Nutrition Flashcards
Define nutrition
the study of how animals consume, digest, transport, metabolize, and excrete nutrients.
What is the ruminant’s digestive system composed of?
Composed of 1.Reticulum 2.Omasum 3.Rumen 4.Abomasum 5.Small intestine 6.Large intestine 7.Cecum
What do cattle eats
Byproducts that humans generate
What do you need to formulate a diet in ruminants
Energy and Nitrogen
What is the omasum (3rd compartment) in ruminant digestive system?
Absorption of water
- manyplies
- stockman’s bible
What is the abomasum in ruminant digestive system?
True stomach
-produces acid
Digestive system of the horse (elephant, rabbit)
Monogastric with functional cecum
Classification of the digestive system of horse
Nonruminant herbivore
-simple stomach yet available to digest forage
Where is the site of microbial fermentation in horses?
Cecum
Horses mouth will produce
fair amount of siliva (10gal/day)
-no salivary enzymes (amylase)
Amylase breaks down
Carbohydrates
Why is the horse’s esophagus problematic?
no reverse peristaltic contractions
What are the implications of having no peristaltic contractions?
Horse can’t throw up nor burp
Horse have relatively
small stomach for their size (3-4 gal)
What does a small stomach in a horse tells you about their behavior?
Horses have to eat lots of small meals throughout the day
Small intestine in horses have
no gallbladder (stores bile- a fluid produce by the liver that helps break down fatty foods) -secrete 300 ml/hr
Large intestine in horses is composed of
- Cecum
- small colon
- large colon
- rectumn
What happens in the cecum of a horse?
Absorption of votalite fatty acids
Synthesis of B-complex vitamins by microbes
Production of microbial proteins
Are B-complex vitamins absorb in horses? Where?
B vitamins are not absorb in the small intestine. However, there is some absorption of the B vitamins in the large intestine.
What part of the digestive track are vitamins absorb?
small intestine
Urea can be fed to cattle as a source of nitrogen. Assuming no palatability or toxitity issues, what would happen if urea was given to a horse?
Gut microbes convert it to microbial protein, but it is not absorbed.
What is coprophagy?
A behavior of an animal eating it’s own feces (because there is protein that they were not able to utilize before so this is an opportunity to recover those proteins).
Where are proteins broken down into amino acids and absorb?
Small intestine
What are the nutrients requirement
Age
Production
Body composition
Cost of nutrients
If feeding is a business expensive you have to consider how much you spend because you don’t want to be feeding excess cost if you don’t need to.
What are basic considerations when feeding livestock
Type of specie
Difference in digestive system
Basic feeding ruminants
- No limiting amino acids (they need a diet balance in energy and nitrogen)
- Vitamins consist of some B complex and K (produced by microbes) and A, D, E
- Can feed high amounts of cellulose
- Tremendous flexibility in what can be consumed.
What is DM?
Dry matter
What does DM refer to?
Water free portion
How much percentage of DM is found in grains?
70-95%
How much percentage of DM is found in forages?
5-95%
What is TDN?
Total digestible nutrients (energy)
What is CF?
Measure of our lowly digestive system
How to calculate protein (CP)
amount of nitrogen x 6.25
True protein refers?
actual amino acid composition
What is NPN? Give an example?
non-protein nitrogen
Ex: uria
Which of the typical rumen volatile fatty acids normally is present in the greatest quantity in the rumen?
Acetic
Dry Forages
Contains:
- More than 18% crude fiber
- More than 85% DM
- Low in energy
- Ex: Stalks, Straw, Hay
Fresh Forages
Contains:
- High in moisture, 5-20% DM
- High CF
Silage
Does not grow all year around Contains: -Forage crops (whole plant) -Preserved by fermentation under anaerobic conditions -30-60% DM Ex: Corn silage, haylage
Animal Sources
- Meat meal
- Blood meal
- Feather meal
- Dry wheat or milk
- NPN- uria (281% CP)
What are other classes of feedstuff?
- Protein supplements
- Plant sources
- Animal Sources
Why do we care about nutrition?
Because it makes 45-75% of the cost of production
What does nutrition affect?
- Overall health
- Physical ability/performances
- Reproduction
- Diseases susceptibility/Recovery
What are the four types of nutrients?
- Dietary nonessential
- Dietary essential
- Macronutrients
- Micronutrients
Dietary nonessential
Things we don’t need but doesn’t mean we can’t consume it.
Dietary essential
Things that must come in diet
Macronutrients
Things we need in high abundance
Micronutrients
Things we need in trace amounts
What are the macronutrients that livestock need to consume?
- Protein
- Carbohydrates/
- Fats
What are the micronutrients that livestock need to consume?
- Water
- Minerals
- Vitamin
Which nutrients can be used as a source of energy?
- Protein
- Carbohydrates
- Fat/lipid
What do we use water for?
- Transport
- Osmotic pressure
- Cellular function
- Temperature regulation
- Joint lubrication
How much water do swine needs?
1/2-4 gal/day
How much water to horses need?
10-14 gal/day
How much water to cows need?
10-40 gal/day
How much water do sheep need?
1-3 gal/day
What are carbohydrates made of?
Carbon, Hydrogen, and Oxygen