughages 2. Succulent roughages (pasture and range grasses) 3. Ensiled roughages 4. High energy concentrates 5. Protein concentrates 6. Minerals 7. Vitamins 8. Additives Dry Roughages Bulky feed that has low weight per unit volume High crude fiber content; low protein and fat digestibility A feed is classified as a roughage if it contains > 18% crude fiber and 70% total digestible nutrients Dry Roughage Examples Hay Straw & Chaff Sugarcane bagasse Corn cobs Cottonseed hulls Succulent Roughages Pasture grasses (natural & cultivated) Legumes (fresh) Tree leaves Roots & tubers Silages & Haylages Fermented high moisture feed made from plant material Silage (20 – 45% DM) Haylage (50 -75% DM) High Energy Concentrates Cereal grains & milling by-products of cereal grains Molasses Animal & vegetable fat Protein Concentrates/Supplements Contain > 20% Crude Protein (CP) Oil seeds and their meals (e.g. SBM, Copra meal) Animal, avian, and marine sources (e.g. Fish meal, meat meal) Milk and milk by-products Brewery and distillery by-products Urea, ammonia Vitamins & Mineral Supplements Must be added by sources that animal is able to absorbed Vitamin concentration in plant and animal tissues varies greatly Plants: Vitamin concentrations affected by harvesting, processing, and storing Animals: Liver and kidney are good sources of vitamins Feed Additives Non-nutritive ingredients added to stimulate growth or performance or improve efficiency of feed Added in very small quantities Antibiotics, antifungals, and antimicrobials Probiotics, buffers Colours, flavours Hormones, Enzymes