A15

Question 1

How old and heavy is a cow when its called a heifer?

Answer 1

5-6 months old
200 kg

Question 2

How old and BW of first insemination?

Answer 2

15 months old
330-350 kg

Question 3

What are the possible rearing intensities?

Answer 3

Very slow
moderate
intense
physiological intense

Question 4

what is the “very slow” rearing intensity?

Answer 4

Low body weight gain
Breeding at 18 months
BW at calving: less than 500 kg at calving

Question 5

what is the “moderate” rearing intensity?

Answer 5

700gr daily BW gain
Breeding before 18 months
BW at calving: more than/equal to 500 kg

Question 6

what is the “Intense” rearing intensity?

Answer 6

800-900gr daily weight gain
Breeding before 18 months

Question 7

what is the “Physiological intense” rearing intensity?

Answer 7

1-1.2 kg daily weight gain
Breeding at 12-13 months

Question 8

What is the BCS of dairy cow at calving?

Answer 8

5

Question 9

What is the BCS of beef heifer at calving?

Answer 9

6

Question 10

What can happen if the BCS is below optimal?

Answer 10

Calving period is prolonged
Dystocia = Calving difficulty
Calves are weaker
Less colostrum and milk available with the mother

Question 11

What can happen if the BCS is higher than optimal?

Answer 11

Calving period is prolonged
Re-breeding interval increases
Calves can be overweight

Question 12

what is the expression of protein and energy requirements?

Answer 12

MP = Metabolizable protein

NEm = Net Energy for maintenance

Question 13

CP requirement:

Answer 13

10-11%

Low because the ovaries are sensitive to NH3

Question 14

CF requirement:

Answer 14

6%

Question 15

What type of feed to give heifers:

Answer 15

Pasture, kept separate from older cows
Corn silage + hay + cocentrate
Mineral, vitamin, salt, water

Question 16

BW at birth of beef heifer:

Answer 16

35-40kg

Question 17

Weaning of beef calves:

Answer 17

60-70 months
240 kg

Question 18

Mating of beef heifers

Answer 18

13-15 months old
340-360 kg

Question 19

1st calving, age and weight

Answer 19

24 months
550-600 kg

Question 20

There are two types of meat from cow, what is the name and the difference?

Answer 20

Veal and beef

Veal = Less than a year calf
Beef = More than a year

Question 21

Fattening of growing bulls:

Answer 21

Can be fattened up to 500-600kg
Use to methods: Traditional or Intensive

Question 22

What is the traditional fattening method of bulls?

Answer 22

Daily weight gain: +1kg/Day
Duration 16-18 months

Question 23

What is the traditional fattening method of bulls?

Answer 23

Daily weight gain: +1.3kg/Day
Duration 13-15 months

They are fed more concentrate

Question 24

BW of finished fattening period of young heifers and length:

Answer 24

BW: 400-500 kg
Lenght: 16-20 months

Question 25

BW of angus beef after fattening period, and length of period

Answer 25

Bulls: 650kg
Heifers: 550-600kg

Length: 9-10 months