Animal Nutrition Terms Quiz
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Questions and Answers

What does TDN stand for in animal nutrition?

  • Total Digestible Nutrients (correct)
  • Total Digestive Energy
  • Total Dietary Nutrients
  • Total Dietary Needs

    • Cereal grains typically have lower TDN values than leguminous hay.

    False

    How is the TDN value of a feed determined?

    Through digestion trials measuring faecal output.

    A __________ is the amount of feed allowed for an animal during a 24-hour period.

    <p>ration</p> Signup and view all the answers

    Match the following feeds with their descriptions:

    <p>Flax seeds = Rich in fat, providing more than 100 lbs of TDN per 100 lbs of dry feed Leguminous hay = Contains smaller amounts of TDN than grains Straws = Has especially low TDN values Cereal grains = Rich source of TDN</p> Signup and view all the answers

    Which nutrient is most represented in a protein supplement?

    <p>Protein</p> Signup and view all the answers

    Natural feeds include only synthetic nutrients.

    <p>False</p> Signup and view all the answers

    What are supplements in animal nutrition?

    <p>Concentrated sources of protein, minerals, or vitamins added to the diet.</p> Signup and view all the answers

    What does a balanced ration provide for an animal?

    <p>All necessary nutrients in proper amounts</p> Signup and view all the answers

    A maintenance ration is necessary for animals that are highly active and producing products.

    <p>False</p> Signup and view all the answers

    Define nutritive ratio (NR).

    <p>The ratio between digestible crude protein (DCP) and digestible carbohydrates and fats multiplied by 2.25.</p> Signup and view all the answers

    The nutritive ratio is calculated as NR = DCP : DC + _____ x 2.25.

    <p>DF</p> Signup and view all the answers

    Which of the following groups corresponds to a narrow nutritive ratio?

    <p>1:5 or less</p> Signup and view all the answers

    The biological value (BV) measures the amount of nitrogen retained by an animal after digestion.

    <p>True</p> Signup and view all the answers

    What does an NR of 1:10.4 indicate regarding corn?

    <p>For every pound of digestible protein in corn, there are 10.4 pounds of digestible carbohydrates and fats.</p> Signup and view all the answers

    Match the following types of nutritive ratios with their descriptions:

    <p>Narrow NR = 1:5 or less, high in protein content Medium NR = 1:6 - 1:7, middle in protein content Wide NR = 1:8 or more, low in protein content</p> Signup and view all the answers

    What does Apparent Biological Value (BV%) measure?

    <p>The proportion of feed protein utilized for synthesizing body tissues</p> Signup and view all the answers

    Animal proteins generally have lower biological values than plant proteins.

    <p>False</p> Signup and view all the answers

    What is the formula for calculating Apparent Biological Value (BV%)?

    <p>BV% = (N intake - [fecal N + urinary N]) / (N intake - fecal N) x 100</p> Signup and view all the answers

    The variable MFN in the formula stands for __________.

    <p>Metabolic faecal nitrogen</p> Signup and view all the answers

    Which of the following is considered a macronutrient?

    <p>Carbohydrates</p> Signup and view all the answers

    Match the following variables with their descriptions:

    <p>N intake = Total nitrogen consumed by the animal Fecal N = Nitrogen excreted in feces EUN = Endogenous urinary nitrogen BV = Biological Value of feed protein</p> Signup and view all the answers

    Digestible Nutrient (DN) refers to the portion of a nutrient that is excreted in the feces.

    <p>False</p> Signup and view all the answers

    What is the formula to calculate the digestion coefficient?

    <p>Digestion coefficient = (Digestible nutrient / Nutrient intake) x 100</p> Signup and view all the answers

    Which of the following factors can affect the biological values of feed proteins?

    <p>All of the above</p> Signup and view all the answers

    The calculation of biological value can be recorded in tables of feed description.

    <p>False</p> Signup and view all the answers

    The Total Digestible Nutrients (TDN) is the sum of the percentages of __________, __________, and __________.

    <p>digestible carbohydrates, digestible proteins, digestible fat</p> Signup and view all the answers

    Match the following terms with their correct definitions:

    <p>Nutrient = A constituent in food that supports life Macronutrient = Nutrient required in high amounts Micronutrient = Nutrient required in low amounts Digestible Nutrient = Portion of a nutrient that is digested and absorbed</p> Signup and view all the answers

    According to the provided nitrogen balance data, what is the calculated Apparent Biological Value (BV%)?

    <p>79%</p> Signup and view all the answers

    If an animal is given 50 g of protein and excretes 5 g in fecal matter, what is the digestible nutrient of protein?

    <p>45 g</p> Signup and view all the answers

    Micronutrients include carbohydrates, proteins, and fats.

    <p>False</p> Signup and view all the answers

    The digestion coefficient can be calculated by multiplying the Digestible Nutrient by __________.

    <p>100/Nutrient intake</p> Signup and view all the answers

    Study Notes

    Technical Terms in Animal Nutrition

    • Nutrition: The sum of all processes by which an animal or plant utilizes a food substance.
    • Nutrient: A feed constituent (or group of constituents) with a similar chemical composition that supports life. It's the fundamental unit of a feedstuff, supporting life. Examples include carbohydrates, lipids, proteins, water, vitamins, and minerals. Air and water might also be considered nutrients.

    Macronutrients and Micronutrients

    • Macronutrients: Nutrients required in high amounts (kilograms or percentages). Carbohydrates, lipids, and proteins are macronutrients, forming the largest portion of most foods.
    • Micronutrients: Nutrients needed in low concentrations (nanograms, micrograms, or milligrams per kilogram). Vitamins and minerals are micronutrients.

    Digestible Nutrient (DN)

    • Digestible Nutrient (DN): The portion of a nutrient that's digested and absorbed by the body.

    Digestion Coefficient (DC)

    • Digestion Coefficient (DC): The percentage of a nutrient digested in a feed or ration.
      Calculated as: (Digestible nutrient / Nutrient intake) x 100

    Total Digestible Nutrients (TDN)

    • Total Digestible Nutrients (TDN): The sum of percentages of digestible organic nutrients. This includes digestible carbohydrates (crude fiber + nitrogen-free extract), digestible proteins, and digestible fat (multiplied by 2.25, as fat has a higher energy value).

    Feeding Stuff

    • Feeding Stuff: Any product that, when properly used in the diet, provides nutritional value.

    Supplements

    • Supplements: Concentrated sources of protein, minerals, or vitamins.
    • Protein supplement: Feeds with 20% or more protein.
    • Mineral and vitamin supplements: Mineral or vitamin carriers added to the ration.

    Ration

    • Ration: The amount of feed allowed for a given animal in 24 hours. Can be given at one time or in portions throughout the day.

    Balanced Ration

    • Balanced Ration: A ration that meets all nutrient requirements for an animal over 24 hours, providing appropriate amounts of proteins, carbohydrates, fats, minerals, and vitamins.

    Maintenance Ration

    • Maintenance Ration: The minimum feed needed to maintain an animal's life without weight gain or loss, typically for animals that are not working or producing.

    Nutritive Ratio (NR)

    • Nutritive Ratio (NR): The ratio between digestible crude protein (DCP) and digestible carbohydrates and fats (multiplied by 2.25). Represents the ratio of digestible nitrogenous to non-nitrogenous nutrients.
    • NR Calculation: DCP / (DC + (DF x 2.25)).

    Biological Value (BV)

    • Biological Value (BV): The proportion of digested and absorbed dietary protein retained and used by the animal, not excreted in the urine. Calculated as: [N intake – (fecal N + urinary N)]/ N intake x 100

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    Technical Terms for Animal Nutrition PDF

    Description

    Test your knowledge on the essential terms and concepts of animal nutrition! This quiz covers crucial topics such as macronutrients, micronutrients, and digestibility metrics, helping you understand the dietary needs of animals. Perfect for students and enthusiasts alike!

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