Animal Science 233 Applied Animal Nutrition

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Animal Science 233Applied Animal Nutrition

• Dr. Michelle Tjardes
• 134 NPB
• 688-4139
• michelle_tjardes_at_sdstate.edu

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Introduction to Dr. Tjardes
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Introduction to Dr. Tjardes
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Introduction to Dr. Tjardes
M.S. in Monogastric Nutrition
B.S. in Animal Science
U of I
SDSU
Ph.D. in Monogastric Nutrition
Assistant Professor
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Introduction to Dr. Tjardes
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Introduction

• Review of the Syllabus

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Introduction

• On the index card please write the following
  information
• Name
• Major
• E-mail address (print clearly)
• Species of Interest
• Future Career Goals
• Why are you taking this class?
• Because it is required
• Other (Please Specify)

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What is Nutrition?

• And why is it important

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Introduction

• NUTRITION
• The series of processes by which an animal takes
  in and assimilates feed components for promoting
  growth, milk, or fiber production, and replacing
  worn or damaged tissue

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Introduction
NUTRITION
Study of
NUTRIETS
That come from
FOOD/FEED
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Introduction

• Some definitions to think about
• Food/Feed edible material that nourishes
• Foodstuff/Feedstuff material used as food/feed
• Diet/Ration mixture of food/feedstuffs used to
  supply nourishment to the animal
• Does not imply nutritionally balanced
• Balanced Diet/Ration nutritionally adequate
  mixture that meets animal nutrient requirements

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If you know nutrition you know

• Nutrient
• Function, Occurrence, Interactions
• Animals
• Behavior, Management, Physiology
• Chemistry and Biochemistry
• Crop and Soil Science
• Endocrinology
• Bacteriology
• Genetics
• Disease

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Nutrition

• Represents 60-80 of the cost of livestock
  production
• Large amounts of nutrients required to simply
  maintain weight, much less increase production or
  performance
• Insufficient nutrient intake results in decreased
  performance and at starvation levels, possible
  death
• Excessive nutrient consumption results in
  inefficient fat deposition

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Nutrition

• Animals have no specific requirement for a
  particular feedstuff
• Actual feeds consumed are much less important
  than the quantity and assortment of nutrients
  supplied by the feeds
• Feeds are merely carriers of nutrients and
  potential energy
• No feed has been found to be nutritionally
  complete

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What are Nutrients?
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Nutrients

• Definition Feed component that aids in the
  support of animal life
• Dietary Essential Nutrients
• Nutrients that must be included in the diet to
  support life and productivity
• Some not synthesized
• Some not synthesized in adequate quantities
• Dietary Non-Essential Nutrients
• Nutrients synthesized by animals in adequate
  quantities provided that appropriate precursors
  are available

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Animal Response to Essential Nutrients
Toxicity
Deficiency
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Animal Response to Non-Essential Nutrients
Potential Toxicity
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Nutrients

• Water
• Carbohydrates
• Lipids
• Protein
• Minerals
• Vitamins

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Sources of Nutrients

• Pasture, hay, forages
• Local grains
• Water tank
• Synthetic vitamins
• Minerals
• Synthetic amino acids
• Feed additives
• Imported grains/by-products