Concentrate Treatment (% of liveweight) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|

0 | 0.6 | 1.2 | 1.8 | 2.4 | SE | Pr > F | ||||||

Intake | ||||||||||||

Concentrate intake (kg DM/d) | 0.00 |
^{a}
| 1.27 |
^{b}
| 2.66 |
^{c}
| 3.78 |
^{d}
| 4.29 |
^{d}
| 0.22 | <0.0001 |

Guinea grass intake (kg DM/d) | 2.19 |
^{a}
| 2.17 |
^{a}
| 1.94 |
^{ab}
| 1.56 |
^{b}
| 1.53 |
^{b}
| 0.22 | 0.0198 |

Rice straw intake (kg DM/d) | 1.83 |
^{a}
| 1.72 |
^{a}
| 1.56 |
^{a}
| 1.11 |
^{b}
| 0.61 |
^{c}
| 0.11 | <0.0001 |

Substitution rate (kg DM/kg DM) | n.a. | 0.10 |
^{a}
| 0.25 |
^{ab}
| 0.37 |
^{bc}
| 0.49 |
^{c}
| 0.10 | 0.0143 | |

^{1}OM intake (kg/day)
| 3.57 |
^{a}
| 4.63 |
^{b}
| 5.59 |
^{c}
| 5.93 |
^{c}
| 5.96 |
^{c}
| 0.25 | <0.0001 |

^{2}GE intake (MJ/d)
| 69.3 |
^{a}
| 89.7 |
^{b}
| 108.0 |
^{c}
| 114.5 |
^{c}
| 115.3 |
^{c}
| 4.9 | <0.0001 |

^{3}CP intake (kg/d)
| 0.343 |
^{a}
| 0.540 |
^{b}
| 0.732 |
^{c}
| 0.850 |
^{d}
| 0.910 |
^{d}
| 0.037 | <0.0001 |

^{4}EE intake (kg/d)
| 0.053 |
^{a}
| 0.121 |
^{b}
| 0.192 |
^{c}
| 0.244 |
^{d}
| 0.266 |
^{d}
| 0.011 | <0.0001 |

^{5}NDF intake (kg/d)
| 2.97 |
^{a}
| 3.01 |
^{a}
| 2.86 |
^{a}
| 2.38 |
^{a}
| 2.56 |
^{a}
| 0.33 | 0.2994 |

Digestibility period | ||||||||||||

OM digestibility (%) | 54.3 |
^{a}
| 60.7 |
^{b}
| 62.8 |
^{bc}
| 66.9 |
^{c}
| 75.1 |
^{d}
| 2.2 | <0.0001 |

Digestible OM intake (kg/d) | 1.89 |
^{a}
| 2.58 |
^{b}
| 3.27 |
^{c}
| 3.69 |
^{cd}
| 4.25 |
^{d}
| 0.27 | <0.0001 |

Gross energy digestibility (%) | 75.3 |
^{c}
| 80.0 |
^{bc}
| 87.8 |
^{a}
| 83.3 |
^{ab}
| 83.2 |
^{ab}
| 3.1 | 0.0171 |

Digestible energy intake (MJ/d) | 55.7 |
^{a}
| 71.2 |
^{b}
| 92.7 |
^{c}
| 93.3 |
^{c}
| 97.2 |
^{c}
| 5.3 | <0.0001 |

CP digestibility (%) | 57.04 |
^{ab}
| 62.1 |
^{ab}
| 62.36 |
^{ab}
| 66.6 |
^{bc}
| 73.03 |
^{c}
| 3.1 | 0.0019 |

EE digestibility (%) | 25.5 |
^{d}
| 51.4 |
^{c}
| 59.7 |
^{b}
| 71.8 |
^{a}
| 76.7 |
^{a}
| 3.9 | <0.0001 |

NDF digestibility (%) | 59.7 |
^{a}
| 57.4 |
^{a}
| 48.6 |
^{b}
| 41.9 |
^{b}
| 43.1 |
^{b}
| 4.0 | 0.0012 |

Faecal N (kg/d) | 0.025 |
^{a}
| 0.0321 |
^{b}
| 0.0413 |
^{c}
| 0.0422 |
^{c}
| 0.0386 |
^{c}
| 0.0022 | <0.0001 |

Liveweight | ||||||||||||

Initial liveweight (kg) | 199 |
^{a}
| 206 |
^{a}
| 200 |
^{a}
| 195 |
^{a}
| 200 |
^{a}
| 31.4 | 0.9983 |

Final liveweight (kg) | 208 |
^{a}
| 248 |
^{b}
| 266 |
^{bc}
| 271 |
^{c}
| 279 |
^{c}
| 6.2 | <0.0001 |

Liveweight gain (kg/d) | 0.092 |
^{a}
| 0.577 |
^{b}
| 0.792 |
^{c}
| 0.843 |
^{c}
| 0.943 |
^{c}
| 0.074 | <0.0001 |