1- Nutrition PowerPoint

B85 Animal Nutrition

Lesson OutlineIntroductionThe Six Major Classes of NutrientsFeed additives

Infovets Educational Resources www.infovets.com Slide *

IntroductionMany health, reproductive and production problems can be prevented with good nutrition. Poor nutrition results in:Poor conception ratesLower calf cropPoor weaning weightsDifficult birthsHigher feed bills because of over feedingMore infectious disease due to decreased immune system protection


IntroductionThere are only two sources where an animal can obtain energy.One is from the food it ingests.The other is from the energy stored in its body in the form of fat.


IntroductionA lot of research has gone into the development of feeds that give animals exactly what they need to remain healthy and to perform at their peak.As animals grow and mature, their nutritional needs change.Younger animals need diets high in protein. As the animal matures, the animal needs a diet higher in carbohydrates.Breeding animals nutritional needs change according to their production cycle.


IntroductionStage of Production Calving to breeding

Breeding to weaning

Mid Gestation

Late Gestation

Nutritional Requirements Highest

Moderate

Lowest

High


Six Major Classes of NutrientsWaterProteinCarbohydratesFatsVitaminsMinerals


WaterWater is the cheapest nutrient. It provides the basis for all fluid in the animals body.Water is used in the blood supply.Digestion requires moisture for the breakdown of nutrients.Water is needed in the movement of feed through the digestive track and in flushing the animals body of waste. Water is needed to produce milk.It helps regulate the animals body temperature.


WaterOver 80% of the animals body is composed of water.A loss of 20% will result in death of the animal.Animals generally need about 3 pounds of water for every pound of solid feed they consume.The average cow will consume 12 gallons of water per day. Some water comes in the feed itself, such as in succulent green pasture forages and silage.


WaterAnimals water needs change.A horse working hard in hot weather will need more water intake to replenish water lost.A animal that is lactating requires a lot more water to produce milk for its young.


ProteinProtein can make up 15- 16 percent of an animals diet, and usually is the most costly part of a ration.Protein is composed of compounds called amino acids.Amino Acids are used to build muscle, skin, hair, bones, and body tissues.All of the enzymes and many hormones in the bodies of animals are composed of proteins.


ProteinAs is the case with water, some animals need more protein in their diets than do others.Young rapidly growing animals need more protein than do mature animals.A cow that is giving large amounts of milk needs more protein than an animal that is not lactating. There are over 20 different types of amino acids. There are ten that are essential that the animal must obtain from its feed.


Essential Amino AcidsArginineHistidineIsoleucineLeucineLysineMethioninePhenylalanineThreonineTryptophanValine


ProteinAnimals may not be able to digest all of the protein in a particular feed. The total amount of protein in a feed is called the crude protein.Crude protein is calculated by analyzing the nitrogen content and multiplying that percentage by 6.25.Digestible protein is the protein that can be digested in the feed and used by the animal.Digestible protein is usually abut 50% 80% of the crude protein.


ProteinProtein content varies, depending on the type of feed.Corn has about 8% protein. A growing pig needs about 16% protein. Corn alone will not give the pig an adequate amount of protein to sustain growth.Carnivores like dogs and cats get almost all of their protein from meat.


Balancing Protein in a RationModern livestock operations no longer just balance a feed ration based on the percent of protein.Now the feed formulas are based on the types and amounts of amino acids that are needed by a particular group of animals.The process of balancing feed rations based on amino acid contents is so complicated that it is done by computers.Two types of feed may have the same percentage of protein but have different percentages of the essential amino acids. A different amino acid is needed for growth than is needed for milk production.


CarbohydratesThe main source of energy from animals comes from carbohydrates.Carbohydrates are compounds made of carbon, hydrogen, and oxygen. They include sugars, starches and cellulose.Carbohydrates come from plants. By weight, plants are composed of about 75% carbohydrates. (Primarily cellulose which makes up the cell walls of plants.)


CarbohydratesStarch is generally found in grain. It is used by the plant as energy storage for the seed. Starches are composed of sugars, and as digestion occurs, the starch is broken down into sugar.Sugars fall into two categories:Monosaccharides or simple sugarsDisaccharides or complex sugarsSimple or complex refers to the chemical composition of the sugar and the different ways the molecules are formed.


Simple SugarsGlucose is the most simple of all sugars and is found in a low concentration in plant materials. It is also the major energy source found in an animals blood. The animals body breaks down some of the other sugars into glucose. Fructose is found in fruits and honey and is the sweetest of all the sugars.Common table sugar (sucrose ) is a disaccharide composed of fructose and glucose. Lactose is milk sugar.


Simple SugarsCellulose is the portion of cell walls that gives the plant its rigid structure. The enzymes in an animals digestive system cannot break down cellulose. However, some animals have microorganisms in their digestive system that break down the cellulose fiber so the enzymes can digest the material. Fiber is important in maintaining good health and proper rumen function.


Sources of CarbohydratesThe most important source of carbohydrates for animals is grain. Grain is also known as concentrates because of the high concentration of carbohydrates which are high in energy.Forages fed to animals are called roughages because of the amount of fiber in the diet. Roughages are generally low in net energy.


FatsFats are part of a group of organic compounds known as lipids.These compounds will not dissolve in water.Cholesterol is included in this category of organic compounds.Fats are found in both plants and animals.They contain about 2.25 times the energy of carbohydrates.They serve as concentrated storage places for excess energy.When the body does not take in enough energy to perform the normal functions, these reserves of fat are used.


FatsCertain acids referred to as essential fatty acids are also derived from fats.These acids are necessary for the production of some hormones.The most important sources of fats in feed for agriculture animals are the grains that contain oil, such as corn and soybeans.


MineralsMinerals are the only group of nutrients that are inorganic.Although they provide only a small portion of the total feed intake, they are vitally important.Bones are formed by a combination of calcium and phosphorus.Eggshells are mainly composed of calcium.Minerals aid in the construction of muscles, blood cells, internal organs and enzymes.Animals with a deficiency in minerals never develop properly and are more susceptible to disease.


MineralsMinerals are also divided up into two categories:Macro minerals: Required in larger amounts in the diet.Micro minerals or trace minerals: Required in very small amounts in the diet.


Macro MineralsThere are seven essential macro minerals:Calcium ChlorineMagnesiumPhosphorusPotassiumSodiumSulfur


Micro MineralsThere are nine essential micro minerals:CobaltCopperFluorineIronIodineManganeseMolybdenumSeleniumZinc


MineralsMinerals make up 3-5% of the body.Of that 3-5%, calcium makes up one-half of the bodys minerals.Phosphorus makes up about one-fourth of the bodys minerals.Calcium and phosphorus make up the largest portion (75%) of the total mineral content in the body.


MineralsMinerals are often fed free choice. Animals are given free access to the minerals and allowed to eat all they want.This is done in a mineral box or trough or by using salt blocks.Essential minerals are in the block and the animals take in the minerals as they lick the block for salt.


VitaminsVitamins are used in small amounts but are essential for life.They are used in the normal body processes of growth, production, and reproduction.They are vitally important in providing the animal with the ability to fight stress, disease and maintain good health.


VitaminsThere are 16 known vitamins.The B vitamins and vitamin C are water soluble.Fat soluble vitamins are A, D E, and K.


Vitamin AVitamin A is not found in feed but is converted by the animals body from carotene which is found in green leafy forages from pastures, hay and silage.Vitamin A can be stored in fats and the liver for many months and will be used when forage quality is low.Supplementation is common for ruminants and swine.


Vitamin D & EVitamin D and E are referred to as the sunshine vitamins.Both animals and plants use ultraviolet light to manufacture vitamin D.Animals in total confinement often receive supplements of vitamin D.Cereal grains and green forage supply vitamin E.


Vitamin BCattle dont need as much vitamin B because microorganisms in the stomach of the cow make their own.They can also make some proteins if given the right kind of nitrogen.


Vitamin BThiamine is a coenzyme in energy metabolism. Sources include green forage, well cured hays, and cereal grains. It is synthesized in the rumen.Riboflavin is important as a part of two coenzymes that function in energy and protein metabolism. Riboflavin is added to swine rations and may be needed in ruminant rations.Niacin is part of an enzyme system essential in the metabolism of fat, carbohydrates and proteins. Niacin in grains is largely unavailable to non ruminants and supplementation is often needed.


Vitamin BFolic acid is needed in body cell metabolism.B12 functions as a coenzyme in several metabolic reactions and is an essential part of red blood cell maturation. Most swine rations are supplemented with vitamin B12.Vitamin C is essential in the formation of the protein collagen. Vitamin C is found in citrus fruits, green leafy forages and well cured hays. Animals normally can synthesize sufficient quantities to meet their needs.


Feed AdditivesAntibiotics: disease preventionCoccidiostats: control parasitesXanthophyll: makes egg yolks yellowHormones: increases growthTranquilizers: calms nerves (cattle, turkeys)Antioxidants: prevents feed from getting rancidPellet Binders: keeps feed in pellet formFlavoring Agents: makes feed taste better

Date post:	08-Mar-2016
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