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Flashcards in Dairy Cattle Deck (64)
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1

How many calves per year per cow is the objective

1 calf/cow per year

2

T/F: Milk is produced year round and cows are milked year round

FALSE

-Milk is produced year round
-COWS ARE MILKED 10 MONTH/YR

3

Define grazing

Animals feed on pasture and are supplemented with grain/hay during winter

-low yield animals

4

How often should cows be milked?

q12 hrs

5

Four factors of quality in milk (affects price)

1. volume
2. fat content
3. protein content
4. Somatic Cell Count

6

What percent of dairy farms are family owned

97%

7

Average size of dairy herd

179 cows

8

How much milk will a dairy cow produce on average per day

6.5 gallows (24-25 L)

9

Gestation period for dairy cattle

280 days

10

Lactation period for dairy cattle

304 days, milking begins when calf is born

11

Dry period after cow's lactation period

60 days

12

How many days after parturition is a dairy cow inseminated again?

85 days

13

What happens at the end of the dry period

Parturition

14

Female calves are kept on ____artificial/mother's_____ milk

female calves are kept on artificial milk

15

Female calves are weaned at _________ days and reared for another _____ days

Female calves are weaned at **35-45** days and reared for another **420** days

16

Why would every cow lose weight during their FIRST lactation phase?

In a negative energy balance

17

Life span of dairy cattle and profitable for how many lactations?

Life span of 20 years
profitable for 3-5 lactations

18

After the profitable lactation period, what CS will you likely see

Lameness, Mastitis, Infertility

19

A cow in lactation fed correctly will use what percent feed for maintenance and what percent feed for milk production?

50/50

20

Lactation peaks at ___ - ____ weeks

4 to 10 weeks

21

Fat and protein content _____ until week 10 and then _______

Decrease until week 10, then stabilize

22

T/F: Milk production is always limited by genetic and environmental components (25% genetic, 75% environment)

True

23

What are nutrients used for in dairy cows

-growth (immature animals)
-Pregnancy (esp last 3 months)
-Fattening
-Regaining weight lost in lactation
-Maintenance
-Lactation and milk production

24

T/F: Dairy cattle are fed only roughages (pasture, hay, silage)

False,
because milk production is very demanding, dairy cattle have to be supplemented w/ **concentrate feeding and/or grains**

25

What percent of dry matter should come from roughages (and the rest from concentrates or grain)

60-80%

26

Ideal to produce hay around:

mid-spring

27

Moisture content of hay when bailed

20% or less

28

As crops mature cows will eat ___more/less___ of the green chop

LESS
leads to lower energy intake

29

What feed type is preserved in low oxygen concentrations (anaerobic)?

Silage

Also more moisture content

30

T/F: Corn silage is NOT very palatable

false, corn silage IS very palatable