Table 5. Hull-less Oats Fed to Yearling Coltsa

 

Treatments

  

Item

0%

20%

40%

60%

SEa

P-Valuea

Body weights, lb

  

Initial

698.8

716.3

723.2

708.8

26.5

.93

Day 281,2

729.7

752.1

775.2

758.9

4.63

.001

Day 561,2

736.6

776.3

800.1

790.0

4.98

.001

Final1,2

741.8

792.8

834.9

839.1

6.66

.001

Avg. daily gain, lb

  

First 28 d1,2

.66

1.46

2.28

1.70

.165

.001

Second 28 d1

.24

.87

.89

1.11

.174

.013

Last 28 d1

.18

.59

1.24

1.75

.165

.001

Overall1,2

.36

.97

1.47

1.52

.079

.001

Body length, cm

  

Initial

136.8

135.0

135.1

135.4

1.1

.65

Day 28

133.1

134.1

134.8

132.9

1.0

.53

Day 561

133.0

135.3

137.0

136.8

.72

.003

Final1,2

134.1

136.3

139.3

138.3

.62

.001

Cannon circumference, cm

  

Initial

17.7

17.5

17.8

17.7

.17

.46

Day 28

17.8

17.7

18.0

18.0

.12

.24

Day 561

17.6

17.7

17.9

18.1

.10

.007

Final1

17.6

17.7

18.0

18.3

.084

.001

Forearm circumference, cm

  

Initial

48.6

49.2

49.7

48.3

.57

.34

Day 28

47.5

49.0

48.9

49.1

.59

.19

Day 561

47.4

49.7

50.3

51.7

.67

.001

Final1

47.6

50.1

51.1

52.8

.59

.001

Girth circumference, cm

  

Initial

156.4

154.3

155.5

154.1

.76

.16

Day 281,2

154.9

156.5

158.0

157.4

.50

.002

Day 561,2

155.8

158.5

159.3

158.9

.46

.001

Final1,2

155.7

160.1

161.6

162.6

.58

.001

Gaskin circumference, cm

            

Initial

40.2

40.0

41.2

40.6

.39

.22

Day 28

40.6

40.6

40.9

40.9

.22

.53

Day 561

40.5

41.1

41.7

41.6

.30

.05

Final1

40.3

40.6

41.3

42.0

.31

.003

Hip height, in

  

Initial

56.7

56.7

57.4

56.6

.36

.36

Day 28

56.2

56.8

57.0

56.7

.22

.14

Day 561,2

56.4

57.2

57.4

57.2

.21

.013

Final1

56.6

57.2

57.6

57.7

.24

.014

Wither height, in

  

Initial

55.1

54.9

56.1

55.0

.46

.28

Day 28

54.9

55.3

55.4

55.1

.21

.33

Day 561,2

55.0

55.8

55.7

55.7

.19

.015

Final1,2

55.3

55.9

56.1

55.9

.16

.018

a Weight, average daily gain and initial body measurements, with the exception of initial weight, were all tested using initial weight as a covariate. Intermediate and final body measurements were tested using the value of that measurement at the initiation of the experiment as a covariate.

b In each row, SE and P-value refer to standard error of a mean (averaged across treatments) and probability of a treatment effect.

1,2 Denotes a linear or quadratic effect, respectively (P< .05) when tested using single degree of freedom orthogonal polynomial contrasts