Parameter | Year | Pine bark | Compost | Control | P |
---|---|---|---|---|---|

Height increment (cm) | 2004–2005 | 12.5 | 20 | 11.11 | NS |

2005–2006 | 67.61 ab | 77.83 a | 51.08 b | ** | |

Total height increment (cm) | 2004–2006 | 80.11 | 97.83 | 62.19 | NS |

Diameter increment (mm) | 2004–2005 | 9.5 ab | 8.73 b | 10.41 a | * |

2005–2006 | 16.3 b | 19.17 a | 14.09 b | ** | |

2006–2007 | 17.04 | 18.17 | 16.39 | NS | |

Total diameter increment (mm) | 2004–2007 | 42.84 b | 46.07 a | 40.89 b | * |

Shoot length (cm) | 2005 | 20.02 b | 25.97 a | 18.14 b | ** |

2006 | 75.45 b | 83.57 a | 58.83 c | ** | |

2007 | 82.94 a | 79.8 a | 63.67 b | ** |

↵

^{z}Data are reported as means and subjected to analysis of variance. Different letters within the same row indicate statistical differences at*P*≤ 0.05 (*) or*P*≤ 0.01 (**) using Duncan test.NS = nonsignificant.