B8

Question 1

What is urea?

Answer 1

Urea is an important indicator of the protein-energy ratio. It is expressed as UFP, which represents the ability a bacteria has to utilise ammonia for microbial protein synthesis

Urea helps maximize the benefits of poor-quality grazing by optimizing digestion

Question 2

What is UFP?

Answer 2

Urea Fermentation Potential

Question 3

What does it mean if the UFP is zero?

Answer 3

There is a sufficient energy for the conversion of NH4 to bacterial protein

Question 4

What does it mean if the UFP is negative? And what can we do?

Answer 4

There is a high amount of energy and less protein

We supplement NPN (Non-Protein Nitrogen) in the form of urea

Question 5

What does it mean if the UFP is positive? And what can we do?

Answer 5

There is an energy deficit and a high amount of protein, such as ammonia

Question 6

Optimal urea in the milk: (number)

Answer 6

3.-6 mmol/L

Question 7

When is it optimal to measure the urea?

Answer 7

When the level would be at its peak, 2-4 hrs after feeding in the afernoon

Question 8

Name some factors influencing the milk urea concentration:

Answer 8

1. The cow: Health status, BW, stage of nutrition, stage of maturity
2. Environment: Lower in winter, housing
3. Time of the sample taken: Lower value in morning

Question 9

Causes of high ureal levels:

Answer 9

1. RDP (Rumen Degradable Protein) is too high = milk urea increases

Question 10

Causes of low urea levels:

Answer 10

1. a decrease in terminal fermentation
2. energy decreases, enzyme production decreases