Body weight.

See also Weight gain;

Weight loss

and body composition, 23–26

empty (EBW), 6, 22–23, 25, 33, 35

and energy reserves, 36

equivalent shrunk (EQSBW), 19, 26, 27, 29

initial, and dry matter intake, 89–90

mature, 47

and nutrient requirements, 104

at puberty, 47

shrunk (SBW), 22, 23, 26

standard reference (SRW), 26, 29

surface area and, 9

systems, 24–27, 29

and water intake, 81

Boran, 6

Bos indicus breeds

birth weights, 40

energy and protein requirements, 31, 32

maintenance energy requirements, 6, 7

puberty, 47

Bos taurus breeds

birth weights, 40

energy and protein requirement system, 29

maintenance energy requirements, 7

puberty, 47

Bovine somatotropin, 31

Brahman, 7, 90

Braunvieh, 6

Breeding herd replacements

body weight, 26, 47

energy and protein requirements, 32–33

nutrient requirements, 108

Breeding performance.

See also Reproduction

calving interval, 48

conception rates, 33, 67

condition and, 48

determinants, 46–49, 64, 66, 67

energy requirements for, 5

feeding and, 46

females, 47–48

heifer development and, 46–47

males, 48–49

maturity and, 46

rebreeding, 41, 48

reproducing females, 47–48

weight and, 27, 47–48

Breeds.

See also specific breeds

and birth weights, 40, 115

British, 22, 23, 24, 33, 34, 35

and energy requirements, 6–7, 22, 29

European, 32, 33, 34, 35

and maintenance, 6

maintenance requirement multipliers, 115

milk production, 115

and nutrient utilization, 57

and protein requirements, 29

and puberty, 47

Bromine, 55

Brown Swiss, 7, 42

Bulls

breeding performance, 48–49

diet evaluation, 107

nutrient requirements, 106

C

Cadmium, 55

California Net Energy System, 5

Calcium

deficiency, 55–56

functions and biodistribution, 55

nutrient interactions, 55, 57, 66, 67, 76, 77

requirements, 54, 55, 104, 118

sources, 56

toxicity, 56

Calves

birth-weight determinants, 40–41, 115

body weight and composition, 23

dry matter intake, 97–98

milk consumption, 44–45

neonatal mortality, 47

nutrient requirements, 56, 57, 58, 63, 64–65, 98

stocker, 17

stressed, 97–98, 99

twins, 41

weaning weight, 48, 58

Carbohydrates, 17, 18, 57, 79, 121, 122

Casein, 31

Charolais, 6–7, 63

Chianina, 6, 7

Chlorine

deficiency, 60

functions and biodistribution, 60

requirements, 60, 98

sources, 60

toxicity, 60

Choline

deficiency, 80

sources and functions, 80

Chromium, 61

Cimaterol, 31

Clover, and sweet clover disease, 78

Cobalt

deficiency, 62

functions and biodistribution, 61–62

nutrient interactions, 79

requirements, 62

sources, 62

toxicity, 62

Front Matter (R1-R14)

Overview (1-2)

1 Energy (3-15)

2 Protein (16-21)

3 Growth and Body Reserves (22-39)

4 Reproduction (40-53)

5 Minerals (54-74)

6 Vitamins and Waters (75-84)

7 Feed Intake (85-96)

8 Implications of Stress (97-101)

9 Tables of Nutrient Requirements (102-112)

10 Prediction Equations and Computer Model (113-132)

11 Composition of Selected Feeds (133-148)

Appendix: NRC Model User (149-218)

Glossary (219-223)

About the Authors (224-224)

Index (225-234)