Graded Quiz 4 (Lectures 17-20)

Which type of fiber is most important to maintain rumen health in dairy cows?

peNDF

Rumen degradable protein/degradable intake protein is sufficient to meet the protein requirements of dairy cows during lactation.

False

Which minerals are negatively impacted by high potassium in forages: calcium, chloride, phosphorous, magnesium?

calcium

magnesium

How much has the ability of calves to absorb immunoglobulins reduced by 8 hours following birth?

50%

What are the issues for colostrum produced by heifers? 

lower volume

lower IgG concentrations

Where in the GIT is undegradable intake protein (UIP) digested?

small intestine

What events happen as peak milk production is reached in the dairy cow in regards to DMI and BCS?

What is the limit for including grain in the ration of dairy cows?

60%

Which substances compose whey and are digested and absorbed in the small intestine: casein, fat, lactose, minerals?

lactose

minerals

What are characteristics of subacute rumen acidosis (SARA)?

prolonged periods of depressed rumen pH

VFA accumulation that exceeds absorptive capacity