Lecture quiz 4/28/23 (Friday) from lec 26

Question 1

What are the two types of food/feed evaluation

Answer 1

chemical and biological

Question 2

What is chemical evaluation

Answer 2

• uses laboratory techniques to determine the concentration of nutrients and energy in a feedstuff or diet

Question 3

What is biological evaluaation

Answer 3

• uses of animals to measure utilization of nutrients from a given feedstuff.

checking for
growth performance, digestibility, palatability

Question 4

What is the first step of doing chemical eval?

Answer 4

• representative ssample (needs to be dry and ground)

Question 5

What are the analytical methods of chemical evaluation?

Answer 5

• proximate analysis
  -near-infrared spectroscopy
• van soest detergent fiber analysis

Question 6

What is proximate analysis?

Answer 6

has six categories
- water, crude protein, ether extract, crude fiber, ash, NFE