Basics to Small Farm Beef Cow Nutrition Adam Hady Agriculture Agent Richland County UWEX Prepared by : Goran Rebwar Basics to Beef Cow Nutrition

Key Nutrients Six Basic Nutrients Six Basic Nutrients Water Water Protein Protein Carbohydrates Carbohydrates Fats Fats Minerals Minerals Vitamins Vitamins

Nutrient Requirements The amount of nutrient that an animal needs to perform a specific purpose. Determined by: weight, sex, age, growth rate, stage of production. Determined by: weight, sex, age, growth rate, stage of production.

Nutrient Composition Nutrient composition is the amount of nutrients found in the feed source. Nutrient Composition can be obtained from book values, which are just an averages for a feed, or you can have a feed analysis done.

Nutrient Composition Common information on the composition table for a feed stuff are: Dry matter Dry matter Crude Protein Crude Protein Energy Energy Fiber Fiber Minerals Minerals Feed Analysis

Dry Matter The % of a feed stuff that is not water. For example: If hay is 88% dry matter then a 45 pound bale of hay would be 39.5 lbs of dry matter. Rations will come in as pounds of dry matter (DM) or As Fed

Crude Proteins Crude Protein in beef cow rations come primarily from the forage in the diet. Crude Protein in beef cow rations come primarily from the forage in the diet. Pasture grass and forages are an excellent source of protein Pasture grass and forages are an excellent source of protein There are also many protein supplements (feed that contain over 20% crude protein) There are also many protein supplements (feed that contain over 20% crude protein) Crude protein is determined by the amount of Nitrogen (N) in a feed multiplied by 6.25 Crude protein is determined by the amount of Nitrogen (N) in a feed multiplied by 6.25

Energy Energy is defined as the capacity to do work. In animal nutrition is determined by biological heat production Calories (cal), Kilocalorie (kcal), or Megacalorie (Mcal)

Energy Common measurements of energy in ration formulation Gross Energy (GE) – total amount of energy in a feed source Gross Energy (GE) – total amount of energy in a feed source Digestible Energy (DE) – Energy absorbed by the animal after consumption Digestible Energy (DE) – Energy absorbed by the animal after consumption Metabolizable Energy (ME) – Energy that is available through feed consumption Metabolizable Energy (ME) – Energy that is available through feed consumption Net Energy (NE) – Similar to DE and ME Net Energy (NE) – Similar to DE and ME Total Digestible Nutrients (TDN) – A method that calculates energy based on crude protein and fiber. Total Digestible Nutrients (TDN) – A method that calculates energy based on crude protein and fiber.

Energy Sources: Starch, fats, cellulose and proteins Starch, fats, cellulose and proteins Majority of energy in beef cattle rations is the cellulose in forage. Majority of energy in beef cattle rations is the cellulose in forage.

Fiber Estimates the amount of carbohydrate found in plants. Unlike monogastrics, cattle utilize microbes in the rumen to breakdown the fiber, therefore providing energy to the animal.

Minerals and Vitamins Minerals: Minerals: Two categories macro and micro minerals Crystalline substances that can not be synthesized in the animal. They provide the foundations for structure and function in the animal

Minerals and Vitamins Vitamins: Two categories water soluble and fat soluble Two categories water soluble and fat soluble Some vitamins can be synthesized in the body others can not. Some vitamins can be synthesized in the body others can not. They provide the foundations for structure and function in the animal They provide the foundations for structure and function in the animal

How Nutrients are Used Maintenance Maintenance Lactation Lactation Growth Growth Reproduction Reproduction In order of priority for the cow

Questions ????? Presenter INFO: Adam Hady Agriculture Agent UWEX- Richland County 01/07 ThanksForAttention