Dairy Cattle Nutrition: Intro

Question 1

In dairy cow and on the first 5 weeks of lactation, the fat content of milk ___ ?

A) Increases, unlike milk volume produced

B) Decreases, unlike milk volume produced

C) Increases, like milk volume produced

D) Decreases, like milk volume produced

Answer 1

B) Decreases, unlike milk volume produced

Question 2

In which part of the lactation curve do cows produce the highest amount of milk per day?

A) 10 weeks

B) 20 weeks

C) 5 weeks

D) 40 weeks

Answer 2

C) 5 weeks

Question 3

Dry Matter Intake (DMI) increases with lactation

True or False?

Answer 3

True

Question 4

How long is the gestation period for dairy cows?

Answer 4

280 days

Question 5

Milk production is never limited by the genetic and environmental component

True or False?

Answer 5

False

Milk production is always limited by the genetic and environmental component
• 25% Heredity
• 75% Environment

Question 6

What is the lifespan of dairy cows?

Answer 6

20 years

Question 7

What is the target for dry period in dairy cows?

A) 30 days

B) 60 days

C) 90 days

Answer 7

B) 60 days

Question 8

What 2 things will ultimately determine the success of every Dairy Op?

Answer 8

Nutrition and Feeding

Question 9

What is the percentage of feed costs worth to the total cost of producing milk?

Answer 9

40-50%

Question 10

Body weight and BCS decreases during peak lactation and then increases afterwards

True or False

Answer 10

True

Question 11

5 reasons nutrients are used for in dairy cows

Answer 11

1) Growth in the immature animal
2) Pregnancy (especially the last 3 months)
3) Fattening/Regaining normal weight lost during lactation
4) Maintenance
5) Lactation / Milk Production

Question 12

Larger dairy farms have higher costs and lower profits

True or False?

Answer 12

False

Larger dairy farms have lower costs and higher profits