Item | Diet | SEM^{2} | *P*-value |
---|

CON | OPT | OPTLEU | OPT vs. CON | OPT LEU vs. CON | OPTLEU vs. OPT |
---|

Early lactation (day 4 to 8) | |

Number of sows | 12 | 11 | 11 | | | | |

DE/GE, % |

Analyzed | 88.3 | 87.2 | 85.2 | 0.4 | 0.162 | < 0.01 | 0.007 |

Calculated | 87.3 | 83.6 | 83.7 | | | | |

ME/DE, % |

Analyzed | 97.7 | 98.5 | 98.2 | 0.4 | 0.324 | 0.656 | 0.836 |

Calculated | 96.0 | 97.0 | 97.0 | | | | |

NE_{lactation}/ME, %^{3} |

Analyzed | 51.4 | 49.7 | 58.9 | 4.8 | 0.967 | 0.507 | 0.380 |

Calculated | 74.8 | 75.8 | 75.7 | | | | |

NE_{milk}/ME, %^{4} | 57.5 | 64.4 | 65.0 | 4.3 | 0.500 | 0.448 | 0.996 |

Peak lactation (day 14 to 18) |

Number of sows | 11 | 11 | 11 | | | | |

DE/GE, % |

Analyzed | 88.3 | 87.2 | 85.2 | 0.4 | 0.162 | < 0.01 | 0.007 |

Calculated | 87.3 | 83.6 | 83.7 | | | | |

ME/DE, % |

Analyzed | 97.5 | 98.7 | 98.0 | 0.4 | 0.063 | 0.635 | 0.327 |

Calculated | 96.0 | 97.0 | 97.0 | | | | |

NE_{lactation}/ME, %^{3} |

Analyzed | 48.0 | 63.0^{*} | 56.2 | 4.8 | 0.092 | 0.468 | 0.584 |

Calculated | 74.8 | 75.8 | 75.7 | | | | |

NE_{milk}/ME, %^{4} | 51.9 | 72.4 | 63.5 | 4.4 | 0.008 | 0.167 | 0.339 |

^{1}Data are least squares means^{2}Maximum value of the standard error of the means^{3}\( {\mathrm{NE}}_{\mathrm{lactation}}\left(\mathrm{MJ}/\mathrm{kg}\ \mathrm{feed}\ \right)=\frac{\mathrm{Milk}\ \mathrm{energy}\ \mathrm{output}\left(\mathrm{MJ}/\mathrm{d}\right)-\mathrm{Milk}\ \mathrm{energy}\ \mathrm{from}\ \mathrm{body}\ \left(\mathrm{MJ}/\mathrm{d}\right)}{\mathrm{Daily}\ \mathrm{feed}\ \mathrm{intake}\left(\mathrm{kg}/\mathrm{d}\right)} \)^{4}\( {\mathrm{NE}}_{\mathrm{milk}}\left(\mathrm{MJ}/\mathrm{kg}\ \mathrm{feed}\ \right)=\frac{\mathrm{Milk}\ \mathrm{energy}\ \mathrm{output}\left(\mathrm{MJ}/\mathrm{d}\right)}{\mathrm{Daily}\ \mathrm{feed}\ \mathrm{intake}\left(\mathrm{kg}/\mathrm{d}\right)} \)^{*}Main effect of period (early and late) was significant (*P* < 0.05).