Applied Feeding 2 Flashcards
What does calculating requirements start with?
description of the animal
What do you need to identify for calculating requirements?
-key parameters to use to guide identification of requirements for nutrients
Examples of parameters you need to identify
-body weight
-physiological state
-production level
-breed
-age
-mature size
What does descriptive information allow for?
-understanding of the requirements of an animal
What can be calculated from the description?
requirements
After maintenance is added, what is added next?
-add requirements related to production or physiological state
What should always be included in a calculation?
maintenance requirements
What are the parts of a ration formulation?
-requirements
-intake
What does intake provide?
-the bounds for the amount of feed an animal will eat
-determines the density of nutrients to include in order to meet requirements
Where can we get food composition values?
“Library” values are provided with feeding standards and software
How does someone use a feed sample analysis? what do they get from it?
-submit feed sample to commercial lab
-often request a package of analyses that provides a profile of nutrients
What does the “Library” represent? provide?
-represent averages or typical compositions for feeds
-provided sufficient for highly consistent feeds that vary little for the purpose of the ration
What do requirements and feedstuff with nutrient composition provide the basis for?
Ratio formulation
What is combined (mixed) to meet nutrient requirements?
Feedstuffs
What happens when a low protein feed and high protein feed are combined? what also does this?
-they provide the moderate level of protein required for the animal
-vitamins and minerals
What do nutrient compositions provide?
The information needed for developing a ration with appropriate concentration of nutrients to meet the quantity requirements of the animal based on intake
Are requirements qualitative or quantitative?
Quantitative
-mass, amount
What do feed formulations include?
concentrations
What is nutrient concentration multiplied by amount eaten equal to?
amount of nutrient consumed
What is weight of feed multiplied nutrient % equal to?
weight of nutrient consumed
What is weight multiplied by kcal/weight equal to?
kcal consumed
How will ration be explained?
on a concentration basis by mixing feeds
What will intake determine?
-the amounts consumed and used to meet requirements
What will equation 1 add?
-weights of the 2 ingredients to total the total feed weight needed
-soybean meal in kg + corn in kg = Total feed weight in kg
What will equation 2 incorporate?
-the nutrient concentration of each feedstuff, its, weight, and total amount of the nutrient needed
What is an example of equation 2?
-SBM is 44% and Corn is 8% CP and need at 16% CP
(0.44 * SBM) + (0.08 * Corn) = 0.16 * Total feed weight
-SBM protein in kg + Corn protein in kg = feed protein in kg
What units are all variable in?
weight
-kg
-Lb
-g
What are coefficients?
concentrations
-%
-Mcal/Lb
-kcal/kg
